org.apache.pivot.wtk.skin.terra.TerraScrollBarSkin Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pivot.wtk.skin.terra;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.GeneralPath;
import org.apache.pivot.wtk.ApplicationContext;
import org.apache.pivot.wtk.Component;
import org.apache.pivot.wtk.Dimensions;
import org.apache.pivot.wtk.GraphicsUtilities;
import org.apache.pivot.wtk.Mouse;
import org.apache.pivot.wtk.Orientation;
import org.apache.pivot.wtk.ScrollBar;
import org.apache.pivot.wtk.ScrollBarListener;
import org.apache.pivot.wtk.ScrollBarValueListener;
import org.apache.pivot.wtk.Theme;
import org.apache.pivot.wtk.media.Image;
import org.apache.pivot.wtk.skin.ComponentSkin;
import org.apache.pivot.wtk.skin.ContainerSkin;
/**
* Scroll bar skin.
*/
public class TerraScrollBarSkin extends ContainerSkin
implements ScrollBarListener, ScrollBarValueListener {
/**
* Encapsulates the code needed to perform timer-controlled scrolling. This
* class is used by TerraScrollBarSkin (automatic block increment
* scrolling) and ScrollButtonSkin (automatic unit increment
* scrolling).
*/
protected class AutomaticScroller {
public int direction;
public Mouse.ScrollType incrementType;
public int stopValue;
private ApplicationContext.ScheduledCallback scheduledScrollCallback = null;
/**
* Starts scrolling this skin's scroll bar, stopping the scroll when
* the specified value has been reached.
*
* @param direction
* 1 to adjust the scroll bar's value larger; -1 to
* adjust it smaller
*
* @param incrementType
* Determines whether we'll use the scroll bar's unit increment or the
* block increment when scrolling
*
* @param stopValue
* The value which, once reached, will stop the automatic scrolling.
* Use -1 to specify no stop value
*
* @exception IllegalStateException
* If automatic scrolling of any scroll bar is already in progress.
* Only one scroll bar may be automatically scrolled at one time
*/
public void start(int direction, Mouse.ScrollType incrementType, int stopValue) {
if (scheduledScrollCallback != null) {
throw new IllegalStateException("Already running");
}
this.direction = direction;
this.incrementType = incrementType;
this.stopValue = stopValue;
// Wait a timeout period, then begin rapidly scrolling
scheduledScrollCallback = ApplicationContext.scheduleRecurringCallback(new Runnable() {
@Override
public void run() {
scroll();
}
}, 400, 30);
// We initially scroll once to register that we've started
scroll();
}
/**
* Stops any automatic scrolling in progress.
*/
public void stop() {
if (scheduledScrollCallback != null) {
scheduledScrollCallback.cancel();
scheduledScrollCallback = null;
}
}
private void scroll() {
ScrollBar scrollBar = (ScrollBar)TerraScrollBarSkin.this.getComponent();
int start = scrollBar.getStart();
int end = scrollBar.getEnd();
int extent = scrollBar.getExtent();
int value = scrollBar.getValue();
int adjustment;
if (incrementType == Mouse.ScrollType.UNIT) {
adjustment = direction * scrollBar.getUnitIncrement();
} else {
adjustment = direction * scrollBar.getBlockIncrement();
}
if (adjustment < 0) {
int newValue = Math.max(value + adjustment, start);
scrollBar.setValue(newValue);
if (stopValue != -1
&& newValue < stopValue) {
// We've reached the explicit stop value
stop();
}
if (newValue == start) {
// We implicit stop at the minimum scroll bar value
stop();
}
} else {
int newValue = Math.min(value + adjustment, end - extent);
scrollBar.setValue(newValue);
if (stopValue != -1
&& newValue > stopValue) {
// We've reached the explicit stop value
stop();
}
if (newValue == end - extent) {
// We implicitly stop at the maximum scroll bar value
stop();
}
}
}
}
/**
* Scroll bar scroll button component.
*/
protected class ScrollButton extends Component {
private int direction;
private ScrollButtonImage buttonImage;
public ScrollButton(int direction, ScrollButtonImage buttonImage) {
this.direction = direction;
this.buttonImage = buttonImage;
setSkin(new ScrollButtonSkin());
}
public int getDirection() {
return direction;
}
public ScrollButtonImage getButtonImage() {
return buttonImage;
}
}
/**
* Scroll bar scroll button component skin.
