iconitem.java

j2me polish学习的经典代码

					}
					if (scaleY < 0) {
						scaleY = 0;
					}
					g.drawRGB(sData, 0, sWidth, scaleX, scaleY, sWidth, sHeight, true );
				}
			//#endif		
			//#if polish.css.icon-horizontal-adjustment
				x -= this.horizontalAdjustment;
			//#endif
			//#if polish.css.icon-vertical-adjustment
				y -= this.verticalAdjustment;
			//#endif
		}
		super.paintContent(x, y, leftBorder, rightBorder, g);
	}
	
	/**
	 * Retrieves the image of this item.
	 * 
	 * @return the image of this icon.
	 */
	public Image getImage() {
		return this.image;
	}
	
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#setStyle(de.enough.polish.ui.Style)
	 */
	public void setStyle(Style style) {
		super.setStyle(style);
		//#ifdef polish.css.icon-image-align
			Integer align = style.getIntProperty("icon-image-align");
			if (align == null) {
				// keep align setting
			} else {
				switch (align.intValue()) {
					case 0: this.imageAlign = Graphics.LEFT; break; 
					case 1: this.imageAlign = Graphics.RIGHT; break; 
					case 2: this.imageAlign = Graphics.TOP; break; 
					case 3: this.imageAlign = Graphics.BOTTOM; break; 
					case 4: this.imageAlign = Graphics.HCENTER | Graphics.VCENTER; break; 
				}
			}
		//#endif
		//#ifdef polish.css.icon-image
			String imageName = style.getProperty("icon-image");
			if (imageName != null) {
				Item item = this;
				Item container = this.parent;
				while ((container != null) 
						&& !(container instanceof Container) 
						&& (container.parent != null)) 
				{
					item = container;
					container = container.parent;
				}
				if (container instanceof Container) {
					imageName = ((Container) container).parseIndexUrl( imageName, item );
				}
				//#if polish.debug.error
					else if ( imageName.indexOf( "%INDEX%") != -1) {
						throw new IllegalStateException("IconItem cannot resolve %INDEX% in url since parent is not a container: " + container );
					}
				//#endif
				try {
					Image img = StyleSheet.getImage(imageName, this, true);
					if (img != null) {
						this.image = img;
						//#if polish.midp2 && polish.css.scale-factor
							this.rgbData = null;
							this.scaleData = null;
						//#endif
					}
				} catch (IOException e) {
					//#debug error
					System.out.println("unable to load image [" + imageName + "]" + e);
				}
			}
		//#endif
		//#if polish.css.icon-vertical-adjustment
			Integer verticalAdjustmentInt = style.getIntProperty("icon-vertical-adjustment");
			if (verticalAdjustmentInt != null) {
				this.verticalAdjustment = verticalAdjustmentInt.intValue();
			}
		//#endif
		//#if polish.css.icon-horizontal-adjustment
			Integer horizontalAdjustmentInt = style.getIntProperty("icon-horizontal-adjustment");
			if (horizontalAdjustmentInt != null) {
				this.horizontalAdjustment = horizontalAdjustmentInt.intValue();
			}
		//#endif

		//#if polish.midp2	
			//#ifdef polish.css.scale-factor
				Integer scaleFactorInt = style.getIntProperty( "scale-factor" );
				if (scaleFactorInt != null) {
					this.scaleFactor = scaleFactorInt.intValue();
				}
			//#endif
			//#ifdef polish.css.scale-steps
				Integer scaleStepsInt = style.getIntProperty( "scale-steps" );
				if (scaleStepsInt != null) {
					this.scaleSteps = scaleStepsInt.intValue();
				}
			//#endif
		//#endif	
		//#if polish.css.icon-inactive
			Boolean inactiveBool = style.getBooleanProperty("icon-inactive");
			if (inactiveBool != null) {
				if (inactiveBool.booleanValue()) {
					this.appearanceMode = Item.PLAIN;
				} else {
					this.appearanceMode = Item.INTERACTIVE;								
				}
			}
		//#endif

	}

	/**
	 * Loads the specified image.
	 * 
	 * @param url the local URL of the image
	 */
	public void setImage( String url ) {
		try {
			Image img = StyleSheet.getImage(url, this, false);
			if (img != null) {
				setImage( img );
			}
		} catch (IOException e) {
			//#debug error
			System.out.println("unable to load image [" + url + "]" + e);
		}		
	}

