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TableHeader: do not show resize cursor for last column if resizing last column is not possible because auto resize mode of table is not off (issue #332)

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This commit is contained in:
Karl Tauber
2021-09-04 18:20:21 +02:00
parent c7054537e7
commit d508f339c1
2 changed files with 61 additions and 0 deletions
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59
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTableHeaderUI.java
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@@ -18,10 +18,13 @@ package com.formdev.flatlaf.ui;
import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.awt.geom.Rectangle2D;
import java.util.Objects;
import javax.swing.Icon;
@@ -31,6 +34,7 @@ import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.event.MouseInputListener;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicTableHeaderUI;
@@ -94,6 +98,11 @@ public class FlatTableHeaderUI
bottomSeparatorColor = null;
}
@Override
protected MouseInputListener createMouseInputListener() {
return new FlatMouseInputHandler();
}
// overridden and made public to allow usage in custom renderers
@Override
public int getRolloverColumn() {
@@ -252,4 +261,54 @@ public class FlatTableHeaderUI
return (origBorder != null) ? origBorder.isBorderOpaque() : false;
}
}
//---- class FlatMouseInputHandler ----------------------------------------
/**
* @since 1.6
*/
protected class FlatMouseInputHandler
extends MouseInputHandler
{
Cursor oldCursor;
@Override
public void mouseMoved( MouseEvent e ) {
// restore old cursor, which is necessary because super.mouseMoved() swaps cursors
if( oldCursor != null ) {
header.setCursor( oldCursor );
oldCursor = null;
}
super.mouseMoved( e );
// if resizing last column is not possible, then Swing still shows a resize cursor,
// which can be confusing for the user --> change cursor to standard cursor
JTable table;
int column;
if( header.isEnabled() &&
(table = header.getTable()) != null &&
table.getAutoResizeMode() != JTable.AUTO_RESIZE_OFF &&
header.getCursor() == Cursor.getPredefinedCursor( Cursor.E_RESIZE_CURSOR ) &&
(column = header.columnAtPoint( e.getPoint() )) >= 0 &&
column == header.getColumnModel().getColumnCount() - 1 )
{
// mouse is in last column
Rectangle r = header.getHeaderRect( column );
r.grow( -3, 0 );
if( !r.contains( e.getX(), e.getY() ) ) {
// mouse is in left or right resize area of last column
boolean isResizeLastColumn = (e.getX() >= r.x + (r.width / 2));
if( !header.getComponentOrientation().isLeftToRight() )
isResizeLastColumn = !isResizeLastColumn;
if( isResizeLastColumn ) {
// resize is not possible --> change cursor to standard cursor
oldCursor = header.getCursor();
header.setCursor( Cursor.getDefaultCursor() );
}
}
}
}
}
}