AnimatedBorder added (for future animations) (issue #66)

This commit is contained in:
Karl Tauber
2021-07-13 19:43:07 +02:00
parent 13a6b92e47
commit b2245e2246
3 changed files with 580 additions and 0 deletions

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/*
* Copyright 2021 FormDev Software GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.formdev.flatlaf.util;
import java.awt.Component;
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.border.Border;
import com.formdev.flatlaf.util.Animator.Interpolator;
/**
* Border that automatically animates painting on component value changes.
* <p>
* {@link #getValue(Component)} returns the value of the component.
* If the value changes, then {@link #paintBorderAnimated(Component, Graphics, int, int, int, int, float)}
* is invoked multiple times with animated value (from old value to new value).
* <p>
* Example for an animated border:
* <pre>
* private class AnimatedMinimalTestBorder
* implements AnimatedBorder
* {
* &#64;Override
* public void paintBorderAnimated( Component c, Graphics g, int x, int y, int width, int height, float animatedValue ) {
* int lh = UIScale.scale( 2 );
*
* g.setColor( Color.blue );
* g.fillRect( x, y + height - lh, Math.round( width * animatedValue ), lh );
* }
*
* &#64;Override
* public float getValue( Component c ) {
* return c.isFocusOwner() ? 1 : 0;
* }
*
* &#64;Override
* public Insets getBorderInsets( Component c ) {
* return UIScale.scale( new Insets( 4, 4, 4, 4 ) );
* }
*
* &#64;Override public boolean isBorderOpaque() { return false; }
* }
*
* // sample usage
* JTextField textField = new JTextField();
* textField.setBorder( new AnimatedMinimalTestBorder() );
* </pre>
*
* Animation works only if the component passed to {@link #paintBorder(Component, Graphics, int, int, int, int)}
* is a instance of {@link JComponent}.
* A client property is set on the component to store the animation state.
*
* @author Karl Tauber
*/
public interface AnimatedBorder
extends Border
{
@Override
default void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
AnimationSupport.paintBorder( this, c, g, x, y, width, height );
}
/**
* Paints the border for the given animated value.
*
* @param c the component that this border belongs to
* @param g the graphics context
* @param x the x coordinate of the border
* @param y the y coordinate of the border
* @param width the width coordinate of the border
* @param height the height coordinate of the border
* @param animatedValue the animated value, which is either equal to what {@link #getValue(Component)}
* returned, or somewhere between the previous value and the latest value
* that {@link #getValue(Component)} returned
*/
void paintBorderAnimated( Component c, Graphics g, int x, int y, int width, int height, float animatedValue );
/**
* Gets the value of the component.
* <p>
* This can be any value and depends on the component.
* If the value changes, then this class animates from the old value to the new one.
* <p>
* For a text field this could be {@code 0} for not focused and {@code 1} for focused.
*/
float getValue( Component c );
/**
* Returns whether animation is enabled for this border (default is {@code true}).
*/
default boolean isAnimationEnabled() {
return true;
}
/**
* Returns the duration of the animation in milliseconds (default is 150).
*/
default int getAnimationDuration() {
return 150;
}
/**
* Returns the resolution of the animation in milliseconds (default is 10).
* Resolution is the amount of time between timing events.
*/
default int getAnimationResolution() {
return 10;
}
/**
* Returns the interpolator for the animation.
* Default is {@link CubicBezierEasing#STANDARD_EASING}.
*/
default Interpolator getAnimationInterpolator() {
return CubicBezierEasing.STANDARD_EASING;
}
/**
* Returns the client property key used to store the animation support.
*/
default Object getClientPropertyKey() {
return getClass();
}
//---- class AnimationSupport ---------------------------------------------
/**
* Animation support class that stores the animation state and implements the animation.
