screen.java

j2me polish学习的经典代码

				// paint border:
				if (this.border != null) {
	//				//#ifdef tmp.menuFullScreen
	//					this.border.paint(this.marginLeft, this.marginTop, sWidth, this.screenHeight - this.marginBottom - this.marginTop, g);
	//				//#else
						this.border.paint(leftBorder, this.marginTop, sWidth, sHeight, g);
	//				//#endif
				}
				
				//#if polish.ScreenInfo.enable == true
					//# ScreenInfo.paint( g, topHeight, this.screenWidth );
				//#endif
					
				// paint menu in full-screen mode:
				int menuLeftX = 0;
				int menuRightX = this.screenWidth;
				int menuY = this.screenHeight; // + this.marginBottom;
				//#if polish.css.separate-menubar
					//# if (!this.separateMenubar) {
						//# menuLeftX = leftBorder;
						//# menuRightX = rightBorder;
						//# menuY = this.screenHeight - this.marginBottom;
					//# }
				//#endif
				//#ifdef tmp.menuFullScreen
					//#ifdef tmp.useExternalMenuBar
						//# this.menuBar.paint(menuLeftX, menuY, menuLeftX, menuRightX, g);
						//#if !tmp.useScrollBar
							//# if (this.menuBar.isOpened) {
								//# this.paintScrollIndicator = this.menuBar.paintScrollIndicator;
								//# this.paintScrollIndicatorUp = this.menuBar.canScrollUpwards;
								//# this.paintScrollIndicatorDown = this.menuBar.canScrollDownwards;
							//# }
						//#endif
					//#else
						if (this.menuOpened) {
							topHeight -= this.infoHeight;
							int menuHeight = this.menuContainer.getItemHeight(this.screenWidth, this.screenWidth);
							int y = this.originalScreenHeight - (menuHeight + 1);
							if (y < topHeight) {
								//#if !tmp.useScrollBar
								this.paintScrollIndicator = true;
								this.paintScrollIndicatorUp = (this.menuContainer.yOffset != 0);
								this.paintScrollIndicatorDown = ( (this.menuContainer.focusedIndex != this.menuContainer.size() - 1)
										&& (this.menuContainer.yOffset + menuHeight > this.originalScreenHeight - topHeight)) ;
								//#endif
								y = topHeight; 
							//#if !tmp.useScrollBar
							} else {
								this.paintScrollIndicator = false;
							//#endif
							}
							this.menuContainer.setVerticalDimensions(topHeight, this.originalScreenHeight);
							g.setClip(0, topHeight, this.screenWidth, this.originalScreenHeight - topHeight );
							this.menuContainer.paint(menuLeftX, y, menuLeftX, menuLeftX + this.screenWidth, g);
						 	g.setClip(0, 0, this.screenWidth, this.fullScreenHeight );
						} 
						if (this.showTitleOrMenu || this.menuOpened) {
							// clear menu-bar:
							if (this.menuBarColor != Item.TRANSPARENT) {
								g.setColor( this.menuBarColor );
								//TODO check use menuY instead of this.originalScreenHeight?
								g.fillRect(menuLeftX, this.originalScreenHeight, menuRightX,  this.menuBarHeight );
							}
							if (this.menuContainer != null && this.menuContainer.size() > 0) {
								String menuText = null;
								if (this.menuOpened) {
									//#ifdef polish.i18n.useDynamicTranslations
										//# menuText = "Select"; 
									//#elifdef polish.command.select:defined
menuText = "Select";
									//#else
										//# menuText = "Select";
									//#endif
								} else {
									if (this.menuSingleLeftCommand != null) {
										menuText = this.menuSingleLeftCommand.getLabel();
									} else {
										//#ifdef polish.i18n.useDynamicTranslations
											//# menuText = "Options"; 
										//#elifdef polish.command.options:defined
menuText = "Options";
										//#else
											//# menuText = "Options";				
										//#endif
									}
								}
								//#ifdef polish.Menu.MarginLeft:defined
									//#= int menuLeftX += ${polish.Menu.MarginLeft};
								//#else
									menuLeftX += 2;
								//#endif
								//#ifdef polish.hasPointerEvents
									//# this.menuLeftCommandX = menuLeftX + this.menuFont.stringWidth( menuText );
								//#endif
								g.setColor( this.menuFontColor );
								g.setFont( this.menuFont );
								//#ifdef polish.Menu.MarginTop:defined
									//#= g.drawString(menuLeftX, menuX, this.originalScreenHeight + ${polish.Menu.MarginTop}, Graphics.TOP | Graphics.LEFT );
								//#else
									g.drawString(menuText, menuLeftX, this.originalScreenHeight + 2, Graphics.TOP | Graphics.LEFT );
								//#endif
								if ( this.menuOpened ) {
									// draw cancel string:
									//#ifdef polish.i18n.useDynamicTranslations
										//# menuText = "Cancel"; 
									//#elifdef polish.command.cancel:defined
menuText = "Cancel";
									//#else
										//# menuText = "Cancel";
									//#endif
									//#ifdef polish.Menu.MarginRight:defined
										//#= menuRightX -= ${polish.Menu.MarginRight};
									//#elifdef polish.Menu.MarginLeft:defined
										//# menuRightX -= 2;
									//#endif
									//#ifdef polish.Menu.MarginTop:defined
										//#= g.drawString(menuText, menuRightX, this.originalScreenHeight + ${polish.Menu.MarginTop}, Graphics.TOP | Graphics.RIGHT );
									//#else
										g.drawString(menuText, menuRightX, this.originalScreenHeight + 2, Graphics.TOP | Graphics.RIGHT );
									//#endif
									//#ifdef polish.hasPointerEvents
										//# this.menuRightCommandX = menuRightX - this.menuFont.stringWidth( menuText );
									//#endif
								}
							}
							if (this.menuSingleRightCommand != null && !this.menuOpened) {
								g.setColor( this.menuFontColor );
								g.setFont( this.menuFont );
								String menuText = this.menuSingleRightCommand.getLabel();
								//#ifdef polish.Menu.MarginRight:defined
									//#= menuRightX -= ${polish.Menu.MarginRight};
								//#elifdef polish.Menu.MarginLeft:defined
									//# menuRightX -= 2;
								//#endif
								//#ifdef polish.Menu.MarginTop:defined
									//#= g.drawString(menuText, menuRightX, this.originalScreenHeight + ${polish.Menu.MarginTop}, Graphics.TOP | Graphics.RIGHT );
								//#else
									g.drawString(menuText, menuRightX, this.originalScreenHeight + 2, Graphics.TOP | Graphics.RIGHT );
								//#endif
								//#ifdef polish.hasPointerEvents
									//# this.menuRightCommandX = menuRightX - this.menuFont.stringWidth( menuText );
								//#endif
							}
						} // if this.showTitleOrMenu || this.menuOpened
					//#endif
				//#endif
						
