choicegroup.java

j2me polish学习的经典代码

	/**
	 * Gets the application's preferred policy for fitting
	 * <code>Choice</code> element contents to the available screen space.  The value returned is the
	 * policy that had been set by the application, even if that value had
	 * been disregarded by the implementation.
	 * 
	 * @return always Choice.TEXT_WRAP_ON
	 * @see Choice#getFitPolicy() in interface Choice
	 * @see #setFitPolicy(int)
	 * @since  MIDP 2.0
	 */
	public int getFitPolicy()
	{
		return Choice.TEXT_WRAP_ON;
	}

	/**
	 * Sets the application's preferred font for
	 * rendering the specified element of this <code>Choice</code>.
	 * An element's font is a hint, and the implementation may disregard
	 * the application's preferred font.
	 * The J2ME Polish implementation uses the font defined by the appropriate
	 * CSS style and ignores the font which is set here.
	 * 
	 * @param elementNum the index of the element, starting from zero
	 * @param font the preferred font to use to render the element
	 * @throws IndexOutOfBoundsException if elementNum is invalid
	 * @see Choice#setFont(int, Font) in interface Choice
	 * @see #getFont(int)
	 * @since  MIDP 2.0
	 */
	public void setFont(int elementNum, Font font)
	{
		ChoiceItem item = (ChoiceItem) this.itemsList.get( elementNum );
		item.setPreferredFont( font );
	}

	/**
	 * Gets the application's preferred font for
	 * rendering the specified element of this <code>Choice</code>. The
	 * value returned is the font that had been set by the application,
	 * even if that value had been disregarded by the implementation.
	 * If no font had been set by the application, or if the application
	 * explicitly set the font to <code>null</code>, the value is the default
	 * font chosen by the implementation.
	 * 
	 * <p> The <code>elementNum</code> parameter must be within the range
	 * <code>[0..size()-1]</code>, inclusive.</p>
	 * 
	 * @param elementNum the index of the element, starting from zero
	 * @return the preferred font to use to render the element
	 * @throws IndexOutOfBoundsException if elementNum is invalid
	 * @see Choice#getFont(int) in interface Choice
	 * @see #setFont(int elementNum, Font font)
	 * @since  MIDP 2.0
	 */
	public Font getFont(int elementNum)
	{
		ChoiceItem item = (ChoiceItem) this.itemsList.get( elementNum );
		Font font = item.preferredFont;
		if (font == null) {
			font = item.font;
		}
		return font;
	}
	//#ifdef polish.usePopupItem
	protected void hideNotify() {
		if (this.isPopup && !this.isPopupClosed) {
			closePopup();
		}
	}
	//#endif

	//#ifdef polish.usePopupItem
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#paint(int, int, javax.microedition.lcdui.Graphics)
	 */
	public void paintContent(int x, int y, int leftBorder, int rightBorder, Graphics g) {
		//#if tmp.supportViewType
			//# if (this.view != null) {
				//# super.paintContent(x, y, leftBorder, rightBorder, g);
			//# }
		//#endif
		if (this.isPopup && this.isPopupClosed) {
			this.popupItem.paintContent(x, y, leftBorder, rightBorder, g);
		} else {
			super.paintContent(x, y, leftBorder, rightBorder, g );
		}
	}
	//#endif
	
	//#ifdef polish.usePopupItem
	protected void init( int firstLineWidth, int lineWidth ) {
		super.init(firstLineWidth, lineWidth);
		//#if tmp.supportViewType
			//# if (this.view != null) {
				//# return;
			//# }
		//#endif
		if (this.isPopup && !this.isPopupClosed) {
			this.backgroundWidth += (this.originalContentWidth - this.contentWidth); 
			this.backgroundHeight += (this.originalContentHeight - this.contentHeight); 
		}
	}
	//#endif


