popmenu.java

最强手机阅读器Anyview3.0版的界面代码

package com.ismyway.fairyui;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Graphics;

import com.ismyway.anyview.Anyview;
import com.ismyway.anyview.others.Settings;
import com.ismyway.util.Theme;

public class PopMenu extends Panel {
	private static int itemHeight;
	private MenuItem[] items = null;
	public int currentIndex = 0;
	public int topIndex = 0;
	private int maxItem = 6;
	private Callback callbackPop = null;
	public static boolean alignLeft = true;
	private static int itemspace = Anyview.hasPointerEvents ? 8 : 4;

	public PopMenu(Callback panel, MenuItem[] items) {
		callbackPop = panel;
		this.items = items;
	}

	private static String getMenuTitle(MenuItem item) {
		return item.getText();
	}

	public final static boolean hasSubMenu(MenuItem item) {
		return item.getSubItems() != null;
	}

	/**
	 * 取得当前菜单项最大的宽度
	 * @return
	 */
	private int getMaxMenuWidth() {
		int maxWidth = 0;
		for (int i = 0; i < items.length; i++) {
			MenuItem item = items[i];
			String title = getMenuTitle(item);
			boolean hasSubMenu = hasSubMenu(item);
			int len = 0;
			if (hasSubMenu) {
				len = getFont().stringWidth(title) + 8;
			} else {
				len = getFont().stringWidth(title);
			}
			if (len > maxWidth) {
				maxWidth = len;
			}
		}

		int w = 0;
		w = maxWidth + Settings.MENUSIDEBARWIDTH + Settings.MENUITEMRPAD;
		return w;

	}

	public char getShortcutChar(int index) {
		int num = index + 1;
		if (num <= 9) {
			return Integer.toString(num).charAt(0);
		} else if (num == 10) {
			return '*';
		} else if (num == 11) {
			return '#';
		} else {
			return ' ';
		}
	}

	/**
	 * 向缓冲中绘制
	 * @param g
	 * @param adjustx 左坐标的调整值
	 * @param adjusty 顶点坐标的调整值
	 */
	public void paint(Graphics g, int adjustx, int adjusty) {
		//System.out.println("popup menu " + adjustx + ", " + adjusty);
		if (null == items) {
			return;
		}

		g.setColor(Theme.Background);
		g.fillRect(getLeft() - adjustx, getTop() - adjusty, getWidth(), getHeight());
		g.setColor(Theme.BorderColor);
		g.drawRect(getLeft() - adjustx, getTop() - adjusty, getWidth() - 1, getHeight() - 1);
		g.setColor(Theme.ComponentLight);
		g.fillRect(getLeft() - adjustx + 1, getTop() - adjusty + 1, Settings.MENUSIDEBARWIDTH, getHeight() - 2);

		int menuHeight = itemHeight * items.length;

		if (menuHeight > getHeight()) {
			for (int i = 0; i < maxItem; i++) {
				paintItem(g, i + topIndex, adjustx, adjusty - 5);
			}

			int tx = getLeft() + (getWidth() >> 1) - adjustx;
			int ty = getTop() - adjusty;

			if (topIndex != 0) {
				Theme.drawArrow(g, Theme.Arrow, tx - 3, ty + 2, Theme.UP);
			}

			if (topIndex != items.length - maxItem) {
				ty += getHeight();
				Theme.drawArrow(g, Theme.Arrow, tx - 3, ty - 6, Theme.DOWN);
			}
		} else {
			for (int i = 0; i < items.length; i++) {
				paintItem(g, i, adjustx, adjusty);
			}
		}
	}

	private void paintItem(Graphics g, int itemindex, int adjustx, int adjusty) {
		String suffix = "";

		suffix = getShortcutChar(itemindex) + ".";

		int left = getLeft() - adjustx;
		int top = getTop() + itemHeight * (itemindex - topIndex) - adjusty;
		String title = getMenuTitle(items[itemindex]);
		g.setFont(getFont());
		if (itemindex == currentIndex) {
			Theme.drawSelectedBackground(g, left + 1, top + 1, getWidth() - 2, itemHeight - 2);
			if (items[itemindex].isEnable()) {
				g.setColor(Theme.TextLight);
			} else {
				g.setColor(Theme.ComponentLight);
			}
			g.drawString(suffix, left + 3, top + itemspace / 2, ANCHOR);
			g.drawString(title, left + 3 + Settings.MENUSIDEBARWIDTH, top + itemspace / 2, ANCHOR);
		} else {
			if (items[itemindex].isEnable()) {
				g.setColor(Theme.TextColor);
			} else {
				g.setColor(Theme.DisabledColor);
			}
			g.drawString(suffix, left + 3, top + itemspace / 2, ANCHOR);
			g.drawString(title, left + 3 + Settings.MENUSIDEBARWIDTH, top + itemspace / 2, ANCHOR);
		}

