Package com.peterhi.ui.stripbar5

Source Code of com.peterhi.ui.stripbar5.StripItem

package com.peterhi.ui.stripbar5;

import java.util.concurrent.TimeUnit;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Listener;
import org.jdesktop.core.animation.timing.Animator;
import org.jdesktop.core.animation.timing.Animator.Builder;
import org.jdesktop.core.animation.timing.TimingTarget;
import org.jdesktop.core.animation.timing.TimingTargetAdapter;
import org.jdesktop.core.animation.timing.interpolators.AccelerationInterpolator;

import com.peterhi.ui.UI;
import com.peterhi.ui.obsolete.Bounds;

public class StripItem extends Item implements Listener {

  public static final int DEFAULT = 0;
  public static final int FOCUSED = 1;
  public static final int PRESSED = 2;
  public static final int DRAGGED = 4;
  public static final int OUTSIDE = 8;
  public static final int SELECTED = 16;
 
  private final StripBar parent;
  private final Rectangle bounds;
  private final Rectangle renderBounds;
  private final RGB foreground;
  private final RGB renderForeground;
  private final RGB background;
  private final RGB renderBackground;
 
  private int state;
  private Animator foregroundAnimator;
  private Animator backgroundAnimator;
  private Animator boundsAnimator;
 
  public StripItem(StripBar parent, int style, int index) {
    super(parent, style, index);

    this.parent = parent;
    this.bounds = new Rectangle(0, 0, 0, 0);
    this.renderBounds = new Rectangle(0, 0, 0, 0);
    this.foreground = UI.getRGB(SWT.COLOR_WIDGET_FOREGROUND);
    this.renderForeground = UI.getRGB(SWT.COLOR_WIDGET_FOREGROUND);
    this.background = UI.getRGB(SWT.COLOR_WIDGET_BACKGROUND);
    this.renderBackground = UI.getRGB(SWT.COLOR_WIDGET_BACKGROUND);
   
    addListener(SWT.Dispose, this);
   
    Event redir = new Event();
    redir.time = (int )(System.currentTimeMillis() & 0xffffffffL);
    redir.widget = parent;
    redir.item = this;
    redir.index = index;
    redir.detail = SWT.INSERT;
   
    parent.notifyListeners(SWT.Modify, redir);
  }

  public StripItem(StripBar parent, int style) {
    this(parent, style, -1);
  }

  @Override
  public void handleEvent(Event event) {
    if (equals(event.widget)) {
      if (event.type == SWT.Dispose) {
        Event redir = new Event();
        redir.time = (int )(System.currentTimeMillis() & 0xffffffffL);
        redir.widget = parent;
        redir.item = this;
        redir.detail = SWT.DEL;
       
        parent.notifyListeners(SWT.Modify, redir);
      }
    }
  }
 
  public StripBar getParent() {
    return parent;
  }
 
  void redraw() {
    redraw(null, renderBounds);
  }
 
  boolean isState(int value, boolean exact) {
    if (exact) {
      return state == value;
    } else {
      return ((state & value) == value);
    }
  }
 
  int getState() {
    return state;
  }
 
  void setState(int value, boolean animate) {
    if (value == state) {
      return;
    }
   
    state = value;

    setForeground(getForeground(state), animate, null);
    setBackground(getBackground(state), animate, null);
  }
 
  boolean hasText() {
    if (getText() == null) {
      return false;
    }
   
    if (getText().isEmpty()) {
      return false;
    }
   
    return true;
  }
 
  boolean hasImage() {
    if (getImage() == null) {
      return false;
    }

    if (getImage().isDisposed()) {
      return false;
    }
   
    return true;
  }
 
  Point getTextSize() {
    Point size = new Point(0, 0);
   
    if (hasText()) {
      GC gc = new GC(parent);
      size = gc.stringExtent(getText());
      gc.dispose();
    }
   
    return size;
  }
 
  Point getImageSize() {
    Point size = new Point(0, 0);
   
    if (hasImage()) {
      Rectangle imageBounds = getImage().getBounds();
      size.x = imageBounds.width;
      size.y = imageBounds.height;
    }
   
    return size;
  }
 
  Rectangle getBounds() {
    return new Rectangle(bounds.x, bounds.y, bounds.width, bounds.height);
  }
 
