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ScrollBar: preserve hover highlight while dragging even if mouse moves outside of scrollbar

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This commit is contained in:
Karl Tauber
2019-09-11 14:40:13 +02:00
parent 3505d2dfd5
commit 362c4f935b
1 changed files with 23 additions and 10 deletions
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33
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java
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@@ -155,29 +155,42 @@ public class FlatScrollBarUI
//---- class ScrollBarHoverListener ---------------------------------------
// using static field to disabling hover for other scroll bars
private static boolean isPressed;
private class ScrollBarHoverListener
extends MouseAdapter
{
@Override
public void mouseEntered( MouseEvent e ) {
hoverTrack = true;
repaint();
}
@Override
public void mouseExited( MouseEvent e ) {
hoverTrack = hoverThumb = false;
repaint();
if( !isPressed ) {
hoverTrack = hoverThumb = false;
repaint();
}
}
@Override
public void mouseMoved( MouseEvent e ) {
if( !isPressed )
update( e.getX(), e.getY() );
}
@Override
public void mousePressed( MouseEvent e ) {
isPressed = true;
}
@Override
public void mouseReleased( MouseEvent e ) {
isPressed = false;
update( e.getX(), e.getY() );
}
private void update( int x, int y ) {
boolean inThumb = thumbRect.contains( x, y );
if( inThumb != hoverThumb ) {
boolean inTrack = getTrackBounds().contains( x, y );
boolean inThumb = getThumbBounds().contains( x, y );
if( inTrack != hoverTrack || inThumb != hoverThumb ) {
hoverTrack = inTrack;
hoverThumb = inThumb;
repaint();
}