exclusivesinglelineview.java

j2me is based on j2mepolish, client & server for mobile application. menu sample

//# //				} else {
//# //					this.arrowPadding = style.paddingHorizontal;
				//# }
			//#endif
		//#endif
		//#ifdef polish.css.exclusiveview-roundtrip
			//# Boolean allowRoundTripBool = style.getBooleanProperty(127);
			//# if (allowRoundTripBool != null) {
				//# this.allowRoundTrip = allowRoundTripBool.booleanValue();
			//# }
		//#endif

	}
	
	
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.ContainerView#paintContent(int, int, int, int, javax.microedition.lcdui.Graphics)
	 */
	protected void paintContent(Item parent, int x, int y, int leftBorder, int rightBorder,
			Graphics g) 
	{
		//#debug
		//# System.out.println("ExclusiveView.start: x=" + x + ", y=" + y + ", leftBorder=" + leftBorder + ", rightBorder=" + rightBorder );
		this.xStart = x;
		int modifiedX = x;
		//#ifdef polish.css.exclusiveview-expand-background
			//# if (this.expandBackground && this.background != null) {
				//# if (this.currentItem != null && this.currentItem.background == this.background) {
					//# this.currentItem.background = null;
				//# }
				//# //this.background.paint(x, y, this.contentWidth, this.contentHeight, g);
				//# this.background.paint(leftBorder, y, rightBorder-leftBorder, this.contentHeight, g);
			//# }
		//#endif

		//#ifdef polish.css.exclusiveview-arrow-position
			//# if (this.arrowPosition == POSITION_BOTH_SIDES ) {
		//#endif
				modifiedX += this.arrowWidth + this.paddingHorizontal;
				leftBorder += this.arrowWidth + this.paddingHorizontal;
		//#ifdef polish.css.exclusiveview-arrow-position
			//# } else if (this.arrowPosition == POSITION_LEFT ) {
				//# modifiedX += (this.arrowWidth + this.paddingHorizontal) << 1;
				//# leftBorder += (this.arrowWidth + this.paddingHorizontal) << 1;
			//# }
		//#endif	
				

		//#ifdef polish.css.exclusiveview-arrow-position
			//# if (this.arrowPosition == POSITION_BOTH_SIDES ) {
		//#endif
				rightBorder -= this.arrowWidth + this.paddingHorizontal;
		//#ifdef polish.css.exclusiveview-arrow-position
			//# } else if (this.arrowPosition == POSITION_RIGHT ) {
				//# rightBorder -= (this.arrowWidth + this.paddingHorizontal) << 1;
			//# }
		//#endif

		
		//#debug
		//# System.out.println("ExclusiveView.item: x=" + modifiedX + ", y=" + y + ", leftBorder=" + leftBorder + ", rightBorder=" + rightBorder + ", availableWidth=" + (rightBorder - leftBorder) + ", itemWidth=" + this.currentItem.itemWidth  );
		if (this.currentItem != null) {
			this.currentItem.paint(modifiedX, y, leftBorder, rightBorder, g);
		}

		g.setColor( this.arrowColor );
		//draw left arrow:
		//#ifdef polish.css.exclusiveview-roundtrip
			//# if (this.allowRoundTrip || this.currentItemIndex > 0) {
		//#else
			if (this.currentItemIndex > 0) {
		//#endif
			// draw left arrow
			int startX = x + this.leftArrowStartX;
			if (startX >= rightBorder) {
				//TODO this is  a hack for cases where the label is staying on the same line as this view:
				startX = rightBorder - (this.arrowWidth << 1);
			}
			