				//#if !tmp.useScrollBar
					// paint scroll-indicator in the middle of the menu:					
					if (this.paintScrollIndicator) {
						g.setColor( this.scrollIndicatorColor );
						int x = this.scrollIndicatorX;
						int y = this.scrollIndicatorY;
						//System.out.println("paint: this.scrollIndicatorY=" + this.scrollIndicatorY);
						int width = this.scrollIndicatorWidth;
						int halfWidth = width / 2;
						if (this.paintScrollIndicatorUp) {
							//#if polish.css.scrollindicator-up-image
								//# if (this.scrollIndicatorUpImage != null) {
									//# g.drawImage(this.scrollIndicatorUpImage, x, y, Graphics.LEFT | Graphics.TOP );
								//# } else {
							//#endif						
								//#ifdef polish.midp2
									g.fillTriangle(x, y + halfWidth-1, x + width, y + halfWidth-1, x + halfWidth, y );
								//#else
									//# g.drawLine( x, y + halfWidth-1, x + width, y + halfWidth-1 );
									//# g.drawLine( x, y + halfWidth-1, x + halfWidth, y );
									//# g.drawLine( x + width, y + halfWidth-1, x + halfWidth, y );
								//#endif
							//#if polish.css.scrollindicator-up-image
								//# }
							//#endif
						}
						if (this.paintScrollIndicatorDown) {
							//#if polish.css.scrollindicator-down-image
								//# if (this.scrollIndicatorDownImage != null) {
									//#if polish.css.scrollindicator-down-image
										//# if (this.scrollIndicatorUpImage != null) {
											//# y += this.scrollIndicatorUpImage.getHeight() + 1;
										//# } else {
											//# y += halfWidth;
										//# }
									//#else
										//# y += halfWidth;
									//#endif
									//# g.drawImage(this.scrollIndicatorDownImage, x, y, Graphics.LEFT | Graphics.TOP );
								//# } else {
							//#endif						
								//#ifdef polish.midp2
									g.fillTriangle(x, y + halfWidth+1, x + width, y + halfWidth+1, x + halfWidth, y + width );
								//#else
									//# g.drawLine( x, y + halfWidth+1, x + width, y + halfWidth+1 );
									//# g.drawLine( x, y + halfWidth+1, x + halfWidth, y + width );
									//# g.drawLine(x + width, y + halfWidth+1, x + halfWidth, y + width );
								//#endif
							//#if polish.css.scrollindicator-down-image
								//# }
							//#endif
						}
					}
				//#endif
				//#ifdef polish.css.foreground-image
					//# if (this.foregroundImage != null) {
						//# g.drawImage( this.foregroundImage, this.foregroundX, this.foregroundY, Graphics.TOP | Graphics.LEFT  );
					//# }
				//#endif
			
