}
for(int i=0; i
graphics.drawString(info_wrap1[i],5, i * ft.getHeight()+head.menuHeight+margin, Graphics.TOP|Graphics.LEFT);
}
4 坐标变换
[html] graphics.clipRect(0, head.menuHeight+margin, width, bodyHeight);
graphics.translate(0, dir*currentPageIndex*bodyHeight);
graphics.clipRect(0, head.menuHeight+margin, width, bodyHeight);
graphics.translate(0, dir*currentPageIndex*bodyHeight);
文本绘制完成后，将坐标变换回来。
[html] graphics.translate(0, -dir*currentPageIndex*bodyHeight);
graphics.translate(0, -dir*currentPageIndex*bodyHeight);
5 绘制滚动条
[html] private void drawScrollBar()
{
int barHeight = height-head.menuHeight-menu.menuHeight;
graphics.setColor(Color.menuFrame);
graphics.fillRect(width-3, head.menuHeight, 2, barHeight);
graphics.setColor(Color.selectBg);
graphics.fillRect(width-4, head.menuHeight+(currentPageIndex)*barHeight/page, 4, barHeight/page);
}
private void drawScrollBar()
{
int barHeight = height-head.menuHeight-menu.menuHeight;
graphics.setColor(Color.menuFrame);
graphics.fillRect(width-3, head.menuHeight, 2, barHeight);
graphics.setColor(Color.selectBg);
graphics.fillRect(width-4, head.menuHeight+(currentPageIndex)*barHeight/page, 4, barHeight/page);
}
6 事件处理
当检测到按键事件后，进行翻页操作。
[html] protected void keyPressed(int keyCode)
{
//System.out.println(keycode);
switch(keyCode)
{
case KeyID.SOFT_RIGHT:
{
String flag = "0";
Object [] args = {flag,""};
controller.handleEvent(UIController.EventID.EVENT_MAIN_SCREEN,args);
break;
}
default:
;
}
keyCode = getGameAction(keyCode);
//System.out.println(page);
switch(keyCode)
{
case UP:
{
dir = -1;
if(currentPageIndex>0)
{
currentPageIndex--;
}
else
{
//dir = 0;
}
show();
break;
}
case DOWN:
{
dir = -1;
if(currentPageIndex
currentPageIndex++;
}
else
{
//dir = 0;
}
show();
break;
}
}
}
protected void keyPressed(int keyCode)
{
//System.out.println(keycode);
switch(keyCode)
{
case KeyID.SOFT_RIGHT:
{
String flag = "0";
Object [] args = {flag,""};
controller.handleEvent(UIController.EventID.EVENT_MAIN_SCREEN,args);
break;
}
default:
;
}
keyCode = getGameAction(keyCode);
//System.out.println(page);
switch(keyCode)
{
case UP:
{
dir = -1;
if(currentPageIndex>0)
{
currentPageIndex--;
}
else
{
//dir = 0;
}
show();
break;
}
case DOWN:
{
dir = -1;
if(currentPageIndex
currentPageIndex++;
}
else
{
//dir = 0;
}
show();
break;
}
}
}
本例方法能自适应的检测屏幕的宽度和长度，依据字体的大小，对文本进行分页，滚动显示，实现效果如图1所示：
图1 滚动显示效果
摘自 tandesir的专栏