@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 void update() {
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, opacity));
graphics.setColor(color);
graphics.fillRect(0, 0, component.getWidth(), component.getHeight());
component = null;
graphics = null;
}
@Override
public AffineTransform getTransform(Component componentArgument) {
AffineTransform transform = AffineTransform.getScaleInstance(1.0, -1.0);
transform.translate(0, -(componentArgument.getHeight() * 2));
return transform;
}
/**
* 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();
}
@Override
public Graphics2D prepare(Component componentArgument, Graphics2D graphicsArgument) {
this.component = componentArgument;
this.graphics = graphicsArgument;
int width = componentArgument.getWidth();
int height = componentArgument.getHeight();
componentImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
componentImageGraphics = componentImage.createGraphics();
// Clear the image background
componentImageGraphics.setComposite(AlphaComposite.Clear);
componentImageGraphics.fillRect(0, 0, componentImage.getWidth(), componentImage.getHeight());
componentImageGraphics.setComposite(AlphaComposite.SrcOver);
return componentImageGraphics;
}
private static void sendBubbleUp(Component container, Event event) {
Container parent = container.getParent();
if (parent != null) {
sendTo(parent, event);
sendBubbleUp(parent, event);
}
if (container instanceof Display) {
Application app = Applications.get((Display) container);
sendTo(app, event);
}
}
@Override
public Bounds getBounds(Component componentArgument) {
return new Bounds(0, 0, componentArgument.getWidth(), componentArgument.getHeight());
}