			//#if polish.debug.error
			} catch (RuntimeException e) {
				//#debug error
de.enough.polish.util.Debug.debug("error", "de.enough.polish.ui.Screen", 1540, "unable to paint screen (" + getClass().getName() + "):", e );
			}
			//#endif
		}
	}
	
	/**
	 * Paints the screen.
	 * This method also needs to set the protected variables
	 * paintScrollIndicator, paintScrollIndicatorUp and paintScrollIndicatorDown.
	 * 
	 * @param g the graphics on which the screen should be painted
	 * @see #contentX
	 * @see #contentY
	 * @see #contentWidth
	 * @see #contentHeight
	 * @see #paintScrollIndicator
	 * @see #paintScrollIndicatorUp
	 * @see #paintScrollIndicatorDown
	 */
	protected void paintScreen( Graphics g ) {
		int y = this.contentY;
		int x = this.contentX;
		int height = this.contentHeight;
		int width = this.contentWidth;
		int containerHeight = this.container.getItemHeight( width, width);
		//#if !tmp.useScrollBar
			this.paintScrollIndicator = false; // defaults to false
		//#endif
		if (containerHeight > height ) {
			//#if !tmp.useScrollBar
				this.paintScrollIndicator = true;
				this.paintScrollIndicatorUp = (this.container.yOffset != 0);
					//&& (this.container.focusedIndex != 0);
				this.paintScrollIndicatorDown = ( (this.container.focusedIndex != this.container.size() - 1)
						 && (this.container.yOffset + containerHeight > height) );
			//#endif
		} else if (this.isLayoutVCenter) {
			/*
			//#debug
de.enough.polish.util.Debug.debug("debug", "de.enough.polish.ui.Screen", 1580, "Screen: adjusting y from [" + y + "] to [" + ( y + (height - containerHeight) / 2) + "] - containerHeight=", containerHeight);
			*/
			if (this.isLayoutVerticalShrink) {
				y = g.getClipY();
			} else {
				y += ((height - containerHeight) / 2);
			}
		} else if (this.isLayoutBottom) {
			if (this.isLayoutVerticalShrink) {
				y = g.getClipY();
			} else {
				y += (height - containerHeight);
			}
//			System.out.println("content: y=" + y + ", contentY=" + this.contentY + ", contentHeight="+ this.contentHeight + ", containerHeight=" + containerHeight);
		}
		int containerWidth = this.container.itemWidth;
		if (this.isLayoutCenter) {
			int diff = (width - containerWidth) / 2;
			x += diff;
			width -= (width - containerWidth);
		} else if (this.isLayoutRight) {
			int diff = width - containerWidth;
			x += diff;
			width -= diff;
		}
		this.containerX = x;
		this.containerY = y;
		//System.out.println("content: x=" + x + ", rightBorder=" + (x + width) );
		this.container.paint( x, y, x, x + width, g );
	}
	
	//#ifdef tmp.usingTitle
	/**
	 * Gets the title of the Screen. 
	 * Returns null if there is no title.
	 * 
	 * @return the title of this screen
	 */
	public String getTitle()
	{
		if (this.title == null) {
			return null;
		} else if ( !(this.title instanceof StringItem ) ) {
			return null;
		} else {
			return ((StringItem)this.title).getText();
		}
	}
	//#endif

	//#ifdef tmp.usingTitle
	/**
	 * Sets the title of the Screen. If null is given, removes the title.
	 * 
	 * If the Screen is physically visible, the visible effect
	 * should take place no later than immediately
	 * after the callback or
	 * <A HREF="../../../javax/microedition/midlet/MIDlet.html#startApp()"><CODE>startApp</CODE></A>
	 * returns back to the implementation.
	 * 
	 * @param s - the new title, or null for no title
	 */
	public void setTitle( String s)
	{
		setTitle( s, null );
	}
	//#endif
	
	//#ifdef tmp.usingTitle
	/**
	 * Sets the title of the Screen. If null is given, removes the title.
	 * 
	 * If the Screen is physically visible, the visible effect
	 * should take place no later than immediately
	 * after the callback or
	 * <A HREF="../../../javax/microedition/midlet/MIDlet.html#startApp()"><CODE>startApp</CODE></A>
	 * returns back to the implementation.
	 * 
	 * @param text the new title, or null for no title
	 * @param tStyle the new style f