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ScrollBar: fixed issue with updating thumb location (regressing since commit 2c3ef226692fa39b7e6eca3192d197c0b0753aa1)

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Karl Tauber
2020-08-09 00:14:44 +02:00
parent 762fe89867
commit 7a582c2d1f
1 changed files with 29 additions and 5 deletions
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34
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java
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@@ -474,7 +474,8 @@ public class FlatScrollBarUI
if( animator != null )
animator.cancel();
scrollbar.setValueIsAdjusting( true );
if( useValueIsAdjusting )
scrollbar.setValueIsAdjusting( true );
// if invoked while animation is running, calculation of new value
// should start at the previous target value
@@ -485,12 +486,18 @@ public class FlatScrollBarUI
r.run();
// do not use animation if started dragging thumb
if( isDragging ) {
inRunAndSetValueAnimated = false;
return;
}
int newValue = scrollbar.getValue();
if( newValue != oldValue ) {
scrollbar.setValue( oldValue );
setValueAnimated( newValue );
} else
} else if( useValueIsAdjusting )
scrollbar.setValueIsAdjusting( false );
inRunAndSetValueAnimated = false;
@@ -500,9 +507,11 @@ public class FlatScrollBarUI
private Animator animator;
private int targetValue = Integer.MIN_VALUE;
private int delta;
private boolean useValueIsAdjusting = true;
public void setValueAnimated( int value ) {
scrollbar.setValueIsAdjusting( true );
if( useValueIsAdjusting )
scrollbar.setValueIsAdjusting( true );
// create animator
if( animator == null ) {
@@ -518,13 +527,14 @@ public class FlatScrollBarUI
// re-enable valueIsAdjusting if disabled while animation is running
// (e.g. in mouse released listener)
if( !scrollbar.getValueIsAdjusting() )
if( useValueIsAdjusting && !scrollbar.getValueIsAdjusting() )
scrollbar.setValueIsAdjusting( true );
scrollbar.setValue( targetValue - delta + Math.round( delta * fraction ) );
}, () -> {
targetValue = Integer.MIN_VALUE;
scrollbar.setValueIsAdjusting( false );
if( useValueIsAdjusting )
scrollbar.setValueIsAdjusting( false );
});
animator.setResolution( resolution );
@@ -564,10 +574,24 @@ public class FlatScrollBarUI
{
@Override
public void mousePressed( MouseEvent e ) {
// Do not use valueIsAdjusting here (in runAndSetValueAnimated())
// for smooth scrolling because super.mousePressed() enables this itself
// and super.mouseRelease() disables it later.
// If we would disable valueIsAdjusting here (in runAndSetValueAnimated())
// and move the thumb with the mouse, then the thumb location is not updated
// if later scrolled with a key (e.g. HOME key).
useValueIsAdjusting = false;
runAndSetValueAnimated( () -> {
super.mousePressed( e );
} );
}
@Override
public void mouseReleased( MouseEvent e ) {
super.mouseReleased( e );
useValueIsAdjusting = true;
}
}
//---- class FlatScrollListener -------------------------------------------