	//#ifdef polish.usePopupItem
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#initItem()
	 */
	protected void initContent(int firstLineWidth, int lineWidth) {
		super.initContent(firstLineWidth, lineWidth);
		//#if tmp.supportViewType
			//# if (this.view != null) {
				//# return;
			//# }
		//#endif
		if (this.isPopup) {
			if (this.popupItem.image == null) {
				this.popupItem.setImage( createPopupImage() );
			}
			if (this.isPopupClosed) {
				if (this.popupItem.getText() == null && this.itemsList.size() > 0) {
					ChoiceItem selectedItem = (ChoiceItem) this.itemsList.get( 0 );
					this.popupItem.setText( selectedItem.getText() );
				}
				if (!this.popupItem.isInitialised) {
					int noneContentWidth = this.marginLeft + this.borderWidth + this.paddingLeft
								+ this.marginRight + this.borderWidth + this.paddingRight;
					this.popupItem.init(firstLineWidth + noneContentWidth, lineWidth + noneContentWidth);
				}
			} else {
				this.originalContentWidth = this.contentWidth;
				this.originalContentHeight = this.contentHeight;
			}
			//this.contentWidth = this.popupItem.contentWidth;			
			this.contentHeight = this.popupItem.contentHeight;
		}
	}
	//#endif

	//#ifdef polish.useDynamicStyles
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#getCssSelector()
	 */
	protected String createCssSelector() {
		return "choicegroup";
	}
	//#endif
		
	//#ifdef polish.usePopupItem
	private void closePopup() {
		this.isPopupClosed = true;
		/*
		int difference = this.popupOpenY - this.yTopPos;
		if (difference > 0 && (this.parent instanceof Container) && (((Container)this.parent).yOffset != 0) ) {	
			//System.out.println("Closing popup: adjusting parent.offset from [" + (((Container)this.parent).yOffset) + "] to [" + (((Container)this.parent).yOffset + difference) + "].");
			((Container)this.parent).yOffset += difference;
		}
		*/
		if (this.parent instanceof Container) {
			((Container)this.parent).yOffset = this.popupParentOpenY;
		}
		/*
		this.internalX = -9999;		
		if (this.yOffset < 0) {
			System.out.println("Closing popup: adjusting ChoiceGroup.offset from [" + this.yOffset + "] to [" + (this.yOffset + (this.contentHeight - this.popupItem.contentHeight)) + "].");
			this.yOffset += (this.contentHeight - this.popupItem.contentHeight);
			if (this.yOffset > 0 ) {
				this.yOffset = 0;
			}
		}
		*/
		requestInit();
	}
	//#endif

	//#ifdef polish.usePopupItem
	private void openPopup() {
		//this.popupOpenY = this.yTopPos; 
		if (this.parent instanceof Container) {
			this.popupParentOpenY = ((Container)this.parent).yOffset;
		}
		this.isPopupClosed = false;
		focus( this.selectedIndex );
		// recalculate the internal positions of the selected choice:
		Item item = this.items[ this.selectedIndex ];
		if (item.yTopPos != item.yBottomPos) {
			// okay, this item has been painted alrady: 
			this.internalY = (item.itemHeight + this.paddingVertical) * this.selectedIndex;
			this.internalHeight = item.itemHeight;
			this.internalX = 0;
			this.internalWidth = item.itemWidth;
		} else {
			this.internalX = 0;
			this.internalY = 0;
			this.internalHeight = this.itemHeight + 20;
			this.internalWidth = this.itemWidth;
		}
	}
	//#endif
	
