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FlatArrowButton: refactored arrow painting to FlatUIUtils.paintArrow() so that it can be easily used other components (e.g. JideSplitButton)

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This commit is contained in:
Karl Tauber
2021-03-19 01:18:13 +01:00
parent 69ac683c8c
commit d39b08c035
6 changed files with 795 additions and 76 deletions
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66
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatArrowButton.java
View File

@@ -17,16 +17,13 @@
package com.formdev.flatlaf.ui;
import static com.formdev.flatlaf.util.UIScale.scale;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Path2D;
import javax.swing.JComponent;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicArrowButton;
@@ -190,73 +187,14 @@ public class FlatArrowButton
}
protected void paintArrow( Graphics2D g ) {
int direction = getDirection();
boolean vert = (direction == NORTH || direction == SOUTH);
// compute width/height
int w = scale( arrowWidth + (chevron ? 0 : 1) );
int h = scale( (arrowWidth / 2) + (chevron ? 0 : 1) );
// rotate width/height
int rw = vert ? w : h;
int rh = vert ? h : w;
// chevron lines end 1px outside of width/height
if( chevron ) {
// add 1px to width/height for position calculation only
rw++;
rh++;
}
int x = Math.round( (getWidth() - rw) / 2f + scale( (float) xOffset ) );
int y = Math.round( (getHeight() - rh) / 2f + scale( (float) yOffset ) );
int x = 0;
// move arrow for round borders
Container parent = getParent();
if( vert && parent instanceof JComponent && FlatUIUtils.hasRoundBorder( (JComponent) parent ) )
x -= scale( parent.getComponentOrientation().isLeftToRight() ? 1 : -1 );
// paint arrow
g.translate( x, y );
/*debug
debugPaint( g, vert, rw, rh );
debug*/
Shape arrowShape = createArrowShape( direction, chevron, w, h );
if( chevron ) {
g.setStroke( new BasicStroke( scale( 1f ) ) );
g.draw( arrowShape );
} else {
// triangle
g.fill( arrowShape );
}
g.translate( -x, -y );
FlatUIUtils.paintArrow( g, x, 0, getWidth(), getHeight(), getDirection(), chevron, arrowWidth, xOffset, yOffset );
}
public static Shape createArrowShape( int direction, boolean chevron, float w, float h ) {
switch( direction ) {
case NORTH: return FlatUIUtils.createPath( !chevron, 0,h, (w / 2f),0, w,h );
case SOUTH: return FlatUIUtils.createPath( !chevron, 0,0, (w / 2f),h, w,0 );
case WEST: return FlatUIUtils.createPath( !chevron, h,0, 0,(w / 2f), h,w );
case EAST: return FlatUIUtils.createPath( !chevron, 0,0, h,(w / 2f), 0,w );
default: return new Path2D.Float();
}
}
/*debug
private void debugPaint( Graphics g, boolean vert, int w, int h ) {
Color oldColor = g.getColor();
g.setColor( Color.red );
g.drawRect( 0, 0, w - 1, h - 1 );
int xy1 = -2;
int xy2 = h + 1;
for( int i = 0; i < 20; i++ ) {
g.drawRect( vert ? 0 : xy1, vert ? xy1 : 0, 0, 0 );
g.drawRect( vert ? 0 : xy2, vert ? xy2 : 0, 0, 0 );
xy1 -= 2;
xy2 += 2;
}
g.setColor( oldColor );
}
debug*/
}

108
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatUIUtils.java
View File

