javax.microedition.lcdui.Screen Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of microemulator Show documentation
Show all versions of microemulator Show documentation
MicroEmulator one jar assembly for distribution.
The newest version!
/*
* MicroEmulator
* Copyright (C) 2001 Bartek Teodorczyk
*
* It is licensed under the following two licenses as alternatives:
* 1. GNU Lesser General Public License (the "LGPL") version 2.1 or any newer version
* 2. Apache License (the "AL") Version 2.0
*
* You may not use this file except in compliance with at least one of
* the above two licenses.
*
* You may obtain a copy of the LGPL at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*
* You may obtain a copy of the AL at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the LGPL or the AL for the specific language governing permissions and
* limitations.
*/
package javax.microedition.lcdui;
// TODO implement pointer events
public abstract class Screen extends Displayable
{
Screen(String title)
{
super(title);
}
void scroll(int gameKeyCode) {
viewPortY += traverse(gameKeyCode, viewPortY, viewPortY + viewPortHeight);
repaint();
}
abstract int traverse(int gameKeyCode, int top, int bottom);
void keyPressed(int keyCode)
{
int gameKeyCode = Display.getGameAction(keyCode);
if (gameKeyCode == Canvas.UP || gameKeyCode == Canvas.DOWN) {
viewPortY += traverse(gameKeyCode, viewPortY, viewPortY + viewPortHeight);
repaint();
}
}
void hideNotify()
{
super.hideNotify();
}
void keyRepeated(int keyCode)
{
keyPressed(keyCode);
}
final void paint(Graphics g)
{
int contentHeight = 0;
int translatedY;
if (viewPortY == 0) {
currentDisplay.setScrollUp(false);
} else {
currentDisplay.setScrollUp(true);
}
g.setGrayScale(255);
g.fillRect(0, 0, getWidth(), getHeight());
g.setGrayScale(0);
// TODO move to Displayable
if (getTicker() != null) {
contentHeight += getTicker().paintContent(g);
}
g.translate(0, contentHeight);
translatedY = contentHeight;
// TODO move to Displayable
// TODO remove this StringComponent object when native UI is completed
StringComponent title = new StringComponent(getTitle());
contentHeight += title.paint(g);
g.drawLine(0, title.getHeight(), getWidth(), title.getHeight());
contentHeight += 1;
g.translate(0, contentHeight - translatedY);
translatedY = contentHeight;
g.setClip(0, 0, getWidth(), getHeight() - contentHeight);
g.translate(0, -viewPortY);
contentHeight += paintContent(g);
g.translate(0, viewPortY);
if (contentHeight - viewPortY > getHeight()) {
currentDisplay.setScrollDown(true);
} else {
currentDisplay.setScrollDown(false);
}
g.translate(0, -translatedY);
}
abstract int paintContent(Graphics g);
void repaint()
{
super.repaint();
}
void showNotify()
{
viewPortY = 0;
super.showNotify();
}
}