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List: support rounded selection

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This commit is contained in:
Karl Tauber
2022-06-03 14:26:05 +02:00
parent 3802c64be3
commit 450fc123ff
12 changed files with 344 additions and 14 deletions
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152
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatListUI.java
View File

@@ -17,20 +17,32 @@
package com.formdev.flatlaf.ui;
import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.beans.PropertyChangeListener;
import java.util.Map;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.ListCellRenderer;
import javax.swing.ListModel;
import javax.swing.ListSelectionModel;
import javax.swing.UIManager;
import javax.swing.event.ListSelectionListener;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicListUI;
import com.formdev.flatlaf.FlatClientProperties;
import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
import com.formdev.flatlaf.util.Graphics2DProxy;
import com.formdev.flatlaf.util.LoggingFacade;
import com.formdev.flatlaf.util.UIScale;
/**
* Provides the Flat LaF UI delegate for {@link javax.swing.JList}.
@@ -59,6 +71,8 @@ import com.formdev.flatlaf.util.LoggingFacade;
*
* @uiDefault List.selectionInactiveBackground Color
* @uiDefault List.selectionInactiveForeground Color
* @uiDefault List.selectionInsets Insets
* @uiDefault List.selectionArc int
*
* <!-- FlatListCellBorder -->
*
@@ -76,6 +90,8 @@ public class FlatListUI
@Styleable protected Color selectionForeground;
@Styleable protected Color selectionInactiveBackground;
@Styleable protected Color selectionInactiveForeground;
/** @since 3 */ @Styleable protected Insets selectionInsets;
/** @since 3 */ @Styleable protected int selectionArc;
// for FlatListCellBorder
/** @since 2 */ @Styleable protected Insets cellMargins;
@@ -103,6 +119,8 @@ public class FlatListUI
selectionForeground = UIManager.getColor( "List.selectionForeground" );
selectionInactiveBackground = UIManager.getColor( "List.selectionInactiveBackground" );
selectionInactiveForeground = UIManager.getColor( "List.selectionInactiveForeground" );
selectionInsets = UIManager.getInsets( "List.selectionInsets" );
selectionArc = UIManager.getInt( "List.selectionArc" );
toggleSelectionColors();
}
@@ -161,6 +179,29 @@ public class FlatListUI
};
}
@Override
protected ListSelectionListener createListSelectionListener() {
ListSelectionListener superListener = super.createListSelectionListener();
return e -> {
superListener.valueChanged( e );
// for united rounded selection, repaint parts of the rows that adjoin to the changed rows
if( useUnitedRoundedSelection() &&
!list.isSelectionEmpty() &&
(list.getMaxSelectionIndex() - list.getMinSelectionIndex()) >= 1 )
{
int size = list.getModel().getSize();
int firstIndex = Math.min( Math.max( e.getFirstIndex(), 0 ), size - 1 );
int lastIndex = Math.min( Math.max( e.getLastIndex(), 0 ), size - 1 );
Rectangle r = getCellBounds( list, firstIndex, lastIndex );
if( r != null ) {
int arc = (int) Math.ceil( UIScale.scale( selectionArc / 2f ) );
list.repaint( r.x, r.y - arc, r.width, r.height + (arc * 2) );
}
}
};
}
/** @since 2 */
protected void installStyle() {
try {
@@ -234,4 +275,115 @@ public class FlatListUI
list.setSelectionForeground( selectionInactiveForeground );
}
}
@SuppressWarnings( "rawtypes" )
@Override
protected void paintCell( Graphics g, int row, Rectangle rowBounds, ListCellRenderer cellRenderer,
ListModel dataModel, ListSelectionModel selModel, int leadIndex )
{
boolean isSelected = selModel.isSelectedIndex( row );
// get renderer component
@SuppressWarnings( "unchecked" )
Component rendererComponent = cellRenderer.getListCellRendererComponent( list,
dataModel.getElementAt( row ), row, isSelected, list.hasFocus() && (row == leadIndex) );
//
boolean isFileList = Boolean.TRUE.equals( list.getClientProperty( "List.isFileList" ) );
int cx, cw;
if( isFileList ) {
// see BasicListUI.paintCell()
cw = Math.min( rowBounds.width, rendererComponent.getPreferredSize().width + 4 );
cx = list.getComponentOrientation().isLeftToRight()
? rowBounds.x
: rowBounds.x + (rowBounds.width - cw);
} else {
cx = rowBounds.x;
cw = rowBounds.width;
}
// rounded selection or selection insets
if( isSelected &&
!isFileList &&
rendererComponent instanceof DefaultListCellRenderer &&
(selectionArc > 0 ||
(selectionInsets != null &&
(selectionInsets.top != 0 || selectionInsets.left != 0 || selectionInsets.bottom != 0 || selectionInsets.right != 0))) )
{
// Because selection painting is done in the cell renderer, it would be
// necessary to require a FlatLaf specific renderer to implement rounded selection.
// Using a LaF specific renderer was avoided because often a custom renderer is
// already used in applications. Then either the rounded selection is not used,
// or the application has to be changed to extend a FlatLaf renderer.
//
// To solve this, a graphics proxy is used that paints rounded selection
// if row is selected and the renderer wants to fill the background.
class RoundedSelectionGraphics extends Graphics2DProxy {
RoundedSelectionGraphics( Graphics delegate ) {
super( (Graphics2D) delegate );
}
@Override
public Graphics create() {
return new RoundedSelectionGraphics( super.create() );
}
@Override
public Graphics create( int x, int y, int width, int height ) {
return new RoundedSelectionGraphics( super.create( x, y, width, height ) );
}
@Override
public void fillRect( int x, int y, int width, int height ) {
if( x == 0 && y == 0 && width == rowBounds.width && height == rowBounds.height &&
this.getColor() == rendererComponent.getBackground() )
{
paintCellSelection( this, row, x, y, width, height );
} else
super.fillRect( x, y, width, height );
}
}
g = new RoundedSelectionGraphics( g );
}
// paint renderer
rendererPane.paintComponent( g, rendererComponent, list, cx, rowBounds.y, cw, rowBounds.height, true );
}
/** @since 3 */
protected void paintCellSelection( Graphics g, int row, int x, int y, int width, int height ) {
float arcTop, arcBottom;
arcTop = arcBottom = UIScale.scale( selectionArc / 2f );
if( useUnitedRoundedSelection() ) {
if( row > 0 && list.isSelectedIndex( row - 1 ) )
arcTop = 0;
if( row < list.getModel().getSize() - 1 && list.isSelectedIndex( row + 1 ) )
arcBottom = 0;
}
FlatUIUtils.paintSelection( (Graphics2D) g, x, y, width, height,
UIScale.scale( selectionInsets ), arcTop, arcTop, arcBottom, arcBottom, 0 );
}
private boolean useUnitedRoundedSelection() {
return selectionArc > 0 &&
(selectionInsets == null || (selectionInsets.top == 0 && selectionInsets.bottom == 0));
}
/**
* Paints a cell selection at the given coordinates.
* The selection color must be set on the graphics context.
* <p>
* This method is intended for use in custom cell renderers.
*
* @since 3
*/
public static void paintCellSelection( JList<?> list, Graphics g, int row, int x, int y, int width, int height ) {
if( !(list.getUI() instanceof FlatListUI) )
return;
FlatListUI ui = (FlatListUI) list.getUI();
ui.paintCellSelection( g, row, x, y, width, height );
}
}

