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/*******************************************************************************
* 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;
}
}
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