*/
class AnimationSupport
{
private float startValue;
private float targetValue;
private float animatedValue;
private float fraction;
private Animator animator;
// last bounds of the border needed to repaint while animating
private int x;
private int y;
private int width;
private int height;
public static void paintBorder( AnimatedBorder border, Component c, Graphics g,
int x, int y, int width, int height )
{
if( !isAnimationEnabled( border, c ) ) {
// paint without animation if animation is disabled or
// component is not a JComponent and therefore does not support
// client properties, which are required to keep animation state
paintBorderImpl( border, c, g, x, y, width, height, null );
return;
}
JComponent jc = (JComponent) c;
Object key = border.getClientPropertyKey();
AnimationSupport as = (AnimationSupport) jc.getClientProperty( key );
if( as == null ) {
// painted first time --> do not animate, but remember current component value
as = new AnimationSupport();
as.startValue = as.targetValue = as.animatedValue = border.getValue( c );
jc.putClientProperty( key, as );
} else {
// get component value
float value = border.getValue( c );
if( value != as.targetValue ) {
// value changed --> (re)start animation
if( as.animator == null ) {
// create animator
AnimationSupport as2 = as;
as.animator = new Animator( border.getAnimationDuration(), fraction -> {
// check whether component was removed while animation is running
if( !c.isDisplayable() ) {
as2.animator.stop();
return;
}
// compute animated value
as2.animatedValue = as2.startValue + ((as2.targetValue - as2.startValue) * fraction);
as2.fraction = fraction;
// repaint border
c.repaint( as2.x, as2.y, as2.width, as2.height );
}, () -> {
as2.startValue = as2.animatedValue = as2.targetValue;
as2.animator = null;
} );
}
if( as.animator.isRunning() ) {
// if animation is still running, restart it from the current
// animated value to the new target value with reduced duration
as.animator.cancel();
int duration2 = (int) (border.getAnimationDuration() * as.fraction);
if( duration2 > 0 )
as.animator.setDuration( duration2 );
as.startValue = as.animatedValue;
} else {
// new animation
as.animator.setDuration( border.getAnimationDuration() );
as.animator.setResolution( border.getAnimationResolution() );
as.animator.setInterpolator( border.getAnimationInterpolator() );
as.animatedValue = as.startValue;
}
as.targetValue = value;
as.animator.start();
}
}
as.x = x;
as.y = y;
as.width = width;
as.height = height;
paintBorderImpl( border, c, g, x, y, width, height, as );
}
private static void paintBorderImpl( AnimatedBorder border, Component c, Graphics g,
int x, int y, int width, int height, AnimationSupport as )
{
float value = (as != null) ? as.animatedValue : border.getValue( c );
border.paintBorderAnimated( c, g, x, y, width, height, value );
}
private static boolean isAnimationEnabled( AnimatedBorder border, Component c ) {
return Animator.useAnimation() && border.isAnimationEnabled() && c instanceof JComponent;
}
}
}

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/*
* Copyright 2021 FormDev Software GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.formdev.flatlaf.testing;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.geom.Rectangle2D;
import javax.swing.*;
import com.formdev.flatlaf.ui.FlatMarginBorder;
import com.formdev.flatlaf.ui.FlatUIUtils;
import com.formdev.flatlaf.util.AnimatedBorder;
import com.formdev.flatlaf.util.ColorFunctions;
import com.formdev.flatlaf.util.HiDPIUtils;
import com.formdev.flatlaf.util.UIScale;
import net.miginfocom.swing.*;
/**
* @author Karl Tauber
*/
public class FlatAnimatedBorderTest
extends FlatTestPanel
{
public static void main( String[] args ) {
SwingUtilities.invokeLater( () -> {
FlatTestFrame frame = FlatTestFrame.create( args, "FlatAnimatedBorderTest" );
frame.showFrame( FlatAnimatedBorderTest::new );
} );
}
FlatAnimatedBorderTest() {
initComponents();
textField5.setBorder( new AnimatedFocusFadeBorder() );
textField6.setBorder( new AnimatedFocusFadeBorder() );
textField1.setBorder( new AnimatedMaterialBorder() );
textField2.setBorder( new AnimatedMaterialBorder() );
textField4.setBorder( new AnimatedMinimalTestBorder() );
}
private void initComponents() {
// JFormDesigner - Component initialization - DO NOT MODIFY //GEN-BEGIN:initComponents
label3 = new JLabel();
textField5 = new JTextField();
textField6 = new JTextField();
label2 = new JLabel();
textField1 = new JTextField();
textField2 = new JTextField();
label1 = new JLabel();
textField4 = new JTextField();
durationLabel = new JLabel();
durationField = new JSpinner();
//======== this ========
setLayout(new MigLayout(
"insets dialog,hidemode 3",
// columns
"[fill]",
// rows
"[]" +
"[]" +
"[]para" +
"[]" +
"[]" +
"[]para" +
"[]" +
"[]" +
"[grow]" +
"[]"));
//---- label3 ----
label3.setText("Fade:");
add(label3, "cell 0 0");
add(textField5, "cell 0 1");
add(textField6, "cell 0 2");
//---- label2 ----
label2.setText("Material:");
add(label2, "cell 0 3");
add(textField1, "cell 0 4");
add(textField2, "cell 0 5");
//---- label1 ----
label1.setText("Minimal:");
add(label1, "cell 0 6");
add(textField4, "cell 0 7");
//---- durationLabel ----
durationLabel.setText("Duration:");
add(durationLabel, "cell 0 9");
//---- durationField ----
durationField.setModel(new SpinnerNumberModel(200, 100, null, 50));
add(durationField, "cell 0 9");
// JFormDesigner - End of component initialization //GEN-END:initComponents
}
// JFormDesigner - Variables declaration - DO NOT MODIFY //GEN-BEGIN:variables
private JLabel label3;
private JTextField textField5;
private JTextField textField6;
private JLabel label2;
private JTextField textField1;
