choicegroup.java

j2me polish学习的经典代码

							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) ) 
					{
						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;
				}
			//#endif
			}
		}
		//#endif
		return processed;
	}
	
	//#ifdef polish.hasPointerEvents
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#handlePointerPressed(int, int)
	 */
	protected boolean handlePointerPressed(int x, int y) {
		//#debug
		System.out.println("ChoiceGroup.handlePointerPressed(" + x + ", " + y + ")");
		//#ifndef polish.usePopupItem
			boolean processed = super.handlePointerPressed(x, y);
			int labelHeight = 0;
			if (this.label != null) {
				labelHeight = this.label.itemHeight; // TODO: what if the label is on the same line???
			}
			y -= this.yOffset + this.marginTop + this.paddingTop + labelHeight;
			if (this.focusedItem != null 
					&& ( x >= this.focusedItem.xLeftPos ) 
					&& ( x <= this.focusedItem.xRightPos ) 
					&& ( y >= this.focusedItem.yTopPos ) 
					&& ( y <= this.focusedItem.yBottomPos ) ) 
			{
				return handleKeyPressed( -1, Canvas.FIRE ) || processed;
			}
			//# return processed;
		//#else
			if (!this.isPopup) {
				super.handlePointerPressed(x, y);
				return handleKeyPressed( -1, Canvas.FIRE ); 
			}
			// this is a popup-item:
			if (this.isPopupClosed) {
				focus( this.selectedIndex );
				this.isPopupClosed = false;
			} else {
				y -= this.yOffset + this.marginTop + this.paddingTop;
				// select item at x,y and close this popup:
				// an item within this container was selected:
				Item[] myItems = getItems();
				for (int i = 0; i < myItems.length; i++) {
					Item item = myItems[i];
					if (y < item.yTopPos  || y > item.yBottomPos || x < item.xLeftPos || x > item.xRightPos) {
						// this item is not in the range:
						continue;
					}
					// found out the item:
					setSelectedIndex(i, true);
					if ( getScreen() instanceof Form) {
						notifyStateChanged();
					}
					break;
				}
				closePopup();
			}
			requestInit();
			return true;
		//#endif
	}	
	//#endif

	/**
	 * Sets the select command for this choice group.
	 *
	 * @param command the new select command
	 */
	protected void setSelectCommand(Command command) {
		this.selectCommand = command;
	}
	
	
	//#ifndef tmp.suppressAllCommands
	/**
	 * Sets the command for selecting this (and opening this POPUP) choicegroup.
	 * This implementation only works like described when not all ChoiceGroup command are deactivated
	 * by specifying the <variable name="polish.ChoiceGroup.suppressMarkCommands" value="true"/>
	 * and <variable name="polish.ChoiceGroup.suppressSelectCommand" value="true"/>
	 * preprocessing variables. When all commands are deactivated by the mentioned preprocessing variables,
	 * the implementation of Item is used instead.
	 * 
	 * @param cmd the new command for selecting this choice group
	 */
	public void setDefaultCommand(Command cmd) {
		if (this.choiceType == MULTIPLE) {
			//#ifndef tmp.suppressMarkCommands
				removeCommand( MARK_COMMAND );
			//#endif
		} else {
			//#ifndef tmp.suppressSelectCommand
				removeCommand( List.SELECT_COMMAND );
				if (this.selectCommand != null) {
					removeCommand( this.selectCommand );
				}
			//#endif
		}
		if (this.additionalItemCommandListener == null) {
			this.additionalItemCommandListener = this.itemCommandListener;
		}
		addCommand( cmd );
		this.selectCommand = cmd;
		this.defaultCommand = cmd;
		this.itemCommandListener = this;
	}
	//#endif
	
	//#ifdef polish.usePopupItem
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#defocus(de.enough.polish.ui.Style)
	 */
	public void defocus(Style originalStyle) {
		if (this.isPopup) {
			if (this.isPopupClosed) {
				this.popupItem.setStyle( originalStyle );
			} else {
				this.isPopupClosed = true;
				requestInit();
			}
			setStyle( originalStyle );
			// now remove any commands which are associated with this item:
			Screen scr = getScreen();
			if (scr != null) {
				scr.removeItemCommands(this);
			}
			// change the label-style of this container:
			//#ifdef polish.css.label-style
				Style tmpLabelStyle = null;
				if ( originalStyle != null) {
					tmpLabelStyle = (Style) originalStyle.getObjectProperty("label-style");
				}
				if (tmpLabelStyle == null) {
					tmpLabelStyle = StyleSheet.labelStyle;
				}
				if (this.label != null && tmpLabelStyle != null && this.label.style != tmpLabelStyle) {
					this.label.setStyle( tmpLabelStyle );
				}
			//#endif
		} else {
			super.defocus(originalStyle);
		}
	}
	//#endif

	//#ifdef polish.usePopupItem	
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#focus(de.enough.polish.ui.Style, int)
	 */
	protected Style focus(Style focusStyle, int direction) {
		if (this.isPopup && this.isPopupClosed) {
			if (this.focusedStyle != null) {
				focusStyle = this.focusedStyle;
			}
			Style original = this.style;
			this.popupItem.setStyle( focusStyle );
			setStyle( focusStyle );
			// now remove any commands which are associated with this item:
			Screen scr = getScreen();
			if (scr != null) {
				scr.setItemCommands(this);
			}
			// change the label-style of this container:
			//#ifdef polish.css.label-style
				if (this.label != null) {
					Style labStyle = (Style) focusStyle.getObjectProperty("label-style");
					if (labStyle != null) {
						this.labelStyle = this.label.style;
						this.label.setStyle( labStyle );
					}
				}
			//#endif
			return original;
		} else {
			return super.focus(focusStyle, direction);
		}
	}
	//#endif