@@ -16,6 +16,7 @@
package com.formdev.flatlaf.ui;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
@@ -30,6 +31,7 @@ import java.awt.KeyboardFocusManager;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.Window;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
@@ -44,6 +46,7 @@ import java.util.function.Supplier;
import javax.swing.JComponent;
import javax.swing.JTable;
import javax.swing.LookAndFeel;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
@@ -609,6 +612,111 @@ public class FlatUIUtils
return rect;
}
/**
* Paints a chevron or triangle arrow in the center of the given rectangle.
*
* @param g the graphics context used for painting
* @param x the x coordinate of the rectangle
* @param y the y coordinate of the rectangle
* @param width the width of the rectangle
* @param height the height of the rectangle
* @param direction the arrow direction ({@link SwingConstants#NORTH}, {@link SwingConstants#SOUTH}
* {@link SwingConstants#WEST} or {@link SwingConstants#EAST})
* @param chevron {@code true} for chevron arrow, {@code false} for triangle arrow
* @param arrowSize the width of the painted arrow (for vertical direction) (will be scaled)
* @param xOffset a offset added to the x coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
* @param yOffset a offset added to the y coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
*
* @since 1.1
*/
public static void paintArrow( Graphics2D g, int x, int y, int width, int height,
int direction, boolean chevron, int arrowSize, int xOffset, int yOffset )
{
// compute arrow width/height
int aw = UIScale.scale( arrowSize + (chevron ? 0 : 1) );
int ah = UIScale.scale( (arrowSize / 2) + (chevron ? 0 : 1) );
// rotate arrow width/height for horizontal directions
boolean vert = (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH);
if( !vert ) {
int temp = aw;
aw = ah;
ah = temp;
}
// chevron lines end 1px outside of width/height
// --> add 1px to arrow width/height for position calculation
int extra = chevron ? 1 : 0;
// compute arrow location
int ax = x + Math.round( ((width - (aw + extra)) / 2f) + UIScale.scale( (float) xOffset ) );
int ay = y + Math.round( ((height - (ah + extra)) / 2f) + UIScale.scale( (float) yOffset ) );
// paint arrow
g.translate( ax, ay );
/*debug
debugPaintArrow( g, Color.red, vert, aw + extra, ah + extra );
debug*/
Shape arrowShape = createArrowShape( direction, chevron, aw, ah );
if( chevron ) {
Stroke oldStroke = g.getStroke();
g.setStroke( new BasicStroke( UIScale.scale( 1f ) ) );
g.draw( arrowShape );
g.setStroke( oldStroke );
} else {
// triangle
g.fill( arrowShape );
}
g.translate( -ax, -ay );
}
/**
* Creates a chevron or triangle arrow shape for the given direction and size.
* <p>
* The chevron shape is a open path that can be painted with {@link Graphics2D#draw(Shape)}.
* The triangle shape is a close path that can be painted with {@link Graphics2D#fill(Shape)}.
*
* @param direction the arrow direction ({@link SwingConstants#NORTH}, {@link SwingConstants#SOUTH}
* {@link SwingConstants#WEST} or {@link SwingConstants#EAST})
* @param chevron {@code true} for chevron arrow, {@code false} for triangle arrow
* @param w the width of the returned shape
* @param h the height of the returned shape
*
* @since 1.1
*/
public static Shape createArrowShape( int direction, boolean chevron, float w, float h ) {
switch( direction ) {
case SwingConstants.NORTH: return createPath( !chevron, 0,h, (w / 2f),0, w,h );
case SwingConstants.SOUTH: return createPath( !chevron, 0,0, (w / 2f),h, w,0 );
case SwingConstants.WEST: return createPath( !chevron, w,0, 0,(h / 2f), w,h );
case SwingConstants.EAST: return createPath( !chevron, 0,0, w,(h / 2f), 0,h );
default: return new Path2D.Float();
}
}
/*debug
private static void debugPaintArrow( Graphics2D g, Color color, boolean vert, int w, int h ) {
Color oldColor = g.getColor();
g.setColor( color );
g.fill( createRectangle( 0, 0, w, h, 1 ) );
int xy1 = -2;
int x2 = w + 1;
int y2 = h + 1;
for( int i = 0; i < 20; i++ ) {
g.fillRect( 0, xy1, 1, 1 );
g.fillRect( 0, y2, 1, 1 );
g.fillRect( xy1, 0, 1, 1 );
g.fillRect( x2, 0, 1, 1 );
xy1 -= 2;
x2 += 2;
y2 += 2;
}
g.setColor( oldColor );
}
debug*/
/**
* Creates a closed path for the given points.
*/