org.eclipse.swt.custom.CTabFolderRenderer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.eclipse.swt.gtk.linux.aarch64 Show documentation
Show all versions of org.eclipse.swt.gtk.linux.aarch64 Show documentation
Standard Widget Toolkit for GTK on aarch64
The newest version!
/*******************************************************************************
* Copyright (c) 2000, 2020 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Lars Vogel - Bug 455263
*******************************************************************************/
package org.eclipse.swt.custom;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
/**
* Instances of this class provide all of the measuring and drawing functionality
* required by CTabFolder. This class can be subclassed in order to
* customize the look of a CTabFolder.
*
* @see Sample code and further information
* @since 3.6
*/
public class CTabFolderRenderer {
protected CTabFolder parent;
int[] curve;
int[] topCurveHighlightStart;
int[] topCurveHighlightEnd;
int curveWidth = 0;
int curveIndent = 0;
int lastTabHeight = -1;
Color fillColor;
/* Selected item appearance */
Color selectionHighlightGradientBegin = null; //null == no highlight
//Although we are given new colours all the time to show different states (active, etc),
//some of which may have a highlight and some not, we'd like to retain the highlight colours
//as a cache so that we can reuse them if we're again told to show the highlight.
//We are relying on the fact that only one tab state usually gets a highlight, so only
//a single cache is required. If that happens to not be true, cache simply becomes less effective,
//but we don't leak colours.
Color[] selectionHighlightGradientColorsCache = null; //null is a legal value, check on access
/* Colors for anti-aliasing */
Color selectedOuterColor = null;
Color selectedInnerColor = null;
Color tabAreaColor = null;
/*
* Border color that was used in computing the cached anti-alias Colors.
* We have to recompute the colors if the border color changes
*/
Color lastBorderColor = null;
private Font chevronFont = null;
//TOP_LEFT_CORNER_HILITE is laid out in reverse (ie. top to bottom)
//so can fade in same direction as right swoop curve
static final int[] TOP_LEFT_CORNER_HILITE = new int[] {5,2, 4,2, 3,3, 2,4, 2,5, 1,6};
static final int[] TOP_LEFT_CORNER = new int[] {0,6, 1,5, 1,4, 4,1, 5,1, 6,0};
static final int[] TOP_RIGHT_CORNER = new int[] {-6,0, -5,1, -4,1, -1,4, -1,5, 0,6};
static final int[] BOTTOM_LEFT_CORNER = new int[] {0,-6, 1,-5, 1,-4, 4,-1, 5,-1, 6,0};
static final int[] BOTTOM_RIGHT_CORNER = new int[] {-6,0, -5,-1, -4,-1, -1,-4, -1,-5, 0,-6};
static final int[] SIMPLE_TOP_LEFT_CORNER = new int[] {0,2, 1,1, 2,0};
static final int[] SIMPLE_TOP_RIGHT_CORNER = new int[] {-2,0, -1,1, 0,2};
static final int[] SIMPLE_BOTTOM_LEFT_CORNER = new int[] {0,-2, 1,-1, 2,0};
static final int[] SIMPLE_BOTTOM_RIGHT_CORNER = new int[] {-2,0, -1,-1, 0,-2};
static final int[] SIMPLE_UNSELECTED_INNER_CORNER = new int[] {0,0};
static final int[] TOP_LEFT_CORNER_BORDERLESS = new int[] {0,6, 1,5, 1,4, 4,1, 5,1, 6,0};
static final int[] TOP_RIGHT_CORNER_BORDERLESS = new int[] {-7,0, -6,1, -5,1, -2,4, -2,5, -1,6};
static final int[] BOTTOM_LEFT_CORNER_BORDERLESS = new int[] {0,-6, 1,-6, 1,-5, 2,-4, 4,-2, 5,-1, 6,-1, 6,0};
static final int[] BOTTOM_RIGHT_CORNER_BORDERLESS = new int[] {-7,0, -7,-1, -6,-1, -5,-2, -3,-4, -2,-5, -2,-6, -1,-6};
static final int[] SIMPLE_TOP_LEFT_CORNER_BORDERLESS = new int[] {0,2, 1,1, 2,0};
static final int[] SIMPLE_TOP_RIGHT_CORNER_BORDERLESS= new int[] {-3,0, -2,1, -1,2};
static final int[] SIMPLE_BOTTOM_LEFT_CORNER_BORDERLESS = new int[] {0,-3, 1,-2, 2,-1, 3,0};
static final int[] SIMPLE_BOTTOM_RIGHT_CORNER_BORDERLESS = new int[] {-4,0, -3,-1, -2,-2, -1,-3};
static final RGB CLOSE_FILL = new RGB(240, 64, 64);
static final int BUTTON_SIZE = 16;
static final int BUTTON_TRIM = 1;
static final int BUTTON_BORDER = SWT.COLOR_WIDGET_DARK_SHADOW;
static final int BUTTON_FILL = SWT.COLOR_LIST_BACKGROUND;
static final int BORDER1_COLOR = SWT.COLOR_WIDGET_NORMAL_SHADOW;
static final int ITEM_TOP_MARGIN = 2;
static final int ITEM_BOTTOM_MARGIN = 2;
static final int ITEM_LEFT_MARGIN = 4;
static final int ITEM_RIGHT_MARGIN = 4;
static final int INTERNAL_SPACING = 4;
static final int TABS_WITHOUT_ICONS_PADDING = 14;
static final int FLAGS = SWT.DRAW_TRANSPARENT | SWT.DRAW_MNEMONIC | SWT.DRAW_DELIMITER;
static final String ELLIPSIS = "..."; //$NON-NLS-1$
private static final String CHEVRON_ELLIPSIS = "99+"; //$NON-NLS-1$
private static final int CHEVRON_FONT_HEIGHT = 10;
//Part constants
/**
* Part constant indicating the body of the tab folder. The body is the
* underlying container for all of the tab folder and all other parts are
* drawn on top of it. (value is -1).
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_BODY = -1;
/**
* Part constant indicating the tab header of the folder (value is -2). The
* header is drawn on top of the body and provides an area for the tabs and
* other tab folder buttons to be rendered.
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_HEADER = -2;
/**
* Part constant indicating the border of the tab folder. (value is -3). The
* border is drawn around the body and is part of the body trim.
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_BORDER = -3;
/**
* Part constant indicating the background of the tab folder. (value is -4).
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_BACKGROUND = -4;
/**
* Part constant indicating the maximize button of the tab folder. (value is
* -5).
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_MAX_BUTTON = -5;
/**
* Part constant indicating the minimize button of the tab folder. (value is
* -6).
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_MIN_BUTTON = -6;
/**
* Part constant indicating the chevron button of the tab folder. (value is
* -7).
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_CHEVRON_BUTTON = -7;
/**
* Part constant indicating the close button of a tab item. (value is -8).
*
* @see #computeSize(int, int, GC, int, int)
* @see #computeTrim(int, int, int, int, int, int)
* @see #draw(int, int, Rectangle, GC)
*/
public static final int PART_CLOSE_BUTTON = -8;
public static final int MINIMUM_SIZE = 1 << 24; //TODO: Should this be a state?
/**
* Constructs a new instance of this class given its parent.
*
* @param parent CTabFolder
*
* @exception IllegalArgumentException
* - ERROR_INVALID_ARGUMENT - if the parent is disposed
*
*
* @see Widget#getStyle
*/
protected CTabFolderRenderer(CTabFolder parent) {
if (parent == null) return;
if (parent.isDisposed ()) SWT.error (SWT.ERROR_INVALID_ARGUMENT);
this.parent = parent;
}
void antialias (int[] shape, Color innerColor, Color outerColor, GC gc){
// Don't perform anti-aliasing on Mac because the platform
// already does it. The simple style also does not require anti-aliasing.
if (parent.simple) return;
String platform = SWT.getPlatform();
if ("cocoa".equals(platform)) return; //$NON-NLS-1$
// Don't perform anti-aliasing on low resolution displays
if (parent.getDisplay().getDepth() < 15) return;
if (outerColor != null) {
int index = 0;
boolean left = true;
int oldY = parent.onBottom ? 0 : parent.getSize().y;
int[] outer = new int[shape.length];
for (int i = 0; i < shape.length/2; i++) {
if (left && (index + 3 < shape.length)) {
left = parent.onBottom ? oldY <= shape[index+3] : oldY >= shape[index+3];
oldY = shape[index+1];
}
outer[index] = shape[index++] + (left ? -1 : +1);
outer[index] = shape[index++];
}
gc.setForeground(outerColor);
gc.drawPolyline(outer);
}
if (innerColor != null) {
int[] inner = new int[shape.length];
int index = 0;
boolean left = true;
int oldY = parent.onBottom ? 0 : parent.getSize().y;
for (int i = 0; i < shape.length/2; i++) {
if (left && (index + 3 < shape.length)) {
left = parent.onBottom ? oldY <= shape[index+3] : oldY >= shape[index+3];
oldY = shape[index+1];
}
inner[index] = shape[index++] + (left ? +1 : -1);
inner[index] = shape[index++];
}
gc.setForeground(innerColor);
gc.drawPolyline(inner);
}
}
/**
* Returns the preferred size of a part.