private JTextField textField2;
private JLabel label1;
private JTextField textField4;
private JLabel durationLabel;
private JSpinner durationField;
// JFormDesigner - End of variables declaration //GEN-END:variables
//---- class AnimatedMaterialBorder ---------------------------------------
/**
* Experimental text field border that:
* - animates focus indicator color and border width
*/
private class AnimatedFocusFadeBorder
extends FlatMarginBorder
implements AnimatedBorder
{
// needed because otherwise the empty paint method in superclass
// javax.swing.border.AbstractBorder would be used
@Override
public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
AnimationSupport.paintBorder( this, c, g, x, y, width, height );
}
@Override
public void paintBorderAnimated( Component c, Graphics g, int x, int y, int width, int height, float animatedValue ) {
FlatUIUtils.setRenderingHints( g );
// border width is 1 if not focused and 2 if focused
float lw = UIScale.scale( 1 + animatedValue );
// paint border
g.setColor( ColorFunctions.mix( Color.red, Color.lightGray, animatedValue ) );
FlatUIUtils.paintComponentBorder( (Graphics2D) g, x, y, width, height, 0, lw, 0 );
}
@Override
public float getValue( Component c ) {
return FlatUIUtils.isPermanentFocusOwner( c ) ? 1 : 0;
}
@Override
public int getAnimationDuration() {
return (Integer) durationField.getValue();
}
}
//---- class AnimatedMaterialBorder ---------------------------------------
/**
* Experimental text field border that:
* - paint border only at bottom
* - animates focus indicator at bottom
*/
private class AnimatedMaterialBorder
extends FlatMarginBorder
implements AnimatedBorder
{
// needed because otherwise the empty paint method in superclass
// javax.swing.border.AbstractBorder would be used
@Override
public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
AnimationSupport.paintBorder( this, c, g, x, y, width, height );
}
@Override
public void paintBorderAnimated( Component c, Graphics g, int x, int y, int width, int height, float animatedValue ) {
FlatUIUtils.setRenderingHints( g );
// use paintAtScale1x() for consistent line thickness when scaled
HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, width, height,
(g2d, x2, y2, width2, height2, scaleFactor) -> {
float lh = (float) (UIScale.scale( 1f ) * scaleFactor);
g2d.setColor( Color.gray );
g2d.fill( new Rectangle2D.Float( x2, y2 + height2 - lh, width2, lh ) );
if( animatedValue > 0 ) {
lh = (float) (UIScale.scale( 2f ) * scaleFactor);
int lw = Math.round( width2 * animatedValue );
g2d.setColor( Color.red );
g2d.fill( new Rectangle2D.Float( x2 + (width2 - lw) / 2, y2 + height2 - lh, lw, lh ) );
}
} );
}
@Override
public float getValue( Component c ) {
return FlatUIUtils.isPermanentFocusOwner( c ) ? 1 : 0;
}
@Override
public int getAnimationDuration() {
return (Integer) durationField.getValue();
}
}
//---- class AnimatedMinimalTestBorder ------------------------------------
/**
* Minimal example for an animated border.
*/
private class AnimatedMinimalTestBorder
implements AnimatedBorder
{
@Override
public void paintBorderAnimated( Component c, Graphics g, int x, int y, int width, int height, float animatedValue ) {
int lh = UIScale.scale( 2 );
g.setColor( Color.blue );
g.fillRect( x, y + height - lh, Math.round( width * animatedValue ), lh );
}
@Override
public float getValue( Component c ) {
return FlatUIUtils.isPermanentFocusOwner( c ) ? 1 : 0;
}
@Override
public int getAnimationDuration() {
return (Integer) durationField.getValue();
}
@Override
public Insets getBorderInsets( Component c ) {
return UIScale.scale( new Insets( 4, 4, 4, 4 ) );
}
@Override
public boolean isBorderOpaque() {
return false;
}
}
}

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JFDML JFormDesigner: "7.0.4.0.360" Java: "16" encoding: "UTF-8"
new FormModel {
contentType: "form/swing"
root: new FormRoot {
add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
"$layoutConstraints": "insets dialog,hidemode 3"
"$columnConstraints": "[fill]"
"$rowConstraints": "[][][]para[][][]para[][][grow][]"
} ) {
name: "this"
add( new FormComponent( "javax.swing.JLabel" ) {
name: "label3"
"text": "Fade:"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 0"
} )
add( new FormComponent( "javax.swing.JTextField" ) {
name: "textField5"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 1"
} )
add( new FormComponent( "javax.swing.JTextField" ) {
name: "textField6"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 2"
} )
add( new FormComponent( "javax.swing.JLabel" ) {
name: "label2"
"text": "Material:"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 3"
} )
add( new FormComponent( "javax.swing.JTextField" ) {
name: "textField1"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 4"
} )
add( new FormComponent( "javax.swing.JTextField" ) {
name: "textField2"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 5"
} )
add( new FormComponent( "javax.swing.JLabel" ) {
name: "label1"
"text": "Minimal:"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 6"
} )
add( new FormComponent( "javax.swing.JTextField" ) {
name: "textField4"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 7"
} )
add( new FormComponent( "javax.swing.JLabel" ) {
name: "durationLabel"
"text": "Duration:"
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 9"
} )
add( new FormComponent( "javax.swing.JSpinner" ) {
name: "durationField"
"model": new javax.swing.SpinnerNumberModel {
minimum: 100
stepSize: 50
value: 200
}
}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
"value": "cell 0 9"
} )
}, new FormLayoutConstraints( null ) {
"location": new java.awt.Point( 0, 0 )
"size": new java.awt.Dimension( 405, 315 )
} )
}
}