  Rectangle getRenderBounds() {
    return new Rectangle(renderBounds.x, renderBounds.y, renderBounds.width, renderBounds.height);
  }
 
  void setBounds(Rectangle value, boolean animate, TimingTarget listener) {
    if (value == null) {
      throw new NullPointerException();
    }
   
    setBounds(value.x, value.y, value.width, value.height, animate, listener);
  }
 
  void setBounds(int x, int y, int width, int height, boolean animate, final TimingTarget listener) {
    if (bounds.x == x && bounds.y == y && bounds.width == width && bounds.height == height) {
      return;
    }
   
    bounds.x = x;
    bounds.y = y;
    bounds.width = width;
    bounds.height = height;
   
    if (animate) {
      if (isBoundsAnimating()) {
        boundsAnimator.cancel();
        boundsAnimator = null;
      }
     
      final Bounds from = Bounds.fromRectangle(getRenderBounds());
      final Bounds to = Bounds.fromXYWidthHeight(x, y, width, height);
     
      TimingTarget timingTarget = new TimingTargetAdapter() {
        @Override
        public void timingEvent(Animator source, double fraction) {
          int left = (int )Math.round(from.getLeft() + (to.getLeft() - from.getLeft()) * fraction);
          int top = (int )Math.round(from.getTop() + (to.getTop() - from.getTop()) * fraction);
          int right = (int )Math.round(from.getRight() + (to.getRight() - from.getRight()) * fraction);
          int bottom = (int )Math.round(from.getBottom() + (to.getBottom() - from.getBottom()) * fraction);
          setRenderBounds(Bounds.fromLeftTopRightBottom(left, top, right, bottom).toRectangle());
         
          if (listener != null) {
            listener.timingEvent(source, fraction);
          }
        }
       
        @Override
        public void end(Animator source) {
          setRenderBounds(to.toRectangle());
          boundsAnimator = null;
         
          if (listener != null) {
            listener.end(source);
          }
        }
      };
     
      Builder builder = new Builder();
      builder.addTarget(timingTarget);
      builder.setInterpolator(new AccelerationInterpolator(0.0, 0.9));
      builder.setDuration(160, TimeUnit.MILLISECONDS);
     
      boundsAnimator = builder.build();
      boundsAnimator.start();
    } else {
      setRenderBounds(x, y, width, height);
    }
  }
 
  RGB getForeground() {
    return new RGB(foreground.red, foreground.green, foreground.blue);
  }
 
  RGB getBackground() {
    return new RGB(background.red, background.green, background.blue);
  }
 
  RGB getRenderForeground() {
    return new RGB(renderForeground.red, renderForeground.green, renderForeground.blue);
  }
 
  RGB getRenderBackground() {
    return new RGB(renderBackground.red, renderBackground.green, renderBackground.blue);
  }
 
  boolean isForegroundAnimating() {
    return foregroundAnimator != null;
  }
 
  boolean isBackgroundAnimating() {
    return backgroundAnimator != null;
  }
 
  boolean isBoundsAnimating() {
    return boundsAnimator != null;
  }
 
  private void setForeground(RGB value, boolean animate, TimingTarget listener) {
    if (value == null) {
      throw new NullPointerException();
    }
   
    setForeground(value.red, value.green, value.blue, animate, listener);
  }
 
  private void setForeground(int red, int green, int blue, boolean animate, final TimingTarget listener) {
    if (foreground.red == red && foreground.green == green && foreground.blue == blue) {
      return;
    }
   
    foreground.red = red;
    foreground.green = green;
    foreground.blue = blue;
   
    if (animate) {
      if (isForegroundAnimating()) {
        foregroundAnimator.cancel();
        foregroundAnimator = null;
      }
     
      final RGB from = getRenderForeground();
      final RGB to = new RGB(red, green, blue);
     
      TimingTarget timingTarget = new TimingTargetAdapter() {
        @Override
        public void timingEvent(Animator source, double fraction) {
          int red = (int )Math.round(from.red + (to.red - from.red) * fraction);
          int green = (int )Math.round(from.green + (to.green - from.green) * fraction);
          int blue = (int )Math.round(from.blue + (to.blue - from.blue) * fraction);
          setRenderForeground(red, green, blue);
         
          if (listener != null) {
            listener.timingEvent(source, fraction);
          }
        }
       
        @Override
        public void end(Animator source) {
          setRenderForeground(to);
          foregroundAnimator = null;
         
          if (listener != null) {
            listener.end(source);
          }
        }
      };
     
      Builder builder = new Builder();
      builder.addTarget(timingTarget);
      builder.setInterpolator(new AccelerationInterpolator(0.0, 0.9));
      builder.setDuration(160, TimeUnit.MILLISECONDS);
     
      foregroundAnimator = builder.build();
      foregroundAnimator.start();
    } else {
      setRenderForeground(red, green, blue);
    }
  }
 
  private void setBackground(RGB value, boolean animate, TimingTarget listener) {
    if (value == null) {
      throw new NullPointerException();
    }
   
    setBackground(value.red, value.green, value.blue, animate, listener);
  }
 
  private void setBackground(int red, int green, int blue, boolean animate, final TimingTarget listener) {
    if (background.red == red && background.green == green && background.blue == blue) {
      return;
    }
   
    background.red = red;
    background.green = green;
    background.blue = blue;
   
    if (animate) {
      if (isBackgroundAnimating()) {
        backgroundAnimator.cancel();
        backgroundAnimator = null;
      }
     
      final RGB from = getRenderBackground();
      final RGB to = new RGB(red, green, blue);
     