*
* The preferred size of a part is the size that it would
* best be displayed at. The width hint and height hint arguments
* allow the caller to ask a control questions such as "Given a particular
* width, how high does the part need to be to show all of the contents?"
* To indicate that the caller does not wish to constrain a particular
* dimension, the constant SWT.DEFAULT is passed for the hint.
*
* The part value indicated what component the preferred size is
* to be calculated for. Valid values are any of the part constants:
*
*
* - PART_BODY
* - PART_HEADER
* - PART_BORDER
* - PART_BACKGROUND
* - PART_MAX_BUTTON
* - PART_MIN_BUTTON
* - PART_CHEVRON_BUTTON
* - PART_CLOSE_BUTTON
* - A positive integer which is the index of an item in the CTabFolder.
*
*
* The state parameter may be one of the following:
*
*
* - SWT.NONE
* - SWT.SELECTED - whether the part is selected
*
* @param part a part constant
* @param state current state
* @param gc the gc to use for measuring
* @param wHint the width hint (can be SWT.DEFAULT)
* @param hHint the height hint (can be SWT.DEFAULT)
* @return the preferred size of the part
*
* @since 3.6
*/
protected Point computeSize (int part, int state, GC gc, int wHint, int hHint) {
int width = 0, height = 0;
switch (part) {
case PART_HEADER:
if (parent.fixedTabHeight != SWT.DEFAULT) {
height = parent.fixedTabHeight == 0 ? 0 : parent.fixedTabHeight + 1; // +1 for line drawn across top of tab
} else {
CTabItem[] items = parent.items;
if (items.length == 0) {
height = gc.textExtent("Default", FLAGS).y + ITEM_TOP_MARGIN + ITEM_BOTTOM_MARGIN; //$NON-NLS-1$
} else {
for (int i=0; i < items.length; i++) {
height = Math.max(height, computeSize(i, SWT.NONE, gc, wHint, hHint).y);
}
}
gc.dispose();
}
break;
case PART_MAX_BUTTON:
case PART_MIN_BUTTON:
case PART_CLOSE_BUTTON:
width = height = BUTTON_SIZE;
break;
case PART_CHEVRON_BUTTON:
Font prevFont = gc.getFont();
gc.setFont(getChevronFont(parent.getDisplay()));
int widthOfDoubleArrows = 8; // see drawChevron method
width = gc.textExtent(CHEVRON_ELLIPSIS).x + widthOfDoubleArrows;
height = BUTTON_SIZE;
gc.setFont(prevFont);
break;
default:
if (0 <= part && part < parent.getItemCount()) {
updateCurves();
CTabItem item = parent.items[part];
if (item.isDisposed()) return new Point(0,0);
Image image = item.getImage();
if (image != null && !image.isDisposed()) {
Rectangle bounds = image.getBounds();
if (((state & SWT.SELECTED) != 0 && parent.showSelectedImage)
|| ((state & SWT.SELECTED) == 0 && parent.showUnselectedImage)) {
width += bounds.width;
}
height = bounds.height;
}
String text = null;
if ((state & MINIMUM_SIZE) != 0) {
int minChars = parent.minChars;
text = minChars == 0 ? null : item.getText();
if (text != null && text.length() > minChars) {
if (useEllipses()) {
int end = minChars < ELLIPSIS.length() + 1 ? minChars : minChars - ELLIPSIS.length();
text = text.substring(0, end);
if (minChars > ELLIPSIS.length() + 1) text += ELLIPSIS;
} else {
int end = minChars;
text = text.substring(0, end);
}
}
} else {
text = item.getText();
}
if (text != null) {
if (width > 0) width += INTERNAL_SPACING;
if (item.font == null) {
Point size = gc.textExtent(text, FLAGS);
width += size.x;
height = Math.max(height, size.y);
} else {
Font gcFont = gc.getFont();
gc.setFont(item.font);
Point size = gc.textExtent(text, FLAGS);
width += size.x;
height = Math.max(height, size.y);
gc.setFont(gcFont);
}
}
if (shouldApplyLargeTextPadding(parent)) {
width += getLargeTextPadding(item) * 2;
} else if (shouldDrawCloseIcon(item)) {
if (width > 0) width += INTERNAL_SPACING;
width += computeSize(PART_CLOSE_BUTTON, SWT.NONE, gc, SWT.DEFAULT, SWT.DEFAULT).x;
}
}
break;
}
Rectangle trim = computeTrim(part, state, 0, 0, width, height);
width = trim.width;
height = trim.height;
return new Point(width, height);
}
private boolean shouldDrawCloseIcon(CTabItem item) {
CTabFolder folder = item.getParent();
boolean showClose = folder.showClose || item.showClose;
boolean isSelectedOrShowCloseForUnselected = (item.state & SWT.SELECTED) != 0 || folder.showUnselectedClose;
return showClose && isSelectedOrShowCloseForUnselected;
}
/**
* Returns padding for the text of a tab item when showing images is disabled for the tab folder.
*/
private int getLargeTextPadding(CTabItem item) {
CTabFolder parent = item.getParent();
String text = item.getText();
if (text != null && parent.getMinimumCharacters() != 0) {
return TABS_WITHOUT_ICONS_PADDING;
}
return 0;
}
private boolean shouldApplyLargeTextPadding(CTabFolder tabFolder) {
return !tabFolder.showSelectedImage && !tabFolder.showUnselectedImage;
}
/**
* Given a desired client area for the part
* (as described by the arguments), returns the bounding
* rectangle which would be required to produce that client
* area.
*
* In other words, it returns a rectangle such that, if the
* part's bounds were set to that rectangle, the area
* of the part which is capable of displaying data
* (that is, not covered by the "trimmings") would be the
* rectangle described by the arguments (relative to the
* receiver's parent).
*
*
* @param part one of the part constants
* @param state the state of the part
* @param x the desired x coordinate of the client area
* @param y the desired y coordinate of the client area
* @param width the desired width of the client area
* @param height the desired height of the client area
* @return the required bounds to produce the given client area
*
* @see CTabFolderRenderer#computeSize(int, int, GC, int, int) valid part and state values
*
* @since 3.6
*/
protected Rectangle computeTrim (int part, int state, int x, int y, int width, int height) {
int borderLeft = parent.borderVisible ? 1 : 0;
int borderRight = borderLeft;
int borderTop = parent.onBottom ? borderLeft : 0;
int borderBottom = parent.onBottom ? 0 : borderLeft;
int tabHeight = parent.tabHeight;
switch (part) {
case PART_BODY:
int style = parent.getStyle();
int highlight_header = (style & SWT.FLAT) != 0 ? 1 : 3;
int highlight_margin = (style & SWT.FLAT) != 0 ? 0 : 2;
if (parent.fixedTabHeight == 0 && (style & SWT.FLAT) != 0 && (style & SWT.BORDER) == 0) {
highlight_header = 0;
}
int marginWidth = parent.marginWidth;
int marginHeight = parent.marginHeight;
x = x - marginWidth - highlight_margin - borderLeft;
width = width + borderLeft + borderRight + 2*marginWidth + 2*highlight_margin;
if (parent.minimized) {
y = parent.onBottom ? y - borderTop : y - highlight_header - tabHeight - borderTop;
height = borderTop + borderBottom + tabHeight + highlight_header;
} else {
y = parent.onBottom ? y - marginHeight - highlight_margin - borderTop : y - marginHeight - highlight_header - tabHeight - borderTop;
height = height + borderTop + borderBottom + 2*marginHeight + tabHeight + highlight_header + highlight_margin;
}
break;
case PART_HEADER:
//no trim
break;
case PART_MAX_BUTTON:
case PART_MIN_BUTTON:
case PART_CLOSE_BUTTON:
case PART_CHEVRON_BUTTON:
x -= BUTTON_TRIM;
y -= BUTTON_TRIM;
width += BUTTON_TRIM*2;
height += BUTTON_TRIM*2;
break;
case PART_BORDER:
x = x - borderLeft;
width = width + borderLeft + borderRight;
if (!parent.simple) width += 2; // TOP_RIGHT_CORNER needs more space
y = y - borderTop;
height = height + borderTop + borderBottom;
break;
default:
if (0 <= part && part < parent.getItemCount()) {
updateCurves();
x = x - ITEM_LEFT_MARGIN;
width = width + ITEM_LEFT_MARGIN + ITEM_RIGHT_MARGIN;
if (!parent.simple && !parent.single && (state & SWT.SELECTED) != 0) {
width += curveWidth - curveIndent;
}
y = y - ITEM_TOP_MARGIN;
height = height + ITEM_TOP_MARGIN + ITEM_BOTTOM_MARGIN;
}
break;
}
return new Rectangle(x, y, width, height);
}
void createAntialiasColors() {
disposeAntialiasColors();
lastBorderColor = parent.getDisplay().getSystemColor(BORDER1_COLOR);
RGB lineRGB = lastBorderColor.getRGB();
/* compute the selected color */
RGB innerRGB = parent.selectionBackground.getRGB();
if (parent.selectionBgImage != null ||
(parent.selectionGradientColors != null && parent.selectionGradientColors.length > 1)) {
innerRGB = null;
}
RGB outerRGB = parent.getBackground().getRGB();
if (parent.gradientColors != null && parent.gradientColors.length > 1) {
outerRGB = null;
}
if (outerRGB != null) {
RGB from = lineRGB;
RGB to = outerRGB;
int red = from.red + 2*(to.red - from.red)/3;
int green = from.green + 2*(to.green - from.green)/3;
int blue = from.blue + 2*(to.blue - from.blue)/3;
selectedOuterColor = new Color(red, green, blue);
}
if (innerRGB != null) {
RGB from = lineRGB;
RGB to = innerRGB;
int red = from.red + 2*(to.red - from.red)/3;
int green = from.green + 2*(to.green - from.green)/3;
int blue = from.blue + 2*(to.blue - from.blue)/3;
selectedInnerColor = new Color(red, green, blue);
}
/* compute the tabArea color */
outerRGB = parent.getParent().getBackground().getRGB();
if (outerRGB != null) {
RGB from = lineRGB;
RGB to = outerRGB;
int red = from.red + 2*(to.red - from.red)/3;
int green = from.green + 2*(to.green - from.green)/3;
int blue = from.blue + 2*(to.blue - from.blue)/3;
tabAreaColor = new Color(red, green, blue);
}
}
/*
* Allocate colors for the highlight line.