*/
protected class ScrollButtonSkin extends ComponentSkin {
private boolean highlighted = false;
private boolean pressed = false;
@Override
public boolean isFocusable() {
return false;
}
@Override
public int getPreferredWidth(int height) {
return 15;
}
@Override
public int getPreferredHeight(int width) {
return 15;
}
@Override
public void layout() {
// No-op
}
@Override
public void paint(Graphics2D graphics) {
// Apply scroll bar styles to the button
ScrollButton scrollButton = (ScrollButton)getComponent();
ScrollBar scrollBar = (ScrollBar)TerraScrollBarSkin.this.getComponent();
Orientation orientation = scrollBar.getOrientation();
int width = getWidth();
int height = getHeight();
Color backgroundColor;
if (scrollButton.isEnabled()) {
if (pressed) {
backgroundColor = scrollButtonPressedBackgroundColor;
} else if (highlighted) {
backgroundColor = scrollButtonHighlightedBackgroundColor;
} else {
backgroundColor = scrollButtonBackgroundColor;
}
} else {
backgroundColor = scrollButtonDisabledBackgroundColor;
}
Color brightBackgroundColor = TerraTheme.brighten(backgroundColor);
// Paint the background
Color gradientStartColor = pressed ? backgroundColor : brightBackgroundColor;
Color gradientEndColor = pressed ? brightBackgroundColor : backgroundColor;
if (orientation == Orientation.HORIZONTAL) {
graphics.setPaint(new GradientPaint(0, 1, gradientStartColor,
0, height - 2, gradientEndColor));
} else {
graphics.setPaint(new GradientPaint(1, 0, gradientStartColor,
width - 2, 0, gradientEndColor));
}
graphics.fillRect(1, 1, width - 2, height - 2);
// Paint the border
graphics.setPaint(borderColor);
GraphicsUtilities.drawRect(graphics, 0, 0, width, height);
// Determine the button image size
ScrollButtonImage buttonImage = scrollButton.getButtonImage();
int buttonImageWidth = buttonImage.getWidth();
int buttonImageHeight = buttonImage.getHeight();
// Paint the image
Graphics2D imageGraphics = (Graphics2D)graphics.create();
int buttonImageX = (width - buttonImageWidth) / 2;
int buttonImageY = (height - buttonImageHeight) / 2;
imageGraphics.translate(buttonImageX, buttonImageY);
imageGraphics.clipRect(0, 0, buttonImageWidth, buttonImageHeight);
buttonImage.paint(imageGraphics);
imageGraphics.dispose();
}
@Override
public void enabledChanged(Component component) {
super.enabledChanged(component);
automaticScroller.stop();
pressed = false;
highlighted = false;
repaintComponent();
}
@Override
public void mouseOver(Component component) {
super.mouseOver(component);
highlighted = true;
repaintComponent();
}
@Override
public void mouseOut(Component component) {
super.mouseOut(component);
automaticScroller.stop();
pressed = false;
highlighted = false;
repaintComponent();
}
@Override
public boolean mouseDown(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseDown(component, button, x, y);
if (button == Mouse.Button.LEFT) {
ScrollButton scrollButton = (ScrollButton)getComponent();
// Start the automatic scroller. It'll be stopped when we
// mouse up or mouse out
automaticScroller.start(scrollButton.getDirection(), Mouse.ScrollType.UNIT, -1);
pressed = true;
repaintComponent();
consumed = true;
}
return consumed;
}
@Override
public boolean mouseUp(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseUp(component, button, x, y);
if (button == Mouse.Button.LEFT) {
automaticScroller.stop();
pressed = false;
repaintComponent();
}
return consumed;
}
}
protected abstract class ScrollButtonImage extends Image {
@Override
public int getWidth() {
ScrollBar scrollBar = (ScrollBar)getComponent();
Orientation orientation = scrollBar.getOrientation();
return (orientation == Orientation.HORIZONTAL ? 5 : 7);
}
@Override
public int getHeight() {
ScrollBar scrollBar = (ScrollBar)getComponent();
Orientation orientation = scrollBar.getOrientation();
return (orientation == Orientation.HORIZONTAL ? 7 : 5);
}
}
protected class ScrollUpImage extends ScrollButtonImage {
@Override
public void paint(Graphics2D graphics) {
ScrollBar scrollBar = (ScrollBar)getComponent();
int width = getWidth();
int height = getHeight();
graphics.setPaint(scrollButtonImageColor);
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
GeneralPath arrow = new GeneralPath(GeneralPath.WIND_EVEN_ODD);
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
arrow.moveTo(width + 0.5f, 0);
arrow.lineTo(0, height / 2.0f);
arrow.lineTo(width + 0.5f, height);
} else {
arrow.moveTo(0, height + 0.5f);
arrow.lineTo(width / 2.0f, 0);
arrow.lineTo(width, height + 0.5f);
}
arrow.closePath();
// TODO Use Graphics#fillPolygon() as optimization?