      TimingTarget timingTarget = new TimingTargetAdapter() {
        @Override
        public void timingEvent(Animator source, double fraction) {
          int red = (int )Math.round(from.red + (to.red - from.red) * fraction);
          int green = (int )Math.round(from.green + (to.green - from.green) * fraction);
          int blue = (int )Math.round(from.blue + (to.blue - from.blue) * fraction);
          setRenderBackground(red, green, blue);
         
          if (listener != null) {
            listener.timingEvent(source, fraction);
          }
        }
       
        @Override
        public void end(Animator source) {
          setRenderBackground(to);
          backgroundAnimator = null;
         
          if (listener != null) {
            listener.end(source);
          }
        }
      };
     
      Builder builder = new Builder();
      builder.addTarget(timingTarget);
      builder.setInterpolator(new AccelerationInterpolator(0.0, 0.9));
      builder.setDuration(160, TimeUnit.MILLISECONDS);
     
      backgroundAnimator = builder.build();
      backgroundAnimator.start();
    } else {
      setRenderBackground(red, green, blue);
    }
  }
 
  private void setRenderBounds(Rectangle value) {
    if (value == null) {
      throw new NullPointerException();
    }
   
    setRenderBounds(value.x, value.y, value.width, value.height);
  }
 
  private void setRenderForeground(RGB value) {
    if (value == null) {
      throw new NullPointerException();
    }
   
    setRenderForeground(value.red, value.green, value.blue);
  }
 
  private void setRenderBackground(RGB value) {
    if (value == null) {
      throw new NullPointerException();
    }
   
    setRenderBackground(value.red, value.green, value.blue);
  }
 
  private void setRenderBounds(int x, int y, int width, int height) {
    if (renderBounds.x == x && renderBounds.y == y && renderBounds.width == width && renderBounds.height == height) {
      return;
    }
   
    Rectangle oldRenderBounds = new Rectangle(renderBounds.x, renderBounds.y, renderBounds.width, renderBounds.height);
   
    renderBounds.x = x;
    renderBounds.y = y;
    renderBounds.width = width;
    renderBounds.height = height;
   
    redraw(oldRenderBounds, renderBounds);
  }
 
  private void setRenderForeground(int red, int green, int blue) {
    if (renderForeground.red == red && renderForeground.green == green && renderForeground.blue == blue) {
      return;
    }
   
    renderForeground.red = red;
    renderForeground.green = green;
    renderForeground.blue = blue;
    redraw(null, renderBounds);
  }
 
  private void setRenderBackground(int red, int green, int blue) {
    if (renderBackground.red == red && renderBackground.green == green && renderBackground.blue == blue) {
      return;
    }
   
    renderBackground.red = red;
    renderBackground.green = green;
    renderBackground.blue = blue;
    redraw(null, renderBounds);
  }
 
  private void redraw(Rectangle oldBounds, Rectangle newBounds) {
    if (oldBounds != null) {
      if (!oldBounds.equals(newBounds)) {
        parent.redraw(oldBounds.x, oldBounds.y, oldBounds.width, oldBounds.height, true);
      }
    }
   
    parent.redraw(newBounds.x, newBounds.y, newBounds.width, newBounds.height, true);
  }
 
  private RGB getForeground(int state) {
    if ((state & DRAGGED) == DRAGGED) {
      return UI.getRGB(SWT.COLOR_WIDGET_FOREGROUND);
    }
   
    if ((state & PRESSED) == PRESSED) {
      return UI.getRGB(SWT.COLOR_WIDGET_LIGHT_SHADOW);
    }
   
    if ((state & SELECTED) == SELECTED) {
      return UI.getRGB(SWT.COLOR_LIST_BACKGROUND);
    }
   
    return UI.getRGB(SWT.COLOR_WIDGET_FOREGROUND);
  }
 
  private RGB getBackground(int state) {
    if ((state & DRAGGED) == DRAGGED) {
      return new RGB(65, 105, 225);
    }
   
    if ((state & PRESSED) == PRESSED) {
      return new RGB(65, 105, 225);
    }
   
    if ((state & SELECTED) == SELECTED) {
      return new RGB(67, 110, 238);
    }
   
    if ((state & FOCUSED) == FOCUSED) {
      return new RGB(72, 118, 255);
    }
   
    return UI.getRGB(SWT.COLOR_WIDGET_BACKGROUND);
  }
}
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