			//#ifdef polish.css.exclusiveview-left-arrow
				//# if (this.leftArrow != null) {
					//# //System.out.println("Drawing left IMAGE arrow at " + startX );
					//# g.drawImage( this.leftArrow, startX, y + this.leftYOffset, Graphics.LEFT | Graphics.TOP );
				//# } else {
			//#endif
				//#if polish.midp2
					//# //System.out.println("Drawing left triangle arrow at " + startX );
					//# g.fillTriangle( 
							//# startX, y + this.contentHeight/2, 
							//# startX + this.arrowWidth, y,
							//# startX + this.arrowWidth, y + this.contentHeight );
				//#else
					int y1 = y + this.contentHeight / 2;
					int x2 = startX + this.arrowWidth;
					int y3 = y + this.contentHeight;
					g.drawLine( startX, y1, x2, y );
					g.drawLine( startX, y1, x2, y3 );
					g.drawLine( x2, y, x2, y3 );
				//#endif
			//#ifdef polish.css.exclusiveview-left-arrow
				//# }
			//#endif
		}
		
		// draw right arrow:
		//#ifdef polish.css.exclusiveview-roundtrip
			//# if (this.allowRoundTrip ||  (this.currentItemIndex < this.parentContainer.size() - 1) ) {
		//#else
			if (this.currentItemIndex < this.parentContainer.size() - 1) {
		//#endif
			// draw right arrow
			int startX = x + this.rightArrowStartX;
			if (startX >= rightBorder) {
				//TODO this is  a hack for cases where the label is staying on the same line as this view:
				startX = rightBorder; // - this.arrowWidth;
			}
			//#ifdef polish.css.exclusiveview-right-arrow
				//# if (this.rightArrow != null) {
					//# g.drawImage( this.rightArrow, startX, y + this.rightYOffset, Graphics.LEFT | Graphics.TOP );
				//# } else {
			//#endif
				//#if polish.midp2
					//# g.fillTriangle( 
							//# startX + this.arrowWidth, y + this.contentHeight/2, 
							//# startX, y,
							//# startX, y + this.contentHeight );
				//#else
					int y1 = y + this.contentHeight / 2;
					int x2 = startX + this.arrowWidth;
					int y3 = y + this.contentHeight;
					g.drawLine( x2, y1, startX, y );
					g.drawLine( x2, y1, startX, y3 );
					g.drawLine( startX, y, startX, y3 );
				//#endif
			//#ifdef polish.css.exclusiveview-right-arrow
				//# }
			//#endif
		}
	}

	/* (non-Javadoc)
	 * @see de.enough.polish.ui.ContainerView#getNextItem(int, int)
	 */
	protected Item getNextItem(int keyCode, int gameAction) {
		//#debug
		//# System.out.println("ExclusiveSingleLineView: getNextItem()");
		ChoiceGroup choiceGroup = (ChoiceGroup) this.parentContainer;
		Item[] items = this.parentContainer.getItems();
		if (this.currentItem == null) {
			//#debug warn
			//# System.out.println("ExclusiveSingleLineView: getNextItem(): no current item defined, it seems the initContent() has been skipped.");
			this.currentItemIndex = choiceGroup.getSelectedIndex();
			this.currentItem = (ChoiceItem) items[ this.currentItemIndex ];
		}
		Item lastItem = this.currentItem;
		//ChoiceItem currentItem = (ChoiceItem) items[ this.currentItemIndex ];
	
		//#ifdef polish.css.exclusiveview-roundtrip
			//# if ( gameAction == Canvas.LEFT && (this.allowRoundTrip || this.currentItemIndex > 0 )) {
		//#else
			if ( gameAction == Canvas.LEFT && this.currentItemIndex > 0 ) {
		//#endif
			this.currentItem.select( false );
			this.currentItemIndex--;
			//#ifdef polish.css.exclusiveview-roundtrip
				//# if (this.currentItemIndex < 0) {
					//# this.currentItemIndex = items.length - 1;
				//# }
			//#endif
			this.currentItem = (ChoiceItem) items[ this.currentItemIndex ];
			this.currentItem.adjustProperties( lastItem );
			//this.currentItem.select( true );
			choiceGroup.setSelectedIndex( this.currentItemIndex, true );
			choiceGroup.notifyStateChanged();
			