* Colours will be a gradual blend ranging from to.
* Blend length will be tab height.
* Recompute this if tab height changes.
* Could remain null if there'd be no gradient (start=end or low colour display)
*/
void createSelectionHighlightGradientColors(Color start) {
disposeSelectionHighlightGradientColors(); //dispose if existing
if(start == null) //shouldn't happen but just to be safe
return;
//alloc colours for entire height to ensure it matches wherever we stop drawing
int fadeGradientSize = parent.tabHeight;
RGB from = start.getRGB();
RGB to = parent.selectionBackground.getRGB();
selectionHighlightGradientColorsCache = new Color[fadeGradientSize];
int denom = fadeGradientSize - 1;
for (int i = 0; i < fadeGradientSize; i++) {
int propFrom = denom - i;
int propTo = i;
int red = (to.red * propTo + from.red * propFrom) / denom;
int green = (to.green * propTo + from.green * propFrom) / denom;
int blue = (to.blue * propTo + from.blue * propFrom) / denom;
selectionHighlightGradientColorsCache[i] = new Color(red, green, blue);
}
}
/**
* Dispose of any operating system resources associated with
* the renderer. Called by the CTabFolder parent upon receiving
* the dispose event or when changing the renderer.
*
* @since 3.6
*/
protected void dispose() {
disposeAntialiasColors();
disposeSelectionHighlightGradientColors();
fillColor = null;
if (chevronFont != null) {
chevronFont.dispose();
chevronFont = null;
}
}
void disposeAntialiasColors() {
tabAreaColor = selectedInnerColor = selectedOuterColor = null;
}
void disposeSelectionHighlightGradientColors() {
selectionHighlightGradientColorsCache = null;
}
/**
* Draw a specified part of the CTabFolder using the provided bounds and GC.
* The valid CTabFolder part constants are:
*
*
* - PART_BODY - the entire body of the CTabFolder
* - PART_HEADER - the upper tab area of the CTabFolder
* - PART_BORDER - the border of the CTabFolder
* - PART_BACKGROUND - the background of the CTabFolder
* - PART_MAX_BUTTON
* - PART_MIN_BUTTON
* - PART_CHEVRON_BUTTON
* - PART_CLOSE_BUTTON
* - A positive integer which is the index of an item in the CTabFolder.
*
*
* The state parameter may be a combination of:
*
*
* - SWT.BACKGROUND - whether the background should be drawn
* - SWT.FOREGROUND - whether the foreground should be drawn
* - SWT.SELECTED - whether the part is selected
* - SWT.HOT - whether the part is hot (i.e. mouse is over the part)
*
*
* @param part part to draw
* @param state state of the part
* @param bounds the bounds of the part
* @param gc the gc to draw the part on
*
* @since 3.6
*/
protected void draw (int part, int state, Rectangle bounds, GC gc) {
switch (part) {
case PART_BACKGROUND:
this.drawBackground(gc, bounds, state);
break;
case PART_BODY:
drawBody(gc, bounds, state);
break;
case PART_HEADER:
drawTabArea(gc, bounds, state);
break;
case PART_MAX_BUTTON:
drawMaximize(gc, bounds, state);
break;
case PART_MIN_BUTTON:
drawMinimize(gc, bounds, state);
break;
case PART_CHEVRON_BUTTON:
drawChevron(gc, bounds, state);
break;
default:
if (0 <= part && part < parent.getItemCount()) {
if (bounds.width == 0 || bounds.height == 0) return;
if ((state & SWT.SELECTED) != 0 ) {
drawSelected(part, gc, bounds, state);
} else {
drawUnselected(part, gc, bounds, state);
}
}
break;
}
}
void drawBackground(GC gc, Rectangle bounds, int state) {
boolean selected = (state & SWT.SELECTED) != 0;
Color defaultBackground = selected && parent.shouldHighlight() ? parent.selectionBackground : parent.getBackground();
Image image = selected ? parent.selectionBgImage : null;
Color[] colors = selected & parent.shouldHighlight() ? parent.selectionGradientColors : parent.gradientColors;
int[] percents = selected ? parent.selectionGradientPercents : parent.gradientPercents;
boolean vertical = selected ? parent.selectionGradientVertical : parent.gradientVertical;
drawBackground(gc, null, bounds.x, bounds.y, bounds.width, bounds.height, defaultBackground, image, colors, percents, vertical);
}
void drawBackground(GC gc, int[] shape, boolean selected) {
Color defaultBackground = selected && parent.shouldHighlight() ? parent.selectionBackground : parent.getBackground();
Image image = selected ? parent.selectionBgImage : null;
Color[] colors = selected && parent.shouldHighlight() ? parent.selectionGradientColors : parent.gradientColors;
int[] percents = selected ? parent.selectionGradientPercents : parent.gradientPercents;
boolean vertical = selected ? parent.selectionGradientVertical : parent.gradientVertical;
Point size = parent.getSize();
int width = size.x;
int height = parent.tabHeight + ((parent.getStyle() & SWT.FLAT) != 0 ? 1 : 3);
int x = 0;
int borderLeft = parent.borderVisible ? 1 : 0;
int borderTop = parent.onBottom ? borderLeft : 0;
int borderBottom = parent.onBottom ? 0 : borderLeft;
if (borderLeft > 0) {
x += 1; width -= 2;
}
int y = parent.onBottom ? size.y - borderBottom - height : borderTop;
drawBackground(gc, shape, x, y, width, height, defaultBackground, image, colors, percents, vertical);
}
void drawBackground(GC gc, int[] shape, int x, int y, int width, int height, Color defaultBackground, Image image, Color[] colors, int[] percents, boolean vertical) {
Region clipping = null, region = null;
if (shape != null) {
clipping = new Region();
gc.getClipping(clipping);
region = new Region();
region.add(shape);
region.intersect(clipping);
gc.setClipping(region);
}
if (image != null) {
// draw the background image in shape
gc.setBackground(defaultBackground);
gc.fillRectangle(x, y, width, height);
Rectangle imageRect = image.getBounds();
gc.drawImage(image, imageRect.x, imageRect.y, imageRect.width, imageRect.height, x, y, width, height);
} else if (colors != null) {
// draw gradient
if (colors.length == 1) {
Color background = colors[0] != null ? colors[0] : defaultBackground;
gc.setBackground(background);
gc.fillRectangle(x, y, width, height);
} else {
if (vertical) {
if (parent.onBottom) {
int pos = 0;
if (percents[percents.length - 1] < 100) {
pos = (100 - percents[percents.length - 1]) * height / 100;
gc.setBackground(defaultBackground);
gc.fillRectangle(x, y, width, pos);
}
Color lastColor = colors[colors.length-1];
if (lastColor == null) lastColor = defaultBackground;
for (int i = percents.length-1; i >= 0; i--) {
gc.setForeground(lastColor);
lastColor = colors[i];
if (lastColor == null) lastColor = defaultBackground;
gc.setBackground(lastColor);
int percentage = i > 0 ? percents[i] - percents[i-1] : percents[i];
int gradientHeight = percentage * height / 100;
gc.fillGradientRectangle(x, y+pos, width, gradientHeight, true);
pos += gradientHeight;
}
} else {
Color lastColor = colors[0];
if (lastColor == null) lastColor = defaultBackground;
int pos = 0;
for (int i = 0; i < percents.length; i++) {
gc.setForeground(lastColor);
lastColor = colors[i + 1];
if (lastColor == null) lastColor = defaultBackground;
gc.setBackground(lastColor);
int percentage = i > 0 ? percents[i] - percents[i-1] : percents[i];
int gradientHeight = percentage * height / 100;
gc.fillGradientRectangle(x, y+pos, width, gradientHeight, true);
pos += gradientHeight;
}
if (pos < height) {
gc.setBackground(defaultBackground);
gc.fillRectangle(x, pos, width, height-pos+1);
}
}
} else { //horizontal gradient
y = 0;
height = parent.getSize().y;
Color lastColor = colors[0];
if (lastColor == null) lastColor = defaultBackground;
int pos = 0;
for (int i = 0; i < percents.length; ++i) {
gc.setForeground(lastColor);