graphics.fill(arrow);
}
}
protected class ScrollDownImage extends ScrollButtonImage {
@Override
public void paint(Graphics2D graphics) {
ScrollBar scrollBar = (ScrollBar)getComponent();
int width = getWidth();
int height = getHeight();
graphics.setPaint(scrollButtonImageColor);
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
GeneralPath arrow = new GeneralPath(GeneralPath.WIND_EVEN_ODD);
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
arrow.moveTo(0, 0);
arrow.lineTo(width + 0.5f, height / 2.0f);
arrow.lineTo(0, height);
} else {
arrow.moveTo(0, 0);
arrow.lineTo(width / 2.0f, height + 0.5f);
arrow.lineTo(width, 0);
}
arrow.closePath();
// TODO Use Graphics#fillPolygon() as optimization?
graphics.fill(arrow);
}
}
/**
* Scroll bar handle component.
*/
protected class Handle extends Component {
public Handle() {
setSkin(new HandleSkin());
}
}
/**
* Scroll bar scroll handle component skin.
*/
protected class HandleSkin extends ComponentSkin {
private int dragOffset;
private boolean highlighted = false;
@Override
public boolean isFocusable() {
return false;
}
@Override
public int getPreferredWidth(int height) {
throw new UnsupportedOperationException();
}
@Override
public int getPreferredHeight(int width) {
throw new UnsupportedOperationException();
}
@Override
public Dimensions getPreferredSize() {
throw new UnsupportedOperationException();
}
@Override
public void layout() {
// No-op
}
@Override
public void paint(Graphics2D graphics) {
ScrollBar scrollBar = (ScrollBar)TerraScrollBarSkin.this.getComponent();
Orientation orientation = scrollBar.getOrientation();
int width = getWidth();
int height = getHeight();
// Paint the background
Color backgroundColor = highlighted ?
scrollButtonHighlightedBackgroundColor :
scrollButtonBackgroundColor;
Color brightBackgroundColor = TerraTheme.brighten(backgroundColor);
Color darkBackgroundColor = TerraTheme.darken(backgroundColor);
if (orientation == Orientation.HORIZONTAL) {
graphics.setPaint(new GradientPaint(0, 1, brightBackgroundColor,
0, height - 2, backgroundColor));
} else {
graphics.setPaint(new GradientPaint(1, 0, brightBackgroundColor,
width - 2, 0, backgroundColor));
}
graphics.fillRect(1, 1, width - 2, height - 2);
// Paint the border
graphics.setPaint(borderColor);
graphics.setStroke(new BasicStroke());
GraphicsUtilities.drawRect(graphics, 0, 0, width, height);
// Paint the hash marks
if (orientation == Orientation.HORIZONTAL) {
int middle = width / 2;
graphics.setPaint(darkBackgroundColor);
graphics.drawLine(middle - 3, 4, middle - 3, height - 5);
graphics.drawLine(middle, 4, middle, height - 5);
graphics.drawLine(middle + 3, 4, middle + 3, height - 5);
graphics.setPaint(brightBackgroundColor);
graphics.drawLine(middle - 2, 4, middle - 2, height - 5);
graphics.drawLine(middle + 1, 4, middle + 1, height - 5);
graphics.drawLine(middle + 4, 4, middle + 4, height - 5);
} else {
int middle = height / 2;
graphics.setPaint(darkBackgroundColor);
graphics.drawLine(4, middle - 3, width - 5, middle - 3);
graphics.drawLine(4, middle, width - 5, middle);
graphics.drawLine(4, middle + 3, width - 5, middle + 3);
graphics.setPaint(brightBackgroundColor);
graphics.drawLine(4, middle - 2, width - 5, middle - 2);
graphics.drawLine(4, middle + 1, width - 5, middle + 1);
graphics.drawLine(4, middle + 4, width - 5, middle + 4);
}
}
@Override
public void mouseOver(Component component) {
super.mouseOver(component);
highlighted = true;
repaintComponent();
}
@Override
public void mouseOut(Component component) {
super.mouseOut(component);
highlighted = false;
repaintComponent();
}
@Override
public boolean mouseMove(Component component, int x, int y) {
boolean consumed = super.mouseMove(component, x, y);
if (Mouse.getCapturer() == component) {
ScrollBar scrollBar = (ScrollBar)TerraScrollBarSkin.this.getComponent();
Orientation orientation = scrollBar.getOrientation();
// Calculate the new scroll bar value
int pixelValue;
if (orientation == Orientation.HORIZONTAL) {