	//#ifdef polish.images.backgroundLoad
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.ImageConsumer#setImage(java.lang.String, javax.microedition.lcdui.Image)
	 */
	public void setImage(String name, Image image) {
		this.image = image;
		//System.out.println("image [" + name + "] has been set.");
		if (this.isInitialised) {
			this.isInitialised = false;
			repaint();
		}
	}
	//#endif
	
	/**
	 * Sets the image for this icon.
	 * 
	 * @param image the image for this icon, when null is given, no image is painted.
	 */
	public void setImage( Image image ) {
		setImage( image, null );
	}
	
	/**
	 * Sets the image for this icon.
	 * 
	 * @param img the image for this icon, when null is given, no image is painted.
	 * @param style the new style of this item, is ignored when null
	 */
	public void setImage(Image img, Style style) {
		if (style != null) {
			setStyle( style );
		}
		this.image = img;
		//#if polish.midp2 && polish.css.scale-factor
			this.rgbData = null;
			this.scaleData = null;
		//#endif
		if (this.isInitialised) {	
			this.isInitialised = false;
			repaint();
		}
	}

	
	/**
	 * Sets the image align for this icon.
	 * 
	 * @param imageAlign either Graphics.TOP, Graphics.LEFT, Graphics.BOTTOM or Graphics.RIGHT
	 */
	public void setImageAlign( int imageAlign ) {
		this.imageAlign = imageAlign;
		this.isInitialised = false;
	}
	
	//#if polish.midp2 && polish.css.scale-factor
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#hideNotify()
	 */
	public boolean animate() {
		boolean animated = super.animate();
		if (this.scaleFactor != 0) {
			if (this.scaleFinished || this.image == null) {
				return animated;
			}
			int imgWidth = this.image.getWidth();
			int imgHeight = this.image.getHeight();
			if (this.rgbData == null) {
				this.rgbData = new int[ imgWidth * imgHeight ];
				this.image.getRGB(this.rgbData, 0, imgWidth, 0, 0, imgWidth, imgHeight );
			}
			int step = this.currentStep;
			if (this.scaleDown) {
				step--;
				if (step <= 0) {
					this.scaleFinished =  true;
					this.scaleData = null;
					return true;
				}
			} else {
				step++;
				if (step > this.scaleSteps) {
					this.scaleDown = true;
					return false;
				}
			}
			this.currentStep = step;
			int scaleWidth = imgWidth + ((imgWidth * this.scaleFactor * step) / (this.scaleSteps * 100));
			int scaleHeight = imgHeight + ((imgHeight * this.scaleFactor * step) / (this.scaleSteps * 100));
			//System.out.println("\nstep=" + step + ", scaleSteps=" + this.scaleSteps + "\nscaleWidth=" + this.scaleWidth + ", scaleHeight=" + this.scaleHeight + ", imgWidth=" + imgWidth + ", imgHeight=" + imgHeight + "\n");
			int[] scaledRgbData = ImageUtil.scale( scaleWidth, scaleHeight, imgWidth, 
					imgWidth, imgHeight, this.rgbData);
			Object[] localeScaleData = new Object[]{ scaledRgbData, new Integer( scaleWidth ) };
			// this operation is atomic:
			this.scaleData = localeScaleData;
			return true;
		}
		return animated;
		
	}		
	//#endif

	//#if polish.midp2 && polish.css.scale-factor
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#defocus(de.enough.polish.ui.Style)
	 */
	protected void defocus(Style originalStyle) {
		super.defocus(originalStyle);
		this.scaleFinished = false;
		this.scaleDown = false;
		this.currentStep = 0;
		this.scaleData = null;
	}
	//#endif

	//#if polish.debug.enabled
		public String toString(){
			return "IconItem(" + this.text + ")/" + this;
		}
	//#endif
		
	/**
	 * Releases all (memory intensive) resources such as images or RGB arrays of this item.
	 * The default implementation does release any background resources.
	 */
	public void releaseResources() {
		super.releaseResources();
		//#if polish.midp2 && polish.css.scale-factor
			this.scaleData = null;
		//#endif
		this.image = null;
		this.isStyleInitialised = false;
	}

	
//#ifdef polish.IconItem.additionalMethods:defined
	//#include ${polish.IconItem.additionalMethods}
//#endif

}