			return this.currentItem;
		//#ifdef polish.css.exclusiveview-roundtrip
			//# } else if ( gameAction == Canvas.RIGHT && (this.allowRoundTrip || this.currentItemIndex < items.length - 1  )) {
		//#else
			} else if ( gameAction == Canvas.RIGHT && this.currentItemIndex < items.length - 1 ) {
		//#endif
			this.currentItem.select( false );
			this.currentItemIndex++;
			//#ifdef polish.css.exclusiveview-roundtrip
				//# if (this.currentItemIndex >= items.length) {
					//# this.currentItemIndex = 0;
				//# }
			//#endif
			this.currentItem = (ChoiceItem) items[ this.currentItemIndex ];
			this.currentItem.adjustProperties( lastItem );
			choiceGroup.setSelectedIndex( this.currentItemIndex, true );
			choiceGroup.notifyStateChanged();
			//this.currentItem.select( true );
			
			return this.currentItem;
		}
		// in all other cases there is no next item:
		return null;
	}

	//#ifdef polish.hasPointerEvents
	//# /**
	 //# * Handles pointer pressed events.
	 //# * This is an optional feature that doesn't need to be implemented by subclasses.
	 //# * 
	 //# * @param x the x position of the event
	 //# * @param y the y position of the event
	 //# * @return true when the event has been handled. When false is returned the parent container
	 //# *         will forward the event to the affected item.
	 //# */
	//# public boolean handlePointerPressed(int x, int y) {
		//# if (y < 0 || y > this.contentHeight ) {
			//# return false;
		//# }
		//# Item[] items = this.parentContainer.getItems();
		//# this.currentItem.select( false );
		//# x -= this.xStart;
		//# int index = this.currentItemIndex;
		//# if ( (index > 0 || this.allowRoundTrip) && x >= this.leftArrowStartX  && x <= this.leftArrowEndX ) {
			//# index--;
			//# if (index < 0) {
				//# index = items.length - 1;
			//# }
		//# } else if (! (x >= this.leftArrowStartX  && x <= this.leftArrowEndX && index > 0)) {
			//# index = ( index + 1) % items.length;
		//# }
		//# this.currentItemIndex = index;
		//# this.currentItem = (ChoiceItem) items[ index ];
		//# //this.currentItem.select( true );
		//# ((ChoiceGroup) this.parentContainer).setSelectedIndex( this.currentItemIndex, true );
		//# this.parentContainer.focus(this.currentItemIndex, this.currentItem, 0);
		//# this.parentContainer.notifyStateChanged();
		//# return true;
	//# }
	//#endif

	/* (non-Javadoc)
	 * @see de.enough.polish.ui.ContainerView#defocus(de.enough.polish.ui.Style)
	 */
	protected void defocus(Style originalStyle) {
		//System.out.println("DEFOCUSING ExclusiveSingleLineView " + this.parentContainer.getLabel());
		if (this.parentBackground != null ) {
			this.parentContainer.background = this.parentBackground;
			this.parentBackground = null;
		}
		//#ifdef polish.css.exclusiveview-expand-background
			//# if (this.expandBackground) {
				//# this.background = null;
			//# }
		//#endif		
		super.defocus(originalStyle);
	}

	/* (non-Javadoc)
	 * @see de.enough.polish.ui.ContainerView#focus(de.enough.polish.ui.Style, int)
	 */
	public void focus(Style focusstyle, int direction) {
		//System.out.println("FOCUSING ExclusiveSingleLineView " + this.parentContainer.getLabel());
		Background bg = this.parentContainer.background;
		if (bg != null) {
			this.parentBackground = bg; 
			this.parentContainer.background = null;
		}
		super.focus(focusstyle, direction);
	}
	
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.ItemView#isValid(de.enough.polish.ui.Item, de.enough.polish.ui.Style)
	 */
	protected boolean isValid(Item parent, Style style) {
		return (parent instanceof ChoiceGroup);
	}

}