pixelValue = component.getX() - scrollUpButton.getWidth() + x - dragOffset;
} else {
pixelValue = component.getY() - scrollUpButton.getHeight() + y - dragOffset;
}
int realValue = (int)(pixelValue / getValueScale());
// Bound the value
int end = scrollBar.getEnd();
int extent = scrollBar.getExtent();
realValue = Math.min(Math.max(realValue, 0), end - extent);
// Update the scroll bar
scrollBar.setValue(realValue);
}
return consumed;
}
@Override
public boolean mouseDown(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseDown(component, button, x, y);
if (button == Mouse.Button.LEFT) {
ScrollBar scrollBar = (ScrollBar)TerraScrollBarSkin.this.getComponent();
Orientation orientation = scrollBar.getOrientation();
dragOffset = (orientation == Orientation.HORIZONTAL ? x : y);
Mouse.capture(component);
consumed = true;
}
return consumed;
}
@Override
public boolean mouseUp(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseUp(component, button, x, y);
if (button == Mouse.Button.LEFT
&& Mouse.getCapturer() == component) {
Mouse.release();
}
return consumed;
}
}
private static final int DEFAULT_THICKNESS = 15;
private static final int DEFAULT_LENGTH = 100;
private AutomaticScroller automaticScroller = new AutomaticScroller();
private ScrollButton scrollUpButton = new ScrollButton(-1, new ScrollUpImage());
private ScrollButton scrollDownButton = new ScrollButton(1, new ScrollDownImage());
private Handle handle = new Handle();
private int minimumHandleLength;
private Color borderColor;
private Color scrollButtonImageColor;
private Color scrollButtonBackgroundColor;
private Color scrollButtonDisabledBackgroundColor;
private Color scrollButtonPressedBackgroundColor;
private Color scrollButtonHighlightedBackgroundColor;
public TerraScrollBarSkin() {
TerraTheme theme = (TerraTheme)Theme.getTheme();
minimumHandleLength = 31;
borderColor = theme.getColor(7);
scrollButtonImageColor = theme.getColor(1);
scrollButtonBackgroundColor = theme.getColor(10);
scrollButtonDisabledBackgroundColor = theme.getColor(10);
scrollButtonPressedBackgroundColor = theme.getColor(9);
scrollButtonHighlightedBackgroundColor = theme.getColor(11);
}
@Override
public void install(Component component) {
super.install(component);
ScrollBar scrollBar = (ScrollBar)component;
scrollBar.getScrollBarListeners().add(this);
scrollBar.getScrollBarValueListeners().add(this);
scrollBar.add(scrollUpButton);
scrollBar.add(scrollDownButton);
scrollBar.add(handle);
TerraTheme theme = (TerraTheme)Theme.getTheme();
Color backgroundColor = theme.getColor(9);
Color brightBackgroundColor = TerraTheme.brighten(backgroundColor);
GradientPaint backgroundPaint;
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
backgroundPaint = new GradientPaint(0, 1, backgroundColor,
0, DEFAULT_THICKNESS - 2, brightBackgroundColor);
} else {
backgroundPaint = new GradientPaint(1, 0, backgroundColor,
DEFAULT_THICKNESS - 2, 0, brightBackgroundColor);
}
setBackgroundPaint(backgroundPaint);
enabledChanged(scrollBar);
}
@Override
public int getPreferredWidth(int height) {
ScrollBar scrollBar = (ScrollBar)getComponent();
int preferredWidth = 0;
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
preferredWidth = DEFAULT_LENGTH;
} else {
preferredWidth = DEFAULT_THICKNESS;
}
return preferredWidth;
}
@Override
public int getPreferredHeight(int width) {
ScrollBar scrollBar = (ScrollBar)getComponent();
int preferredHeight = 0;
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
preferredHeight = DEFAULT_THICKNESS;
} else {
preferredHeight = DEFAULT_LENGTH;
}
return preferredHeight;
}
@Override
public Dimensions getPreferredSize() {
ScrollBar scrollBar = (ScrollBar)getComponent();
int preferredWidth = 0;
int preferredHeight = 0;
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
preferredWidth = DEFAULT_LENGTH;
preferredHeight = DEFAULT_THICKNESS;
} else {
preferredWidth = DEFAULT_THICKNESS;
preferredHeight = DEFAULT_LENGTH;
}
return new Dimensions(preferredWidth, preferredHeight);
}
@Override
public void layout() {