		int hcenter = itemHeight >> 1;
		if (hasSubMenu(items[itemindex])) {
			Theme.drawArrow(g, Theme.Arrow, left + getWidth() - 7, top + hcenter - 3, Theme.RIGHT);
		}
	}

	public void setMenus(MenuItem[] items) {
		this.items = items;
	}

	/**
	 * 计算当前菜单合适的高与宽
	 */
	public void validate() {
		//System.out.println("popmenu.validate()");
		itemHeight = getFont().getHeight() + itemspace;
		MainCanvas canvas = MainCanvas.getInstance();
		//		System.out.println("currentMenus = " + currentMenus.length);
		int menuWidth = getMaxMenuWidth();
		int menuHeight = itemHeight * items.length;

		if (menuHeight > canvas.getHeight() - 20) {
			maxItem = ((canvas.getHeight() - 30) / itemHeight);//10是预留给上下滚动箭头的绘制空间高度;上下各3个像素
			menuHeight = itemHeight * maxItem + 10;
		} else {
			maxItem = items.length;
		}

		menuWidth = menuWidth < 60 ? 60 : menuWidth;
		setWidth(menuWidth);
		setHeight(menuHeight);
		currentIndex = 0;
		topIndex = 0;

		//System.out.println(getLeft() + ", " + getTop());
	}

	public boolean keyRepeated(int keyCode) {
		return keyReleased(keyCode);
	}

	public boolean keyReleased(int keyCode) {
		if (keyCode == Settings.VKEY_RSOFT) {
			MainCanvas.getInstance().closePopup();
			return false;
		}

		int index = -1;
		//System.out.println("keyCode = " + keyCode);
		if (keyCode == Settings.VKEY_POUND) { //#
			index = 11;
		} else if (keyCode == Settings.VKEY_STAR) { //*
			index = 10;
		} else if (keyCode == Settings.VKEY_NUM1) { //1
			index = 1;
		} else if (keyCode == Settings.VKEY_NUM2) { //2
			index = 2;
		} else if (keyCode == Settings.VKEY_NUM3) { //3
			index = 3;
		} else if (keyCode == Settings.VKEY_NUM4) { //4
			index = 4;
		} else if (keyCode == Settings.VKEY_NUM5) { //5
			index = 5;
		} else if (keyCode == Settings.VKEY_NUM6) { //6
			index = 6;
		} else if (keyCode == Settings.VKEY_NUM7) { //7
			index = 7;
		} else if (keyCode == Settings.VKEY_NUM8) { //8
			index = 8;
		} else if (keyCode == Settings.VKEY_NUM9) { //9
			index = 9;
		}

		if (index == -1 || index > items.length) {

		} else {
			currentIndex = index - 1;
			if (items[currentIndex].isEnable()) {
				if (hasSubMenu(items[currentIndex])) {
					openPop(Settings.ANIMATE_NONE);
				} else {
					execute(currentIndex);
				}
			}
			return false;
		}

		keyCode = Settings.mapKey(keyCode);