lastColor = colors[i + 1];
if (lastColor == null) lastColor = defaultBackground;
gc.setBackground(lastColor);
int gradientWidth = (percents[i] * width / 100) - pos;
gc.fillGradientRectangle(x+pos, y, gradientWidth, height, false);
pos += gradientWidth;
}
if (pos < width) {
gc.setBackground(defaultBackground);
gc.fillRectangle(x+pos, y, width-pos, height);
}
}
}
} else {
// draw a solid background using default background in shape
if ((parent.getStyle() & SWT.NO_BACKGROUND) != 0 || !defaultBackground.equals(parent.getBackground())) {
gc.setBackground(defaultBackground);
gc.fillRectangle(x, y, width, height);
}
}
if (shape != null) {
gc.setClipping(clipping);
clipping.dispose();
region.dispose();
}
}
/*
* Draw the border of the tab
*/
void drawBorder(GC gc, int[] shape) {
gc.setForeground(parent.getDisplay().getSystemColor(BORDER1_COLOR));
gc.drawPolyline(shape);
}
void drawBody(GC gc, Rectangle bounds, int state) {
Point size = new Point(bounds.width, bounds.height);
int selectedIndex = parent.selectedIndex;
int tabHeight = parent.tabHeight;
int borderLeft = parent.borderVisible ? 1 : 0;
int borderRight = borderLeft;
int borderTop = parent.onBottom ? borderLeft : 0;
int borderBottom = parent.onBottom ? 0 : borderLeft;
int style = parent.getStyle();
int highlight_header = (style & SWT.FLAT) != 0 ? 1 : 3;
int highlight_margin = (style & SWT.FLAT) != 0 ? 0 : 2;
// fill in body
if (!parent.minimized){
int width = size.x - borderLeft - borderRight - 2*highlight_margin;
int height = size.y - borderTop - borderBottom - tabHeight - highlight_header - highlight_margin;
// Draw highlight margin
if (highlight_margin > 0) {
int[] shape = null;
if (parent.onBottom) {
int x1 = borderLeft;
int y1 = borderTop;
int x2 = size.x - borderRight;
int y2 = size.y - borderBottom - tabHeight - highlight_header;
shape = new int[] {x1,y1, x2,y1, x2,y2, x2-highlight_margin,y2,
x2-highlight_margin, y1+highlight_margin, x1+highlight_margin,y1+highlight_margin,
x1+highlight_margin,y2, x1,y2};
} else {
int x1 = borderLeft;
int y1 = borderTop + tabHeight + highlight_header;
int x2 = size.x - borderRight;
int y2 = size.y - borderBottom;
shape = new int[] {x1,y1, x1+highlight_margin,y1, x1+highlight_margin,y2-highlight_margin,
x2-highlight_margin,y2-highlight_margin, x2-highlight_margin,y1,
x2,y1, x2,y2, x1,y2};
}
// If horizontal gradient, show gradient across the whole area
if (selectedIndex != -1 && parent.selectionGradientColors != null && parent.selectionGradientColors.length > 1 && !parent.selectionGradientVertical) {
drawBackground(gc, shape, true);
} else if (selectedIndex == -1 && parent.gradientColors != null && parent.gradientColors.length > 1 && !parent.gradientVertical) {
drawBackground(gc, shape, false);
} else {
gc.setBackground(selectedIndex != -1 && parent.shouldHighlight() ? parent.selectionBackground : parent.getBackground());
gc.fillPolygon(shape);
}
}
//Draw client area
if ((parent.getStyle() & SWT.NO_BACKGROUND) != 0) {
gc.setBackground(parent.getBackground());
int marginWidth = parent.marginWidth;
int marginHeight = parent.marginHeight;
int xClient = borderLeft + marginWidth + highlight_margin, yClient;
if (parent.onBottom) {
yClient = borderTop + highlight_margin + marginHeight;
} else {
yClient = borderTop + tabHeight + highlight_header + marginHeight;
}
gc.fillRectangle(xClient - marginWidth, yClient - marginHeight, width, height);
}
} else {
if ((parent.getStyle() & SWT.NO_BACKGROUND) != 0) {
int height = borderTop + tabHeight + highlight_header + borderBottom;
if (size.y > height) {
gc.setBackground(parent.getParent().getBackground());
gc.fillRectangle(0, height, size.x, size.y - height);
}
}
}
//draw 1 pixel border around outside
if (borderLeft > 0) {
gc.setForeground(parent.getDisplay().getSystemColor(BORDER1_COLOR));
int x1 = borderLeft - 1;
int x2 = size.x - borderRight;
int y1 = parent.onBottom ? borderTop - 1 : borderTop + tabHeight;
int y2 = parent.onBottom ? size.y - tabHeight - borderBottom - 1 : size.y - borderBottom;
gc.drawLine(x1, y1, x1, y2); // left
gc.drawLine(x2, y1, x2, y2); // right
if (parent.onBottom) {
gc.drawLine(x1, y1, x2, y1); // top
} else {
gc.drawLine(x1, y2, x2, y2); // bottom
}
}
}
void drawClose(GC gc, Rectangle closeRect, int closeImageState) {
if (closeRect.width == 0 || closeRect.height == 0) return;
// draw X with length of this constant
final int lineLength = 8;
int x = closeRect.x + Math.max(1, (closeRect.width-lineLength)/2);
int y = closeRect.y + Math.max(1, (closeRect.height-lineLength)/2);
y += parent.onBottom ? -1 : 1;
int originalLineWidth = gc.getLineWidth();
Color originalForeground = gc.getForeground();
switch (closeImageState & (SWT.HOT | SWT.SELECTED | SWT.BACKGROUND)) {
case SWT.NONE: {
drawCloseLines(gc, x, y , lineLength, false);
break;
}
case SWT.HOT: {
drawCloseLines(gc, x, y , lineLength, true);
break;
}
case SWT.SELECTED: {
drawCloseLines(gc, x, y , lineLength, true);
break;
}
case SWT.BACKGROUND: {
int[] shape = new int[] {x,y, x+10,y, x+10,y+10, x,y+10};
drawBackground(gc, shape, false);
break;
}
}
gc.setLineWidth(originalLineWidth);
gc.setForeground(originalForeground);
}
private void drawCloseLines(GC gc, int x, int y, int lineLength, boolean hot) {
if (hot) {
gc.setLineWidth(gc.getLineWidth() + 2);
gc.setForeground(getFillColor());
}
gc.setLineCap(SWT.CAP_ROUND);
gc.drawLine(x, y, x + lineLength, y + lineLength);
gc.drawLine(x, y + lineLength, x + lineLength, y);
}
void drawChevron(GC gc, Rectangle chevronRect, int chevronImageState) {
if (chevronRect.width == 0 || chevronRect.height == 0) return;
// draw chevron (10x7)
Display display = parent.getDisplay();
Font font = getChevronFont(display);
int fontHeight = font.getFontData()[0].getHeight();
int indent = Math.max(2, (chevronRect.height - fontHeight - 4) /2);
int x = chevronRect.x + 2;
int y = chevronRect.y + indent;
int count = parent.getChevronCount();
String chevronString = count > 99 ? CHEVRON_ELLIPSIS : String.valueOf(count);
switch (chevronImageState & (SWT.HOT | SWT.SELECTED)) {
case SWT.NONE: {
Color chevronBorder = parent.single ? parent.getSelectionForeground() : parent.getForeground();
gc.setForeground(chevronBorder);
gc.setFont(font);
drawChevronContent(gc, x, y, chevronString);
break;
}
case SWT.HOT: {
gc.setForeground(display.getSystemColor(BUTTON_BORDER));
gc.setBackground(display.getSystemColor(BUTTON_FILL));
gc.setFont(font);
drawRoundRectangle(gc, chevronRect);
drawChevronContent(gc, x, y, chevronString);
break;
}
case SWT.SELECTED: {
gc.setForeground(display.getSystemColor(BUTTON_BORDER));
gc.setBackground(display.getSystemColor(BUTTON_FILL));
gc.setFont(font);
drawRoundRectangle(gc, chevronRect);
drawChevronContent(gc, x+1, y+1, chevronString);
break;
}
}
}
private void drawRoundRectangle(GC gc, Rectangle chevronRect) {
gc.fillRoundRectangle(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, 6, 6);
gc.drawRoundRectangle(chevronRect.x, chevronRect.y, chevronRect.width - 1, chevronRect.height - 1, 6, 6);
}
private void drawChevronContent(GC gc, int x, int y, String chevronString) {
gc.drawLine(x,y, x+2,y+2);
gc.drawLine(x+2,y+2, x,y+4);
gc.drawLine(x+1,y, x+3,y+2);
gc.drawLine(x+3,y+2, x+1,y+4);
gc.drawLine(x+4,y, x+6,y+2);
gc.drawLine(x+6,y+2, x+4,y+4);
gc.drawLine(x+5,y, x+7,y+2);
gc.drawLine(x+7,y+2, x+5,y+4);
gc.drawString(chevronString, x+7, y+3, true);
}
/*
* Draw a highlight effect along the left, top, and right edges of the tab.