ScrollBar scrollBar = (ScrollBar)getComponent();
int width = getWidth();
int height = getHeight();
int start = scrollBar.getStart();
int end = scrollBar.getEnd();
int extent = scrollBar.getExtent();
int value = scrollBar.getValue();
int maxLegalRealValue = end - extent;
int numLegalRealValues = maxLegalRealValue - start + 1;
float extentPercentage = (float)extent / (float)(end - start);
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
scrollUpButton.setSize(scrollUpButton.getPreferredWidth(-1), height);
scrollUpButton.setLocation(0, 0);
scrollDownButton.setSize(scrollDownButton.getPreferredWidth(-1), height);
scrollDownButton.setLocation(width - scrollDownButton.getWidth(), 0);
if (scrollBar.isEnabled()) {
// Calculate the handle width first, as it dictates how much
// room is left to represent the range of legal values. Note
// that the handle may overlap each scroll button by 1px so
// that its borders merge into the borders of the scroll buttons
int availableWidth = width - scrollUpButton.getWidth() -
scrollDownButton.getWidth() + 2;
int handleWidth = Math.max(minimumHandleLength,
Math.round(extentPercentage * availableWidth));
// Calculate the position of the handle by calculating the
// scale that maps logical value to pixel value
int numLegalPixelValues = availableWidth - handleWidth + 1;
float valueScale = (float)numLegalPixelValues / (float)numLegalRealValues;
int handleX = (int)(value * valueScale) +
scrollUpButton.getWidth() - 1;
if (handleWidth > availableWidth) {
// If we can't fit the handle, we hide it
handle.setVisible(false);
} else {
handle.setVisible(true);
handle.setSize(handleWidth, height);
handle.setLocation(handleX, 0);
}
} else {
handle.setVisible(false);
}
} else {
scrollUpButton.setSize(width, scrollUpButton.getPreferredHeight(-1));
scrollUpButton.setLocation(0, 0);
scrollDownButton.setSize(width, scrollDownButton.getPreferredHeight(-1));
scrollDownButton.setLocation(0, height - scrollDownButton.getHeight());
if (scrollBar.isEnabled()) {
// Calculate the handle height first, as it dictates how much
// room is left to represent the range of legal values. Note
// that the handle may overlap each scroll button by 1px so
// that its borders merge into the borders of the scroll buttons
int availableHeight = height - scrollUpButton.getHeight() -
scrollDownButton.getHeight() + 2;
int handleHeight = Math.max(minimumHandleLength,
Math.round(extentPercentage * availableHeight));
// Calculate the position of the handle by calculating the
// scale maps logical value to pixel value
int numLegalPixelValues = availableHeight - handleHeight + 1;
float valueScale = (float)numLegalPixelValues / (float)numLegalRealValues;
int handleY = (int)(value * valueScale) +
scrollUpButton.getHeight() - 1;
if (handleHeight > availableHeight) {
// If we can't fit the handle, we hide it
handle.setVisible(false);
} else {
handle.setVisible(true);
handle.setSize(width, handleHeight);
handle.setLocation(0, handleY);
}
} else {
handle.setVisible(false);
}
}
}
@Override
public void paint(Graphics2D graphics) {
super.paint(graphics);
ScrollBar scrollBar = (ScrollBar)getComponent();
int width = getWidth();
int height = getHeight();
graphics.setPaint(borderColor);
// Paint the scroll bar border lines
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
int scrollUpButtonWidth = scrollUpButton.getWidth();
int scrollDownButtonWidth = scrollDownButton.getWidth();
GraphicsUtilities.drawLine(graphics, scrollUpButtonWidth, 0,
width - scrollDownButtonWidth - scrollUpButtonWidth, Orientation.HORIZONTAL);
GraphicsUtilities.drawLine(graphics, scrollUpButtonWidth, height - 1,
width - scrollDownButtonWidth - scrollUpButtonWidth, Orientation.HORIZONTAL);
} else {
int scrollUpButtonHeight = scrollUpButton.getHeight();
int scrollDownButtonHeight = scrollDownButton.getHeight();
GraphicsUtilities.drawLine(graphics, 0, scrollUpButtonHeight,
height - scrollDownButtonHeight - scrollUpButtonHeight, Orientation.VERTICAL);
GraphicsUtilities.drawLine(graphics, width - 1, scrollUpButtonHeight,