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#handleKeyPressed(int, int)
	 */
	protected boolean handleKeyPressed(int keyCode, int gameAction) {
		if (this.itemsList.size() == 0) {
			return false;
		}
		//#if polish.ChoiceGroup.handleDefaultCommandFirst == true
			//# if (gameAction == Canvas.FIRE) {
				//#ifdef polish.usePopupItem
					//# if (!this.isPopup || this.isPopupClosed) {
				//#endif
				//#ifndef tmp.suppressAllCommands
					//# if (this.defaultCommand != null && this.additionalItemCommandListener != null) {
						//# this.additionalItemCommandListener.commandAction( this.defaultCommand, this );
						//# return true;
					//# }
				//#else
					//# if (this.defaultCommand != null && this.itemCommandListener != null) {
						//# this.itemCommandListener.commandAction( this.defaultCommand, this );
						//# return true;
					//# }
				//#endif
				//#ifdef polish.usePopupItem
				//# }
				//#endif
			//# }
		//#endif
		boolean processed = false;
		//#ifdef polish.usePopupItem
		if (!(this.isPopup && this.isPopupClosed)) {
			processed = super.handleKeyPressed(keyCode, gameAction);
			//#debug
			//# System.out.println("ChoiceGroup: container handled keyPressEvent: " + processed);
		}
		if (!processed) {
			if ( gameAction == Canvas.FIRE && keyCode != Canvas.KEY_NUM5 ) {
				if (this.isMultiple) {
					ChoiceItem item = (ChoiceItem) this.focusedItem;
					item.toggleSelect();
				} else if (this.isPopup){
					if (this.isPopupClosed) {
						openPopup();
					} else {
						setSelectedIndex(this.focusedIndex, true);
						closePopup();
					}
					requestInit();
				} else {
					setSelectedIndex(this.focusedIndex, true);
					if (this.isImplicit) {
						// call command listener:
						Screen scr = getScreen();
						if (scr != null) {
							Command selectCmd = this.selectCommand;
							if (selectCmd == null) {
								selectCmd = List.SELECT_COMMAND;
							}
							scr.callCommandListener( selectCmd );
						}
					}
				}
				if ( (this.choiceType != IMPLICIT) 
						&& !(this.isPopup && !this.isPopupClosed)
						&& (this.getScreen() instanceof Form) ) {
					notifyStateChanged();
				}
				return true;
			} else {
				//#if polish.Container.dontUseNumberKeys != true
				if (keyCode >= Canvas.KEY_NUM1 && keyCode <= Canvas.KEY_NUM9) {
					int index = keyCode - Canvas.KEY_NUM1;
					if (index < this.itemsList.size()) {
						if (!this.isPopup || !this.isPopupClosed) {
							// either this is not a POPUP or the POPUP is opened:
							setSelectedIndex( index, true );
							if (this.isPopup) {
								closePopup();
							}
							if ( (this.choiceType != IMPLICIT) 
									&& (this.getScreen() instanceof Form) ) {
								notifyStateChanged();
							}
							if (this.isImplicit) {
								// call command listener:
								Screen scr = getScreen();
								if (scr != null) {
									Command selectCmd = this.selectCommand;
									if (selectCmd == null) {
										selectCmd = List.SELECT_COMMAND;
									}
									scr.callCommandListener( selectCmd );
								}
							}
							return true;
						}
					}
				} else if (this.isPopup && (this.isPopupClosed == false)) {
					closePopup();
					return true;
				}
				//#endif
			}
		}
		//#else
		//# // no popup item is used by this application:
		//# processed = super.handleKeyPressed(keyCode, gameAction);
		//# if (!processed) {
			//# if (gameAction == Canvas.FIRE && keyCode != Canvas.KEY_NUM5 && this.focusedIndex != -1 ) {
				//# if (this.isMultiple) {
					//# ChoiceItem item = (ChoiceItem) this.focusedItem;
					//# item.toggleSelect();
				//# } else {
					//# setSelectedIndex(this.focusedIndex, true);
				//# }
				//# if ( (this.choiceType != IMPLICIT) 
						//# && (this.getScreen() instanceof Form) ) 
				//# {
					//# notifyStateChanged();
				//# }
				//# if (this.isImplicit) {
					//# // call command listener:
					//# Screen scr = getScreen();
					//# if (scr != null) {
						//# Command selectCmd = this.selectCommand;
						//# if (selectCmd == null) {
							//# selectCmd = List.SELECT_COMMAND;
						//# }
						//# scr.callCommandListener( selectCmd );
					//# }
				//# }
				//# return true;
			//#if polish.Container.dontUseNumberKeys != true
			//# } else if ( (keyCode >= Canvas.KEY_NUM1) && (keyCode <= Canvas.KEY_NUM9) ) {
				//# int index = keyCode - Canvas.KEY_NUM1;
				//# if (index < this.itemsList.size()) {
					//# setSelectedIndex( index, true );
					//# if ((this.choiceType != IMPLICIT) 
						//# && (this.getScreen() instanceof Form) )