4
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTreeUI.java
View File

@@ -318,12 +318,12 @@ public class FlatTreeUI
// same is done in BasicTreeUI.Handler.valueChanged()
tree.repaint();
} else {
int arcHeight = (int) Math.ceil( UIScale.scale( (float) selectionArc ) );
int arc = (int) Math.ceil( UIScale.scale( selectionArc / 2f ) );
for( TreePath path : changedPaths ) {
Rectangle r = getPathBounds( tree, path );
if( r != null )
tree.repaint( r.x, r.y - arcHeight, r.width, r.height + (arcHeight * 2) );
tree.repaint( r.x, r.y - arc, r.width, r.height + (arc * 2) );
}
}
}

3
flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties
View File

@@ -390,6 +390,8 @@ InternalFrameTitlePane.border = 0,8,0,0
List.border = 0,0,0,0
List.cellMargins = 1,6,1,6
List.selectionInsets = 0,0,0,0
List.selectionArc = 0
List.cellFocusColor = @cellFocusColor
List.cellNoFocusBorder = com.formdev.flatlaf.ui.FlatListCellBorder$Default
List.focusCellHighlightBorder = com.formdev.flatlaf.ui.FlatListCellBorder$Focused
@@ -904,7 +906,6 @@ Tree.icon.closedColor = @icon
Tree.icon.openColor = @icon
#---- Styles ------------------------------------------------------------------
#---- inTextField ----

2
flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableInfo.java
View File

@@ -254,6 +254,8 @@ public class TestFlatStyleableInfo
"selectionForeground", Color.class,
"selectionInactiveBackground", Color.class,
"selectionInactiveForeground", Color.class,
"selectionInsets", Insets.class,
"selectionArc", int.class,
// FlatListCellBorder
"cellMargins", Insets.class,

2
flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java
View File

@@ -401,6 +401,8 @@ public class TestFlatStyling
ui.applyStyle( "selectionForeground: #fff" );
ui.applyStyle( "selectionInactiveBackground: #fff" );
ui.applyStyle( "selectionInactiveForeground: #fff" );
ui.applyStyle( "selectionInsets: 1,2,3,4" );
ui.applyStyle( "selectionArc: 8" );
// FlatListCellBorder
ui.applyStyle( "cellMargins: 1,2,3,4" );