height - scrollDownButtonHeight - scrollUpButtonHeight, Orientation.VERTICAL);
}
}
public final void setBackgroundColor(int backgroundColor) {
TerraTheme theme = (TerraTheme)Theme.getTheme();
setBackgroundColor(theme.getColor(backgroundColor));
}
public int getMinimumHandleLength() {
return minimumHandleLength;
}
public void setMinimumHandleLength(int minimumHandleLength) {
if (minimumHandleLength <= 0) {
throw new IllegalArgumentException("minimumHandleLength must be positive.");
}
if (minimumHandleLength != this.minimumHandleLength) {
this.minimumHandleLength = minimumHandleLength;
invalidateComponent();
}
}
public Color getBorderColor() {
return borderColor;
}
public void setBorderColor(Color borderColor) {
if (borderColor == null) {
throw new IllegalArgumentException("borderColor is null");
}
this.borderColor = borderColor;
repaintComponent();
}
public final void setBorderColor(String borderColor) {
if (borderColor == null) {
throw new IllegalArgumentException("borderColor is null");
}
setBorderColor(GraphicsUtilities.decodeColor(borderColor));
}
public final void setBorderColor(int borderColor) {
TerraTheme theme = (TerraTheme)Theme.getTheme();
setBorderColor(theme.getColor(borderColor));
}
public Color getScrollButtonImageColor() {
return scrollButtonImageColor;
}
public void setScrollButtonImageColor(Color scrollButtonImageColor) {
if (scrollButtonImageColor == null) {
throw new IllegalArgumentException("scrollButtonImageColor is null");
}
this.scrollButtonImageColor = scrollButtonImageColor;
repaintComponent();
}
public final void setScrollButtonImageColor(String scrollButtonImageColor) {
if (scrollButtonImageColor == null) {
throw new IllegalArgumentException("scrollButtonImageColor is null");
}
setScrollButtonImageColor(GraphicsUtilities.decodeColor(scrollButtonImageColor));
}
public final void setScrollButtonImageColor(int scrollButtonImageColor) {
TerraTheme theme = (TerraTheme)Theme.getTheme();
setScrollButtonImageColor(theme.getColor(scrollButtonImageColor));
}
public Color getScrollButtonBackgroundColor() {
return scrollButtonBackgroundColor;
}
public void setScrollButtonBackgroundColor(Color scrollButtonBackgroundColor) {
if (scrollButtonBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonBackgroundColor is null");
}
this.scrollButtonBackgroundColor = scrollButtonBackgroundColor;
repaintComponent();
}
public final void setScrollButtonBackgroundColor(String scrollButtonBackgroundColor) {
if (scrollButtonBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonBackgroundColor is null");
}
setScrollButtonBackgroundColor(GraphicsUtilities.decodeColor(scrollButtonBackgroundColor));
}
public final void setScrollButtonBackgroundColor(int scrollButtonBackgroundColor) {
TerraTheme theme = (TerraTheme)Theme.getTheme();
setScrollButtonBackgroundColor(theme.getColor(scrollButtonBackgroundColor));
}
public Color getScrollButtonDisabledBackgroundColor() {
return scrollButtonDisabledBackgroundColor;
}
public void setScrollButtonDisabledBackgroundColor(Color scrollButtonDisabledBackgroundColor) {
if (scrollButtonDisabledBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonDisabledBackgroundColor is null");
}
this.scrollButtonDisabledBackgroundColor = scrollButtonDisabledBackgroundColor;
repaintComponent();
}
public final void setScrollButtonDisabledBackgroundColor(String scrollButtonDisabledBackgroundColor) {
if (scrollButtonDisabledBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonDisabledBackgroundColor is null");
}
setScrollButtonDisabledBackgroundColor(GraphicsUtilities.decodeColor(scrollButtonDisabledBackgroundColor));
}
public final void setScrollButtonDisabledBackgroundColor(int scrollButtonDisabledBackgroundColor) {
TerraTheme theme = (TerraTheme)Theme.getTheme();
setScrollButtonDisabledBackgroundColor(theme.getColor(scrollButtonDisabledBackgroundColor));
}
public Color getScrollButtonPressedBackgroundColor() {
return scrollButtonPressedBackgroundColor;
}