* Only for curved tabs, on top.
* Do not draw if insufficient colors.
*/
void drawHighlight(GC gc, Rectangle bounds, int state, int rightEdge) {
//only draw for curvy tabs and only draw for top tabs
if(parent.simple || parent.onBottom)
return;
if(selectionHighlightGradientBegin == null)
return;
Color[] gradients = selectionHighlightGradientColorsCache;
if(gradients == null)
return;
int gradientsSize = gradients.length;
if(gradientsSize == 0)
return; //shouldn't happen but just to be tidy
int x = bounds.x;
int y = bounds.y;
gc.setForeground(gradients[0]);
//draw top horizontal line
gc.drawLine(
TOP_LEFT_CORNER_HILITE[0] + x + 1, //rely on fact that first pair is top/right of curve
1 + y,
rightEdge - curveIndent,
1 + y);
int[] leftHighlightCurve = TOP_LEFT_CORNER_HILITE;
int d = parent.tabHeight - topCurveHighlightEnd.length /2;
int lastX = 0;
int lastY = 0;
int lastColorIndex = 0;
//draw upper left curve highlight
for (int i = 0; i < leftHighlightCurve.length /2; i++) {
int rawX = leftHighlightCurve[i * 2];
int rawY = leftHighlightCurve[i * 2 + 1];
lastX = rawX + x;
lastY = rawY + y;
lastColorIndex = rawY - 1;
gc.setForeground(gradients[lastColorIndex]);
gc.drawPoint(lastX, lastY);
}
//draw left vertical line highlight
for(int i = lastColorIndex; i < gradientsSize; i++) {
gc.setForeground(gradients[i]);
gc.drawPoint(lastX, 1 + lastY++);
}
int rightEdgeOffset = rightEdge - curveIndent;
//draw right swoop highlight up to diagonal portion
for (int i = 0; i < topCurveHighlightStart.length /2; i++) {
int rawX = topCurveHighlightStart[i * 2];
int rawY = topCurveHighlightStart[i * 2 + 1];
lastX = rawX + rightEdgeOffset;
lastY = rawY + y;
lastColorIndex = rawY - 1;
if(lastColorIndex >= gradientsSize)
break; //can happen if tabs are unusually short and cut off the curve
gc.setForeground(gradients[lastColorIndex]);
gc.drawPoint(lastX, lastY);
}
//draw right diagonal line highlight
for(int i = lastColorIndex; i < lastColorIndex + d; i++) {
if(i >= gradientsSize)
break; //can happen if tabs are unusually short and cut off the curve
gc.setForeground(gradients[i]);
gc.drawPoint(1 + lastX++, 1 + lastY++);
}
//draw right swoop highlight from diagonal portion to end
for (int i = 0; i < topCurveHighlightEnd.length /2; i++) {
int rawX = topCurveHighlightEnd[i * 2]; //d is already encoded in this value
int rawY = topCurveHighlightEnd[i * 2 + 1]; //d already encoded
lastX = rawX + rightEdgeOffset;
lastY = rawY + y;
lastColorIndex = rawY - 1;
if(lastColorIndex >= gradientsSize)
break; //can happen if tabs are unusually short and cut off the curve
gc.setForeground(gradients[lastColorIndex]);
gc.drawPoint(lastX, lastY);
}
}
/*
* Draw the unselected border for the receiver on the left.
*/
void drawLeftUnselectedBorder(GC gc, Rectangle bounds, int state) {
int x = bounds.x;
int y = bounds.y;
int height = bounds.height;
int[] shape = null;
if (parent.onBottom) {
int[] left = parent.simple
? SIMPLE_UNSELECTED_INNER_CORNER
: BOTTOM_LEFT_CORNER;
shape = new int[left.length + 2];
int index = 0;
shape[index++] = x;
shape[index++] = y - 1;
for (int i = 0; i < left.length / 2; i++) {
shape[index++] = x + left[2 * i];
shape[index++] = y + height + left[2 * i + 1] - 1;
}
} else {
int[] left = parent.simple
? SIMPLE_UNSELECTED_INNER_CORNER
: TOP_LEFT_CORNER;
shape = new int[left.length + 2];
int index = 0;
shape[index++] = x;
shape[index++] = y + height;
for (int i = 0; i < left.length / 2; i++) {
shape[index++] = x + left[2 * i];
shape[index++] = y + left[2 * i + 1];
}
}
drawBorder(gc, shape);
}
void drawMaximize(GC gc, Rectangle maxRect, int maxImageState) {
if (maxRect.width == 0 || maxRect.height == 0) return;
// 5x4 or 7x9
int x = maxRect.x + (maxRect.width - 10)/2;
int y = maxRect.y + 3;
gc.setForeground(parent.getForeground());
switch (maxImageState & (SWT.HOT | SWT.SELECTED)) {
case SWT.NONE: {
if (!parent.getMaximized()) {
gc.drawRectangle(x, y, 9, 9);
gc.drawLine(x, y+2, x+9, y+2);
} else {
gc.drawRectangle(x, y+3, 5, 4);
gc.drawRectangle(x+2, y, 5, 4);
gc.drawLine(x+2, y+1, x+7, y+1);
gc.drawLine(x, y+4, x+5, y+4);
}
break;
}
case SWT.HOT: {
drawRoundRectangle(gc, maxRect);
if (!parent.getMaximized()) {
gc.drawRectangle(x, y, 9, 9);
gc.drawLine(x, y+2, x+9, y+2);
} else {
gc.drawRectangle(x, y+3, 5, 4);
gc.drawRectangle(x+2, y, 5, 4);
gc.drawLine(x+2, y+1, x+7, y+1);
gc.drawLine(x, y+4, x+5, y+4);
}
break;
}
case SWT.SELECTED: {
drawRoundRectangle(gc, maxRect);
if (!parent.getMaximized()) {
gc.drawRectangle(x+1, y+1, 9, 9);
gc.drawLine(x+1, y+3, x+10, y+3);
} else {
gc.drawRectangle(x+1, y+4, 5, 4);
gc.drawRectangle(x+3, y+1, 5, 4);
gc.drawLine(x+3, y+2, x+8, y+2);
gc.drawLine(x+1, y+5, x+6, y+5);
}
break;
}
}
}
void drawMinimize(GC gc, Rectangle minRect, int minImageState) {
if (minRect.width == 0 || minRect.height == 0) return;
// 5x4 or 9x3
int x = minRect.x + (minRect.width - 10)/2;
int y = minRect.y + 3;
gc.setForeground(parent.getForeground());
switch (minImageState & (SWT.HOT | SWT.SELECTED)) {
case SWT.NONE: {
if (!parent.getMinimized()) {
gc.drawRectangle(x, y, 9, 3);
} else {
gc.drawRectangle(x, y+3, 5, 4);
gc.drawRectangle(x+2, y, 5, 4);
gc.drawLine(x+3, y+1, x+6, y+1);
gc.drawLine(x+1, y+4, x+4, y+4);
}
break;
}
case SWT.HOT: {
drawRoundRectangle(gc, minRect);
if (!parent.getMinimized()) {
gc.drawRectangle(x, y, 9, 3);
} else {
gc.drawRectangle(x, y+3, 5, 4);
gc.drawRectangle(x+2, y, 5, 4);
gc.drawLine(x+3, y+1, x+6, y+1);
gc.drawLine(x+1, y+4, x+4, y+4);
}
break;
}
case SWT.SELECTED: {
drawRoundRectangle(gc, minRect);
if (!parent.getMinimized()) {
gc.drawRectangle(x+1, y+1, 9, 3);
} else {
gc.drawRectangle(x+1, y+4, 5, 4);
gc.drawRectangle(x+3, y+1, 5, 4);
gc.drawLine(x+4, y+2, x+7, y+2);
gc.drawLine(x+2, y+5, x+5, y+5);
}
break;
}
}
}
/*
* Draw the unselected border for the receiver on the right.
