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Linux: fixed continuous cursor toggling between resize and standard cursor when resizing window with FlatLaf window decorations (issue #907)

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This commit is contained in:
Karl Tauber
2024-11-14 18:34:55 +01:00
parent b97424f767
commit d471f08b15
2 changed files with 59 additions and 14 deletions
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3
CHANGELOG.md
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@@ -7,6 +7,9 @@ FlatLaf Change Log
- HTML: Fixed wrong rendering if HTML text contains `<style>` tag with
attributes (e.g. `<style type='text/css'>`). (issue #905; regression in 3.5.1)
- FlatLaf window decorations:
- Linux: Fixed continuous cursor toggling between resize and standard cursor
when resizing window. (issue #907)
## 3.5.2

70
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatWindowResizer.java
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@@ -42,6 +42,7 @@ import javax.swing.DesktopManager;
import javax.swing.JComponent;
import javax.swing.JInternalFrame;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.JRootPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
@@ -191,7 +192,7 @@ public abstract class FlatWindowResizer
protected abstract Dimension getWindowMinimumSize();
protected abstract Dimension getWindowMaximumSize();
protected void beginResizing( int direction ) {}
protected void beginResizing( int resizeDir ) {}
protected void endResizing() {}
//---- interface PropertyChangeListener ----
@@ -234,17 +235,46 @@ public abstract class FlatWindowResizer
{
protected Window window;
private final JComponent centerComp;
private final boolean limitResizeToScreenBounds;
public WindowResizer( JRootPane rootPane ) {
super( rootPane );
// Transparent "center" component that is made visible only while resizing window.
// It uses same cursor as the area where resize dragging started.
// This ensures that the cursor shape stays stable while dragging mouse
// into the window to make window smaller. Otherwise it would toggling between
// resize and standard cursor because the component layout is not updated
// fast enough and the mouse cursor is always updated from the component
// at the mouse location.
centerComp = new JPanel();
centerComp.setOpaque( false );
centerComp.setVisible( false );
Container cont = rootPane.getLayeredPane();
cont.add( centerComp, WINDOW_RESIZER_LAYER, 4 );
// On Linux, limit window resizing to screen bounds because otherwise
// there would be a strange effect when the mouse is moved over a sidebar
// while resizing and the opposite window side is also resized.
limitResizeToScreenBounds = SystemInfo.isLinux;
}
@Override
public void uninstall() {
Container cont = topDragComp.getParent();
cont.remove( centerComp );
super.uninstall();
}
@Override
public void doLayout() {
super.doLayout();
centerComp.setBounds( 0, 0, resizeComp.getWidth(), resizeComp.getHeight() );
}
@Override
protected void addNotify() {
Container parent = resizeComp.getParent();
@@ -346,6 +376,18 @@ public abstract class FlatWindowResizer
public void windowStateChanged( WindowEvent e ) {
updateVisibility();
}
@Override
protected void beginResizing( int resizeDir ) {
centerComp.setCursor( getPredefinedCursor( resizeDir ) );
centerComp.setVisible( true );
}
@Override
protected void endResizing() {
centerComp.setVisible( false );
centerComp.setCursor( null );
}
}
//---- class InternalFrameResizer -----------------------------------------
@@ -427,7 +469,18 @@ public abstract class FlatWindowResizer
}
@Override
protected void beginResizing( int direction ) {
protected void beginResizing( int resizeDir ) {
int direction = 0;
switch( resizeDir ) {
case N_RESIZE_CURSOR: direction = NORTH; break;
case S_RESIZE_CURSOR: direction = SOUTH; break;
case W_RESIZE_CURSOR: direction = WEST; break;
case E_RESIZE_CURSOR: direction = EAST; break;
case NW_RESIZE_CURSOR: direction = NORTH_WEST; break;
case NE_RESIZE_CURSOR: direction = NORTH_EAST; break;
case SW_RESIZE_CURSOR: direction = SOUTH_WEST; break;
case SE_RESIZE_CURSOR: direction = SOUTH_EAST; break;
}
desktopManager.get().beginResizingFrame( getFrame(), direction );
}
@@ -535,18 +588,7 @@ debug*/
dragRightOffset = windowBounds.x + windowBounds.width - xOnScreen;
dragBottomOffset = windowBounds.y + windowBounds.height - yOnScreen;
int direction = 0;
switch( resizeDir ) {
case N_RESIZE_CURSOR: direction = NORTH; break;
case S_RESIZE_CURSOR: direction = SOUTH; break;
case W_RESIZE_CURSOR: direction = WEST; break;
case E_RESIZE_CURSOR: direction = EAST; break;
case NW_RESIZE_CURSOR: direction = NORTH_WEST; break;
case NE_RESIZE_CURSOR: direction = NORTH_EAST; break;
case SW_RESIZE_CURSOR: direction = SOUTH_WEST; break;
case SE_RESIZE_CURSOR: direction = SOUTH_EAST; break;
}
beginResizing( direction );
beginResizing( resizeDir );
}
@Override