public void setScrollButtonPressedBackgroundColor(Color scrollButtonPressedBackgroundColor) {
if (scrollButtonPressedBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonPressedBackgroundColor is null");
}
this.scrollButtonPressedBackgroundColor = scrollButtonPressedBackgroundColor;
repaintComponent();
}
public final void setScrollButtonPressedBackgroundColor(String scrollButtonPressedBackgroundColor) {
if (scrollButtonPressedBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonPressedBackgroundColor is null");
}
setScrollButtonPressedBackgroundColor(GraphicsUtilities.decodeColor(scrollButtonPressedBackgroundColor));
}
public final void setScrollButtonPressedBackgroundColor(int scrollButtonPressedBackgroundColor) {
TerraTheme theme = (TerraTheme)Theme.getTheme();
setScrollButtonPressedBackgroundColor(theme.getColor(scrollButtonPressedBackgroundColor));
}
public Color getScrollButtonHighlightedBackgroundColor() {
return scrollButtonHighlightedBackgroundColor;
}
public void setScrollButtonHighlightedBackgroundColor(Color scrollButtonHighlightedBackgroundColor) {
if (scrollButtonHighlightedBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonHighlightedBackgroundColor is null");
}
this.scrollButtonHighlightedBackgroundColor = scrollButtonHighlightedBackgroundColor;
repaintComponent();
}
public final void setScrollButtonHighlightedBackgroundColor(String scrollButtonHighlightedBackgroundColor) {
if (scrollButtonHighlightedBackgroundColor == null) {
throw new IllegalArgumentException("scrollButtonHighlightedBackgroundColor is null");
}
setScrollButtonHighlightedBackgroundColor(GraphicsUtilities.decodeColor(scrollButtonHighlightedBackgroundColor));
}
public final void setScrollButtonHighlightedBackgroundColor(int scrollButtonHighlightedBackgroundColor) {
TerraTheme theme = (TerraTheme)Theme.getTheme();
setScrollButtonHighlightedBackgroundColor(theme.getColor(scrollButtonHighlightedBackgroundColor));
}
@Override
public void mouseOut(Component component) {
super.mouseOut(component);
automaticScroller.stop();
}
/**
* Initiates automatic block scrolling. This only happens if the handle is
* visible since whether the user clicked before or after the handle
* determines the direction of the scrolling.
*
* @param component
* The scroll bar.
*
* @param button
* The button that was pressed.
*
* @param x
* The x-coordinate of the event in the scroll bar's coordinate space.
*
* @param y
* The y-coordinate of the event in the scroll bar's coordinate space.
*/
@Override
public boolean mouseDown(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseDown(component, button, x, y);
if (button == Mouse.Button.LEFT
&& handle.isVisible()) {
ScrollBar scrollBar = (ScrollBar)getComponent();
// Begin automatic block scrolling. Calculate the direction of
// the scroll by checking to see if the user pressed the mouse
// in the area "before" the handle or "after" it.
int direction;
int realStopValue;
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
direction = x < handle.getX() ? -1 : 1;
int pixelStopValue = x - scrollUpButton.getWidth() + 1;
if (direction == 1) {
// If we're scrolling down, account for the width of the
// handle in our pixel stop value so that we stop as soon
// as the *bottom* of the handle reaches our click point
pixelStopValue -= handle.getWidth();
}
realStopValue = (int)(pixelStopValue / getValueScale());
} else {
direction = y < handle.getY() ? -1 : 1;
int pixelStopValue = y - scrollUpButton.getHeight() + 1;
if (direction == 1) {
// If we're scrolling down, account for the height of the
// handle in our pixel stop value so that we stop as soon
// as the *bottom* of the handle reaches our click point
pixelStopValue -= handle.getHeight();
}
realStopValue = (int)(pixelStopValue / getValueScale());
}
// Start the automatic scroller
automaticScroller.start(direction, Mouse.ScrollType.BLOCK, realStopValue);
consumed = true;
}
return consumed;
}
/**
* Cancels automatic block scrolling.
*
* @param component
* The scroll bar.
*
* @param button
* The button that was released.