		if (keyCode == Settings.VKEY_UP) {
			currentIndex--;
			if (currentIndex < 0) {
				currentIndex = items.length - 1;
				topIndex = items.length - maxItem;
			}
			if (currentIndex < topIndex) {
				topIndex = currentIndex;
			}
		} else if (keyCode == Settings.VKEY_DOWN) {
			currentIndex++;
			if (currentIndex > items.length - 1) {
				currentIndex = topIndex = 0;
			}
			if (currentIndex > topIndex + maxItem - 1) {
				topIndex = currentIndex - maxItem + 1;
			}
		} else if (keyCode == Settings.VKEY_LEFT) {
			MainCanvas.getInstance().closePopup();
		} else if (keyCode == Settings.VKEY_RIGHT) {
			if (hasSubMenu(items[currentIndex]) && items[currentIndex].isEnable()) {
				openPop(Settings.ANIMATE_RIGHT);
			}
		} else if (keyCode == Settings.VKEY_FIRE) {
			if (hasSubMenu(items[currentIndex])) {
				openPop(Settings.ANIMATE_RIGHT);
			} else {
				execute(currentIndex);
			}
		} else if (keyCode == Settings.VKEY_LSOFT) {
			if (hasSubMenu(items[currentIndex])) {
				openPop(Settings.ANIMATE_RIGHT);
			} else {
				execute(currentIndex);
			}
		} else if (keyCode == Settings.VKEY_RSOFT) {
			MainCanvas.getInstance().closePopup();
		} else if (keyCode == Settings.VKEY_NUM0) {
			MainCanvas.getInstance().closePopup();
		} else if (keyCode == Settings.VKEY_NUM2) {
			currentIndex--;
			if (currentIndex < 0) {
				currentIndex = items.length - 1;
				topIndex = items.length - maxItem;
			}
			if (currentIndex < topIndex) {
				topIndex = currentIndex;
			}
		} else if (keyCode == Settings.VKEY_NUM4) {
			MainCanvas.getInstance().closePopup();
		} else if (keyCode == Settings.VKEY_NUM6) {
			if (hasSubMenu(items[currentIndex])) {
				openPop(Settings.ANIMATE_RIGHT);
			}
		} else if (keyCode == Settings.VKEY_NUM8) {
			currentIndex++;
			if (currentIndex > items.length - 1) {
				currentIndex = topIndex = 0;
			}
			if (currentIndex > topIndex + maxItem - 1) {
				topIndex = currentIndex - maxItem + 1;
			}
		} else if (keyCode == Settings.VKEY_NUM5) {
			if (hasSubMenu(items[currentIndex])) {
				openPop(Settings.ANIMATE_RIGHT);
			} else {

				execute(currentIndex);
			}
		}
		//repaint();
		return true;
	}

	//弹出菜单
	private void openPop(int method) {
		MainCanvas mainCanvas = MainCanvas.getInstance();
		MenuItem[] items = this.items[currentIndex].getSubItems();
		PopMenu menu = new PopMenu(callbackPop, items);
		menu.validate();
		int x, y;

		x = getLeft() + getWidth() - 10;
		if (x + menu.getWidth() > mainCanvas.getWidth()) {
			x = mainCanvas.getWidth() - menu.getWidth();
		}

		y = mainCanvas.getHeight() - menu.getHeight() - 20;
		if (y > getTop() + itemHeight * currentIndex) {
			y = getTop();
		}
		menu.setLocation(x, y);
		mainCanvas.showPopup(menu, method);
	}

	private void execute(int index) {
		if (null != callbackPop && items[index].isEnable()) {
			mainCanvas.closePopMenu();
			callbackPop.callback(this, new Command(items[index].getText(), Command.OK, 1), new Object[] { items[index]
					.getObj() });
		}
	}

	public boolean pointerPressed(int x, int y) {
		//		System.out.println(x + ", " + y);
		//		System.out.println("rect: " + getLeft() + ", " + getTop() + ", " + getWidth() + ", "
		//				+ getHeight());
		if (x > getLeft() && x < getLeft() + getWidth() && y > getTop() && y < getTop() + getHeight()) {
			currentIndex = (y - getTop()) / itemHeight + topIndex;
			//System.out.println(currentIndex);
		}
		lastPointerX = x;
		lastPointerY = y;
		return true;
		/*if (items[currentIndex].isEnable()) {
		 if (hasSubMenu(items[currentIndex])) {
		 openPop(Settings.ANIMATE_NONE);
		 } else {
		 execute(currentIndex);
		 }
		 } */
	}

	public boolean pointerReleased(int x, int y) {
		if (lastPointerX > getLeft() && lastPointerX < getLeft() + getWidth() && lastPointerY > getTop()
				&& lastPointerY < getTop() + getHeight()) { //上次在菜单中
			if (x > getLeft() && x < getLeft() + getWidth() && y > getTop() && y < getTop() + getHeight()) {
				int index = (y - getTop()) / itemHeight + topIndex;
				if (index == currentIndex) { //在同一item上按下和释放
					if (items[currentIndex].isEnable()) {
						if (hasSubMenu(items[currentIndex])) {
							openPop(Settings.ANIMATE_NONE);
						} else {
							execute(currentIndex);
						}
					}
				}
				return false;
			} else { //菜单之外，不处理
				return false;
			}
		} else { //上次不在菜单中
			if (x > getLeft() && x < getLeft() + getWidth() && y > getTop() && y < getTop() + getHeight()) {
				currentIndex = (y - getTop()) / itemHeight + topIndex;
				return true;
			} else {
				mainCanvas.closePopup();
				return false;
			}
		}
	}

}