	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Container#setStyle(de.enough.polish.ui.Style, boolean)
	 */
	public void setStyle(Style style, boolean ignoreBackground) {
		super.setStyle(style, ignoreBackground);
		//#ifdef polish.usePopupItem
			if (this.isPopup && this.popupItem != null) {
				this.popupItem.setStyle( style );
			}
			if (this.isPopup && this.popupItem.image == null ) {
				//#ifdef polish.css.popup-image
					String url = style.getProperty("popup-image");
					if (url != null ) {
						this.popupItem.setImage( url );
					}
				//#endif
				//#ifdef polish.css.popup-color
					Integer color = style.getIntProperty("popup-color");
					if (color != null) {
						this.popupColor = color.intValue();
					}
				//#endif
				//#ifdef polish.css.popup-background-color
					Integer bgColor = style.getIntProperty("popup-background-color");
					if (bgColor != null) {
						this.popupBackgroundColor = bgColor.intValue();
					}
				//#endif
				//#if ! tmp.suppressSelectCommand && polish.css.view-type
					if (!this.isSelectCommandAdded && this.choiceType == EXCLUSIVE && this.view == null) {
						if (this.selectCommand != null) {
							addCommand( this.selectCommand );
						} else {
							addCommand( List.SELECT_COMMAND );
						}
						this.isSelectCommandAdded = true;				
					}
				//#endif
			}
		//#endif
		//#ifndef tmp.suppressAllCommands
		if (this.choiceType == MULTIPLE) {
			//#ifndef tmp.suppressMarkCommands
				//#ifdef polish.i18n.useDynamicTranslations
					String cmdLabel = Locale.get("polish.command.mark");
					if (cmdLabel != MARK_COMMAND.getLabel()) {
						MARK_COMMAND = new Command( cmdLabel, Command.ITEM, 9 );
					}
					cmdLabel = Locale.get("polish.command.unmark");
					if (cmdLabel != UNMARK_COMMAND.getLabel()) {
						UNMARK_COMMAND = new Command( cmdLabel, Command.ITEM, 10 );
					}
				//#endif					
				addCommand( MARK_COMMAND );
				addCommand( UNMARK_COMMAND );
			//#endif
		} else if (this.choiceType == EXCLUSIVE){
			//#if !tmp.suppressSelectCommand
				//#if polish.css.view-type
					if (this.view == null) {
				//#endif
					//#ifdef polish.i18n.useDynamicTranslations
						String cmdLabel = Locale.get("polish.command.select");
						if (cmdLabel != List.SELECT_COMMAND.getLabel()) {
							List.SELECT_COMMAND = new Command( cmdLabel, Command.ITEM, 3 );
						}
					//#endif
					addCommand( List.SELECT_COMMAND );
				//#if polish.css.view-type
					}
				//#endif
			//#endif
		}
		this.itemCommandListener = this;
	//#endif
	}

	//#ifndef tmp.suppressAllCommands
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.ItemCommandListener#commandAction(javax.microedition.lcdui.Command, de.enough.polish.ui.Item)
	 */
	public void commandAction(Command c, Item item) {
		//#if tmp.allowSelectCommand && tmp.allowMarkCommands
		if (c == List.SELECT_COMMAND || c == MARK_COMMAND || c == this.selectCommand  ) {
		//#elif tmp.allowSelectCommand
			//# if (c == List.SELECT_COMMAND || c == this.selectCommand ) {
		//#elif tmp.allowMarkCommands
			//# if (c == MARK_COMMAND || c == this.selectCommand ) {
		//#else
			//#abort Invalid combination of suppressed commands for a ChoiceGroup!
			//# if (false) {
		//#endif
			if (this.focusedIndex != -1) {
				setSelectedIndex( this.focusedIndex, true );
				if ( (this.choiceType != IMPLICIT) 
						//#ifdef polish.usePopupItem
						&& !(this.isPopup && !this.isPopupClosed)
						//#endif
						&& (this.getScreen() instanceof Form) ) {
					notifyStateChanged();
				}
				//#ifdef polish.usePopupItem
					if (this.isPopup) {
						if (this.isPopupClosed) {
							openPopup();
						} else {
							closePopup();
						}
						repaint();
					}
				//#endif
			}
			//#ifdef polish.usePopupItem
				else if (this.isPopup && this.isPopupClosed) {
					openPopup();				
				}
			//#endif
		//#ifdef tmp.allowMarkCommands
		} else if (c == UNMARK_COMMAND ) {
			if (this.focusedIndex != -1) {
				setSelectedIndex( this.focusedIndex, false );
				if ( (this.choiceType != IMPLICIT) 
						//#ifdef polish.usePopupItem
						&& !(this.isPopup && !this.isPopupClosed)
						//#endif
						&& (this.getScreen() instanceof Form) ) {
					notifyStateChanged();
				}
			}
		//#endif
		} else if (this.additionalItemCommandListener != null) {
			this.additionalItemCommandListener.commandAction(c, item);
		}
	}
	//#endif
	
	//#ifndef tmp.suppressAllCommands
	public void setItemCommandListener(ItemCommandListener l) {
		this.additionalItemCommandListener = l;
	}
	//#endif


}