*
* @param x
* The x-coordinate of the event in the scroll bar's coordinate space.
*
* @param y
* The y-coordinate of the event in the scroll bar's coordinate space.
*/
@Override
public boolean mouseUp(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseUp(component, button, x, y);
if (button == Mouse.Button.LEFT) {
automaticScroller.stop();
}
return consumed;
}
/**
* Updates the scroll bar's value.
*
* @param component
* The scroll bar.
*
* @param scrollType
* Unit or block scrolling.
*
* @param scrollAmount
* The amount of scrolling.
*
* @param wheelRotation
* -1 or 1 for backward or forward scrolling,
* respectively.
*
* @param x
* The x-coordinate of the event in the scroll bar's coordinate space.
*
* @param y
* The y-coordinate of the event in the scroll bar's coordinate space.
*/
@Override
public boolean mouseWheel(Component component, Mouse.ScrollType scrollType, int scrollAmount,
int wheelRotation, int x, int y) {
boolean consumed = false;
ScrollBar scrollBar = (ScrollBar)getComponent();
int previousValue = scrollBar.getValue();
int newValue = previousValue + (scrollAmount * wheelRotation *
scrollBar.getUnitIncrement());
if (wheelRotation > 0) {
int maxValue = scrollBar.getEnd() - scrollBar.getExtent();
newValue = Math.min(newValue, maxValue);
if (previousValue < maxValue) {
consumed = true;
}
} else {
newValue = Math.max(newValue, 0);
if (previousValue > 0) {
consumed = true;
}
}
scrollBar.setValue(newValue);
return consumed;
}
/**
* Gets the scale factor that allows us to translate pixel values to scroll
* bar values and vice versa. This assumes that the range of pixels spans
* from the last pixel of scrollUpButton to the first pixel of
* scrollDownButton and excludes the pixels taken up by
* handle.
*
* To map from scroll bar values (real values) to pixel values, you
* multiply by the value scale. To map from pixel values back to real
* values, you divide by the value scale.
*
* @return
* <number of legal pixel values> / <number of legal real values>
*/
private float getValueScale() {
ScrollBar scrollBar = (ScrollBar)getComponent();
float valueScale;
int start = scrollBar.getStart();
int end = scrollBar.getEnd();
int extent = scrollBar.getExtent();
int maxLegalRealValue = end - extent;
int numLegalRealValues = maxLegalRealValue - start + 1;
int numLegalPixelValues;
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
int availableWidth = getWidth() - scrollUpButton.getWidth() -
scrollDownButton.getWidth() + 2;
numLegalPixelValues = availableWidth - handle.getWidth() + 1;
} else {
int availableHeight = getHeight() - scrollUpButton.getHeight() -
scrollDownButton.getHeight() + 2;
numLegalPixelValues = availableHeight - handle.getHeight() + 1;
}
valueScale = (float)numLegalPixelValues / (float)numLegalRealValues;
return valueScale;
}
/**
* Propagates the scroll bar's enabled state to the scroll buttons.
*
* @param component
* The scroll bar.
*/
@Override
public void enabledChanged(Component component) {
boolean enabled = component.isEnabled();
scrollUpButton.setEnabled(enabled);
scrollDownButton.setEnabled(enabled);
invalidateComponent();
}
// ScrollBarListener methods
@Override
public void orientationChanged(ScrollBar scrollBar, Orientation previousOrientation) {
invalidateComponent();
}
@Override
public void scopeChanged(ScrollBar scrollBar, int previousStart, int previousEnd,
int previousExtent) {
invalidateComponent();
}
@Override
public void unitIncrementChanged(ScrollBar scrollBar, int previousUnitIncrement) {
// No-op
}
@Override
public void blockIncrementChanged(ScrollBar scrollBar, int previousBlockIncrement) {
// No-op
}
// ScrollBarValueListener methods
@Override
public void valueChanged(ScrollBar scrollBar, int previousValue) {
// Invalidating the component would yield the correct behavior but
// would be overkill. If all that has changed is the value, we can just
// update the handle's location and save the work of full invalidation.
if (handle.isVisible()) {
int value = scrollBar.getValue();
if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
int handleX = (int)(value * getValueScale()) +
scrollUpButton.getWidth() - 1;
handle.setLocation(handleX, 0);
} else {
int handleY = (int)(value * getValueScale()) +
scrollUpButton.getHeight() - 1;
handle.setLocation(0, handleY);
}
}
}
}
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