*/
void drawRightUnselectedBorder(GC gc, Rectangle bounds, int state) {
int x = bounds.x;
int y = bounds.y;
int width = bounds.width;
int height = bounds.height;
int[] shape = null;
int startX = x + width - 1;
if (parent.onBottom) {
int[] right = parent.simple
? SIMPLE_UNSELECTED_INNER_CORNER
: BOTTOM_RIGHT_CORNER;
shape = new int[right.length + 2];
int index = 0;
for (int i = 0; i < right.length / 2; i++) {
shape[index++] = startX + right[2 * i];
shape[index++] = y + height + right[2 * i + 1] - 1;
}
shape[index++] = startX;
shape[index++] = y - 1;
} else {
int[] right = parent.simple
? SIMPLE_UNSELECTED_INNER_CORNER
: TOP_RIGHT_CORNER;
shape = new int[right.length + 2];
int index = 0;
for (int i = 0; i < right.length / 2; i++) {
shape[index++] = startX + right[2 * i];
shape[index++] = y + right[2 * i + 1];
}
shape[index++] = startX;
shape[index++] = y + height;
}
drawBorder(gc, shape);
}
void drawSelected(int itemIndex, GC gc, Rectangle bounds, int state ) {
CTabItem item = parent.items[itemIndex];
int x = bounds.x;
int y = bounds.y;
int height = bounds.height;
int width = bounds.width;
if (!parent.simple && !parent.single) width -= (curveWidth - curveIndent);
int borderLeft = parent.borderVisible ? 1 : 0;
int borderRight = borderLeft;
int borderTop = parent.onBottom ? borderLeft : 0;
int borderBottom = parent.onBottom ? 0 : borderLeft;
Point size = parent.getSize();
int rightEdge = Math.min (x + width, parent.getRightItemEdge(gc));
// Draw selection border across all tabs
if ((state & SWT.BACKGROUND) != 0) {
int highlight_header = (parent.getStyle() & SWT.FLAT) != 0 ? 1 : 3;
int xx = borderLeft;
int yy = parent.onBottom ? size.y - borderBottom - parent.tabHeight - highlight_header : borderTop + parent.tabHeight + 1;
int ww = size.x - borderLeft - borderRight;
int hh = highlight_header - 1;
int[] shape = new int[] {xx,yy, xx+ww,yy, xx+ww,yy+hh, xx,yy+hh};
if (parent.selectionGradientColors != null && !parent.selectionGradientVertical) {
drawBackground(gc, shape, parent.shouldHighlight());
} else {
gc.setBackground(parent.shouldHighlight() ? parent.selectionBackground : parent.getBackground());
gc.fillRectangle(xx, yy, ww, hh);
}
if (parent.single) {
if (!item.showing) return;
} else {
// if selected tab scrolled out of view or partially out of view
// just draw bottom line
if (!item.showing){
int x1 = Math.max(0, borderLeft - 1);
int y1 = (parent.onBottom) ? y - 1 : y + height;
int x2 = size.x - borderRight;
gc.setForeground(parent.getDisplay().getSystemColor(BORDER1_COLOR));
gc.drawLine(x1, y1, x2, y1);
return;
}
// draw selected tab background and outline
shape = null;
if (parent.onBottom) {
int[] left = parent.simple ? SIMPLE_BOTTOM_LEFT_CORNER : BOTTOM_LEFT_CORNER;
int[] right = parent.simple ? SIMPLE_BOTTOM_RIGHT_CORNER : curve;
if (borderLeft == 0 && itemIndex == parent.firstIndex) {
left = new int[]{x, y+height};
}
shape = new int[left.length+right.length+8];
int index = 0;
shape[index++] = x; // first point repeated here because below we reuse shape to draw outline
shape[index++] = y - 1;
shape[index++] = x;
shape[index++] = y - 1;
for (int i = 0; i < left.length/2; i++) {
shape[index++] = x + left[2*i];
shape[index++] = y + height + left[2*i+1] - 1;
}
for (int i = 0; i < right.length/2; i++) {
shape[index++] = parent.simple ? rightEdge - 1 + right[2*i] : rightEdge - curveIndent + right[2*i];
shape[index++] = parent.simple ? y + height + right[2*i+1] - 1 : y + right[2*i+1] - 2;
}
shape[index++] = parent.simple ? rightEdge - 1 : rightEdge + curveWidth - curveIndent;
shape[index++] = y - 1;
shape[index++] = parent.simple ? rightEdge - 1 : rightEdge + curveWidth - curveIndent;
shape[index++] = y - 1;
} else {
int[] left = parent.simple ? SIMPLE_TOP_LEFT_CORNER : TOP_LEFT_CORNER;
int[] right = parent.simple ? SIMPLE_TOP_RIGHT_CORNER : curve;
if (borderLeft == 0 && itemIndex == parent.firstIndex) {
left = new int[]{x, y};
}
shape = new int[left.length+right.length+8];
int index = 0;
shape[index++] = x; // first point repeated here because below we reuse shape to draw outline
shape[index++] = y + height + 1;
shape[index++] = x;
shape[index++] = y + height + 1;
for (int i = 0; i < left.length/2; i++) {
shape[index++] = x + left[2*i];
shape[index++] = y + left[2*i+1];
}
for (int i = 0; i < right.length/2; i++) {
shape[index++] = parent.simple ? rightEdge - 1 + right[2*i] : rightEdge - curveIndent + right[2*i];
shape[index++] = y + right[2*i+1];
}
shape[index++] = parent.simple ? rightEdge - 1 : rightEdge + curveWidth - curveIndent;
shape[index++] = y + height + 1;
shape[index++] = parent.simple ? rightEdge - 1 : rightEdge + curveWidth - curveIndent;
shape[index++] = y + height + 1;
}
Rectangle clipping = gc.getClipping();
Rectangle clipBounds = item.getBounds();
clipBounds.height += 1;
if (parent.onBottom) clipBounds.y -= 1;
boolean tabInPaint = clipping.intersects(clipBounds);
if (tabInPaint) {
// fill in tab background
if (parent.selectionGradientColors != null && !parent.selectionGradientVertical) {
drawBackground(gc, shape, true);
} else {
Color defaultBackground = parent.shouldHighlight() ? parent.selectionBackground : parent.getBackground();
Image image = parent.selectionBgImage;
Color[] colors = parent.selectionGradientColors;
int[] percents = parent.selectionGradientPercents;
boolean vertical = parent.selectionGradientVertical;
xx = x;
yy = parent.onBottom ? y -1 : y + 1;
ww = width;
hh = height;
if (!parent.single && !parent.simple) ww += curveWidth - curveIndent;
drawBackground(gc, shape, xx, yy, ww, hh, defaultBackground, image, colors, percents, vertical);
}
}
//Highlight colors MUST be drawn before the outline so that outline can cover it in the right spots (start of swoop)
//otherwise the curve looks jagged
drawHighlight(gc, bounds, state, rightEdge);
// draw highlight marker of selected tab
if (parent.selectionHighlightBarThickness > 0 && parent.simple) {
Color previousColor = gc.getBackground();
gc.setBackground(item.getDisplay().getSystemColor(parent.shouldHighlight() ? SWT.COLOR_LIST_SELECTION : SWT.COLOR_WIDGET_DISABLED_FOREGROUND));
gc.fillRectangle(x + 1 /* outline */, parent.onBottom ? y + height - 1 - parent.selectionHighlightBarThickness : y + 1, width - 2 /*outline*/, parent.selectionHighlightBarThickness);
gc.setBackground(previousColor);
}
// draw outline
shape[0] = Math.max(0, borderLeft - 1);
if (borderLeft == 0 && itemIndex == parent.firstIndex) {
shape[1] = parent.onBottom ? y + height - 1 : y;
shape[5] = shape[3] = shape[1];
}
shape[shape.length - 2] = size.x - borderRight + 1;
for (int i = 0; i < shape.length/2; i++) {
if (shape[2*i + 1] == y + height + 1) shape[2*i + 1] -= 1;
}
Color borderColor = parent.getDisplay().getSystemColor(BORDER1_COLOR);
if (! borderColor.equals(lastBorderColor)) createAntialiasColors();
antialias(shape, selectedInnerColor, selectedOuterColor, gc);
gc.setForeground(borderColor);
gc.drawPolyline(shape);
if (!tabInPaint) return;
}
}
if ((state & SWT.FOREGROUND) != 0) {
// draw Image
Rectangle trim = computeTrim(itemIndex, SWT.NONE, 0, 0, 0, 0);
int xDraw = x - trim.x;
if (parent.single && shouldDrawCloseIcon(item)) xDraw += item.closeRect.width;
Image image = item.getImage();
if (image != null && !image.isDisposed() && parent.showSelectedImage) {
Rectangle imageBounds = image.getBounds();
// only draw image if it won't overlap with close button
int maxImageWidth = rightEdge - xDraw - (trim.width + trim.x);
if (!parent.single && item.closeRect.width > 0) maxImageWidth -= item.closeRect.width + INTERNAL_SPACING;
if (imageBounds.width < maxImageWidth) {
int imageX = xDraw;
int imageY = y + (height - imageBounds.height) / 2;
imageY += parent.onBottom ? -1 : 1;
gc.drawImage(image, imageX, imageY);
xDraw += imageBounds.width + INTERNAL_SPACING;
}
}
// draw Text
xDraw += getLeftTextMargin(item);
int textWidth = rightEdge - xDraw - (trim.width + trim.x);
if (!parent.single && item.closeRect.width > 0) textWidth -= item.closeRect.width + INTERNAL_SPACING;
if (textWidth > 0) {
Font gcFont = gc.getFont();
gc.setFont(item.font == null ? parent.getFont() : item.font);
if (item.shortenedText == null || item.shortenedTextWidth != textWidth) {
item.shortenedText = shortenText(gc, item.getText(), textWidth);
item.shortenedTextWidth = textWidth;
}
Point extent = gc.textExtent(item.shortenedText, FLAGS);
int textY = y + (height - extent.y) / 2;
textY += parent.onBottom ? -1 : 1;
gc.setForeground(item.selectionForeground == null ? parent.getSelectionForeground() : item.selectionForeground);
gc.drawText(item.shortenedText, xDraw, textY, FLAGS);
gc.setFont(gcFont);
// draw a Focus rectangle
if (parent.isFocusControl()) {
Color orginalForeground = gc.getForeground();
Color orginalBackground = gc.getBackground();
Display display = parent.getDisplay();
if (parent.simple || parent.single) {
gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.drawFocus(xDraw-1, textY-1, extent.x+2, extent.y+2);
} else {
gc.setForeground(display.getSystemColor(BUTTON_BORDER));
gc.drawLine(xDraw, textY+extent.y+1, xDraw+extent.x+1, textY+extent.y+1);
}
gc.setForeground(orginalForeground);
gc.setBackground(orginalBackground);
}
}
if (shouldDrawCloseIcon(item)) drawClose(gc, item.closeRect, item.closeImageState);
}
}
private int getLeftTextMargin(CTabItem item) {
int margin = 0;
if (shouldApplyLargeTextPadding(parent)) {
margin += getLargeTextPadding(item);
if (shouldDrawCloseIcon(item)) {
margin -= item.closeRect.width / 2;
}
}
return margin;
}
void drawTabArea(GC gc, Rectangle bounds, int state) {
Point size = parent.getSize();
int[] shape = null;
Color borderColor = parent.getDisplay().getSystemColor(BORDER1_COLOR);
int tabHeight = parent.tabHeight;
int style = parent.getStyle();
int borderLeft = parent.borderVisible ? 1 : 0;
int borderRight = borderLeft;
int borderTop = parent.onBottom ? borderLeft : 0;
int borderBottom = parent.onBottom ? 0 : borderLeft;
int selectedIndex = parent.selectedIndex;
int highlight_header = (style & SWT.FLAT) != 0 ? 1 : 3;
if (tabHeight == 0) {
if ((style & SWT.FLAT) != 0 && (style & SWT.BORDER) == 0) return;
int x1 = borderLeft - 1;
int x2 = size.x - borderRight;
int y1 = parent.onBottom ? size.y - borderBottom - highlight_header - 1 : borderTop + highlight_header;
int y2 = parent.onBottom ? size.y - borderBottom : borderTop;
if (borderLeft > 0 && parent.onBottom) y2 -= 1;
shape = new int[] {x1, y1, x1,y2, x2,y2, x2,y1};
// If horizontal gradient, show gradient across the whole area
if (selectedIndex != -1 && parent.selectionGradientColors != null && parent.selectionGradientColors.length > 1 && !parent.selectionGradientVertical) {
drawBackground(gc, shape, true);
} else if (selectedIndex == -1 && parent.gradientColors != null && parent.gradientColors.length > 1 && !parent.gradientVertical) {
drawBackground(gc, shape, false);
} else {
gc.setBackground(selectedIndex != -1 && parent.shouldHighlight() ? parent.selectionBackground : parent.getBackground());
gc.fillPolygon(shape);
}
//draw 1 pixel border
if (borderLeft > 0) {
gc.setForeground(borderColor);
gc.drawPolyline(shape);
}
return;
}
int x = Math.max(0, borderLeft - 1);
int y = parent.onBottom ? size.y - borderBottom - tabHeight : borderTop;
int width = size.x - borderLeft - borderRight + 1;
int height = tabHeight - 1;
boolean simple = parent.simple;
// Draw Tab Header
if (parent.onBottom) {
int[] left, right;
if ((style & SWT.BORDER) != 0) {
left = simple ? SIMPLE_BOTTOM_LEFT_CORNER : BOTTOM_LEFT_CORNER;
right = simple ? SIMPLE_BOTTOM_RIGHT_CORNER : BOTTOM_RIGHT_CORNER;
} else {
left = simple ? SIMPLE_BOTTOM_LEFT_CORNER_BORDERLESS : BOTTOM_LEFT_CORNER_BORDERLESS;
right = simple ? SIMPLE_BOTTOM_RIGHT_CORNER_BORDERLESS : BOTTOM_RIGHT_CORNER_BORDERLESS;
}
shape = new int[left.length + right.length + 4];
int index = 0;
shape[index++] = x;
shape[index++] = y-highlight_header;
for (int i = 0; i < left.length/2; i++) {
shape[index++] = x+left[2*i];
shape[index++] = y+height+left[2*i+1];
if (borderLeft == 0) shape[index-1] += 1;
}
for (int i = 0; i < right.length/2; i++) {
shape[index++] = x+width+right[2*i];
shape[index++] = y+height+right[2*i+1];
if (borderLeft == 0) shape[index-1] += 1;
}
shape[index++] = x+width;
shape[index++] = y-highlight_header;
} else {
int[] left, right;
if ((style & SWT.BORDER) != 0) {
left = simple ? SIMPLE_TOP_LEFT_CORNER : TOP_LEFT_CORNER;
right = simple ? SIMPLE_TOP_RIGHT_CORNER : TOP_RIGHT_CORNER;
} else {
left = simple ? SIMPLE_TOP_LEFT_CORNER_BORDERLESS : TOP_LEFT_CORNER_BORDERLESS;
right = simple ? SIMPLE_TOP_RIGHT_CORNER_BORDERLESS : TOP_RIGHT_CORNER_BORDERLESS;
}
shape = new int[left.length + right.length + 4];
int index = 0;
shape[index++] = x;
shape[index++] = y+height+highlight_header + 1;
for (int i = 0; i < left.length/2; i++) {
shape[index++] = x+left[2*i];
shape[index++] = y+left[2*i+1];
}
for (int i = 0; i < right.length/2; i++) {
shape[index++] = x+width+right[2*i];
shape[index++] = y+right[2*i+1];
}
shape[index++] = x+width;
shape[index++] = y+height+highlight_header + 1;
}
// Fill in background
boolean single = parent.single;
boolean bkSelected = single && selectedIndex != -1;
drawBackground(gc, shape, bkSelected);
// Fill in parent background for non-rectangular shape
Region r = new Region();
r.add(new Rectangle(x, y, width + 1, height + 1));
r.subtract(shape);
gc.setBackground(parent.getParent().getBackground());
fillRegion(gc, r);
r.dispose();
// Draw selected tab
if (selectedIndex == -1) {
// if no selected tab - draw line across bottom of all tabs
int x1 = borderLeft;
int y1 = (parent.onBottom) ? size.y - borderBottom - tabHeight - 1 : borderTop + tabHeight;
int x2 = size.x - borderRight;
gc.setForeground(borderColor);
gc.drawLine(x1, y1, x2, y1);
}
// Draw border line
if (borderLeft > 0) {
if (! borderColor.equals(lastBorderColor)) createAntialiasColors();
antialias(shape, null, tabAreaColor, gc);
gc.setForeground(borderColor);
gc.drawPolyline(shape);
}
}
void drawUnselected(int index, GC gc, Rectangle bounds, int state) {
CTabItem item = parent.items[index];
int x = bounds.x;
int y = bounds.y;
int height = bounds.height;
int width = bounds.width;
// Do not draw partial items
if (!item.showing) return;
Rectangle clipping = gc.getClipping();
if (!clipping.intersects(bounds)) return;
if ((state & SWT.BACKGROUND) != 0) {
if (index > 0 && index < parent.selectedIndex)
drawLeftUnselectedBorder(gc, bounds, state);
// If it is the last one then draw a line
if (index > parent.selectedIndex)
drawRightUnselectedBorder(gc, bounds, state);
}
if ((state & SWT.FOREGROUND) != 0) {
// draw Image
Rectangle trim = computeTrim(index, SWT.NONE, 0, 0, 0, 0);
int xDraw = x - trim.x;
Image image = item.getImage();
if (image != null && !image.isDisposed() && parent.showUnselectedImage) {
Rectangle imageBounds = image.getBounds();
// only draw image if it won't overlap with close button
int maxImageWidth = x + width - xDraw - (trim.width + trim.x);
if (shouldDrawCloseIcon(item)) {
maxImageWidth -= item.closeRect.width + INTERNAL_SPACING;
}
if (imageBounds.width < maxImageWidth) {
int imageX = xDraw;
int imageHeight = imageBounds.height;
int imageY = y + (height - imageHeight) / 2;
imageY += parent.onBottom ? -1 : 1;
int imageWidth = imageBounds.width * imageHeight / imageBounds.height;
gc.drawImage(image,
imageBounds.x, imageBounds.y, imageBounds.width, imageBounds.height,
imageX, imageY, imageWidth, imageHeight);
xDraw += imageWidth + INTERNAL_SPACING;
}
}
// draw Text
xDraw += getLeftTextMargin(item);
int textWidth = x + width - xDraw - (trim.width + trim.x);
if (shouldDrawCloseIcon(item)) {
textWidth -= item.closeRect.width + INTERNAL_SPACING;
}
if (textWidth > 0) {
Font gcFont = gc.getFont();
gc.setFont(item.font == null ? parent.getFont() : item.font);
if (item.shortenedText == null || item.shortenedTextWidth != textWidth) {
item.shortenedText = shortenText(gc, item.getText(), textWidth);
item.shortenedTextWidth = textWidth;
}
Point extent = gc.textExtent(item.shortenedText, FLAGS);
int textY = y + (height - extent.y) / 2;
textY += parent.onBottom ? -1 : 1;
gc.setForeground(item.foreground == null ? parent.getForeground() : item.foreground);
gc.drawText(item.shortenedText, xDraw, textY, FLAGS);
gc.setFont(gcFont);
}
// draw close
if (shouldDrawCloseIcon(item)) drawClose(gc, item.closeRect, item.closeImageState);
}
}
void fillRegion(GC gc, Region region) {
// NOTE: region passed in to this function will be modified
Region clipping = new Region();
gc.getClipping(clipping);
region.intersect(clipping);
gc.setClipping(region);
gc.fillRectangle(region.getBounds());
gc.setClipping(clipping);
clipping.dispose();
}
Color getFillColor() {
if (fillColor == null) {
fillColor = new Color(CLOSE_FILL);
}
return fillColor;
}
private Font getChevronFont(Display display) {
if (chevronFont == null) {
Point dpi = display.getDPI();
int fontHeight = 72 * CHEVRON_FONT_HEIGHT / dpi.y;
FontData fd = parent.getFont().getFontData()[0];
fd.setHeight(fontHeight);
chevronFont = new Font(display, fd);
}
return chevronFont;
}
/*
* Return true if given start color, the cache of highlight colors we have
* would match the highlight colors we'd compute.
*/
boolean isSelectionHighlightColorsCacheHit(Color start) {
if(selectionHighlightGradientColorsCache == null)
return false;
//this case should never happen but check to be safe before accessing array indexes
if(selectionHighlightGradientColorsCache.length < 2)
return false;
Color highlightBegin = selectionHighlightGradientColorsCache[0];
Color highlightEnd = selectionHighlightGradientColorsCache[selectionHighlightGradientColorsCache.length - 1];
if(! highlightBegin.equals(start))
return false;
//Compare number of colours we have vs. we'd compute
if(selectionHighlightGradientColorsCache.length != parent.tabHeight)
return false;
//Compare existing highlight end to what it would be (selectionBackground)
if(! highlightEnd.equals(parent.selectionBackground))
return false;
return true;
}
void resetChevronFont() {
if (chevronFont != null) {
chevronFont.dispose();
chevronFont = null;
}
}
void setSelectionHighlightGradientColor(Color start) {
//
//Set to null to match all the early return cases.
//For early returns, don't realloc the cache, we may get a cache hit next time we're given the highlight
selectionHighlightGradientBegin = null;
if(start == null)
return;
//don't bother on low colour
if (parent.getDisplay().getDepth() < 15)
return;
//don't bother if we don't have a background gradient
if(parent.selectionGradientColors.length < 2)
return;
//OK we know its a valid gradient now
selectionHighlightGradientBegin = start;
if(! isSelectionHighlightColorsCacheHit(start))
createSelectionHighlightGradientColors(start); //if no cache hit then compute new ones
}
String shortenText(GC gc, String text, int width) {
return useEllipses()
? shortenText(gc, text, width, ELLIPSIS)
: shortenText(gc, text, width, ""); //$NON-NLS-1$
}
String shortenText(GC gc, String text, int width, String ellipses) {
if (gc.textExtent(text, FLAGS).x <= width) return text;
int ellipseWidth = gc.textExtent(ellipses, FLAGS).x;
int length = text.length();
TextLayout layout = new TextLayout(parent.getDisplay());
layout.setText(text);
int end = layout.getPreviousOffset(length, SWT.MOVEMENT_CLUSTER);
while (end > 0) {
text = text.substring(0, end);
int l = gc.textExtent(text, FLAGS).x;
if (l + ellipseWidth <= width) {
break;
}
end = layout.getPreviousOffset(end, SWT.MOVEMENT_CLUSTER);
}
layout.dispose();
return end == 0 ? text.substring(0, 1) : text + ellipses;
}
void updateCurves () {
//Temp fix for Bug 384743
if (this.getClass().getName().equals("org.eclipse.e4.ui.workbench.renderers.swt.CTabRendering")) return;
int tabHeight = parent.tabHeight;
if (tabHeight == lastTabHeight) return;
lastTabHeight = tabHeight;
if (parent.onBottom) {
int d = tabHeight - 12;
curve = new int[]{0,13+d, 0,12+d, 2,12+d, 3,11+d, 5,11+d, 6,10+d, 7,10+d, 9,8+d, 10,8+d,
11,7+d, 11+d,7,
12+d,6, 13+d,6, 15+d,4, 16+d,4, 17+d,3, 19+d,3, 20+d,2, 22+d,2, 23+d,1};
curveWidth = 26+d;
curveIndent = curveWidth/3;
} else {
int d = tabHeight - 12;
curve = new int[]{0,0, 0,1, 2,1, 3,2, 5,2, 6,3, 7,3, 9,5, 10,5,
11,6, 11+d,6+d,
12+d,7+d, 13+d,7+d, 15+d,9+d, 16+d,9+d, 17+d,10+d, 19+d,10+d, 20+d,11+d, 22+d,11+d, 23+d,12+d};
curveWidth = 26+d;
curveIndent = curveWidth/3;
//this could be static but since values depend on curve, better to keep in one place
topCurveHighlightStart = new int[] {
0, 2, 1, 2, 2, 2,
3, 3, 4, 3, 5, 3,
6, 4, 7, 4,
8, 5,
9, 6, 10, 6};
//also, by adding in 'd' here we save some math cost when drawing the curve
topCurveHighlightEnd = new int[] {
10+d, 6+d,
11+d, 7+d,
12+d, 8+d, 13+d, 8+d,
14+d, 9+d,
15+d, 10+d, 16+d, 10+d,
17+d, 11+d, 18+d, 11+d, 19+d, 11+d,
20+d, 12+d, 21+d, 12+d, 22+d, 12+d };
}
}
/*
* Return whether to use ellipses or just truncate labels
*/
boolean useEllipses() {
return parent.simple;
}
}