javax.microedition.lcdui.Item Maven / Gradle / Ivy
/*
* MicroEmulator
* Copyright (C) 2001 Bartek Teodorczyk
* Copyright (C) 2005 Andres Navarro
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contributor(s):
* 3GLab
*/
package javax.microedition.lcdui;
import java.util.Vector;
import org.microemu.device.DeviceFactory;
public abstract class Item
{
static final int OUTOFITEM = Integer.MAX_VALUE;
public static final int LAYOUT_DEFAULT = 0x0000;
public static final int LAYOUT_LEFT = 0x0001;
public static final int LAYOUT_RIGHT = 0x0002;
public static final int LAYOUT_CENTER = 0x0003;
public static final int LAYOUT_TOP = 0x0010;
public static final int LAYOUT_BOTTOM = 0x0020;
public static final int LAYOUT_VCENTER = 0x0030;
public static final int LAYOUT_NEWLINE_BEFORE = 0x0100;
public static final int LAYOUT_NEWLINE_AFTER = 0x0200;
public static final int LAYOUT_SHRINK = 0x0400;
public static final int LAYOUT_EXPAND = 0x0800;
public static final int LAYOUT_VSHRINK = 0x1000;
public static final int LAYOUT_VEXPAND = 0x2000;
public static final int LAYOUT_2 = 0x4000;
public static final int PLAIN = 0;
public static final int HYPERLINK = 1;
public static final int BUTTON = 2;
StringComponent labelComponent;
Screen owner = null;
private boolean focus = false;
// MIDP2
int layout;
Vector commands;
Command defaultCommand;
ItemCommandListener commandListener;
// -1 means unlocked, otherwise it is the
// application requested preffered size
// for the actual one use the getPrefXXXX() method
// package access
private int prefWidth, prefHeight;
Item(String label)
{
labelComponent = new StringComponent(label);
commands = new Vector();
}
public void addCommand(Command cmd) {
if (cmd == null)
throw new NullPointerException();
if (!commands.contains(cmd)) {
// Now insert it in order
boolean inserted = false;
for (int i = 0; i < commands.size(); i++) {
if (cmd.getPriority() < ((Command)commands.elementAt(i)).getPriority()) {
commands.insertElementAt(cmd, i);
inserted = true;
break;
}
}
if (!inserted) {
// Not inserted just place it at the end
commands.addElement(cmd);
}
repaintOwner();
}
}
public String getLabel()
{
return labelComponent.getText();
}
public int getLayout() {
return layout;
}
public int getMinimumHeight() {
if (labelComponent != null)
return labelComponent.getHeight();
else
return 0;
}
public int getMinimumWidth() {
return getMaximumWidth();
}
public int getPreferredHeight() {
int ret = prefHeight;
int min = getMinimumHeight();
int max = getMaximumHeight();
if (ret == -1)
return min;
if (ret < min)
ret = min;
else if (ret > max)
ret = max;
return ret;
}
public int getPreferredWidth() {
int ret = prefWidth;
int min = getMinimumWidth();
int max = getMaximumWidth();
if (ret == -1)
return max;
if (ret < min)
ret = min;
else if (ret > max)
ret = max;
return ret;
}
public void notifyStateChanged() {
Screen owner = getOwner();
if (owner != null && owner instanceof Form) {
Form form = (Form) owner;
form.fireItemStateListener(this);
}
}
public void removeCommand(Command cmd) {
commands.removeElement(cmd);
if (defaultCommand == cmd)
defaultCommand = null;
repaintOwner();
}
public void setDefaultCommand(Command cmd) {
this.defaultCommand = cmd;
if (cmd != null) {
// we should repaint even if the command was added
// because the command layout could become different
if (commands.contains(cmd))
addCommand(cmd);
else
repaintOwner();
} else {
repaintOwner();
}
}
public void setItemCommandListener(ItemCommandListener l) {
this.commandListener = l;
}
public void setLabel(String label)
{
labelComponent.setText(label);
repaint();
}
public void setLayout(int layout) {
// TODO validate container is not Alert
// on add to Alert validate this is default
// notice that the vertical and the horizontal
// layout policies can't generate conflict
// because the center is the or of the two
// others (ie VCENTER == (LEFT | RIGHT))
if ((( (layout & LAYOUT_SHRINK) != 0) &&
((layout & LAYOUT_EXPAND) != 0)) ||
( ((layout & LAYOUT_VSHRINK) != 0) &&
(layout & LAYOUT_VEXPAND) != 0) )
throw new IllegalArgumentException(
"Bad combination of layout policies");
this.layout = layout;
repaint();
}
public void setPreferredSize(int width, int height) {
if (width < -1 || height < -1) {
throw new IllegalArgumentException();
}
this.prefWidth = width;
this.prefHeight = height;
repaint();
}
//
// package access methods
//
// repaint the owner of this item (if any)
void repaintOwner() {
Screen owner = getOwner();
if (owner != null)
owner.repaint();
}
int getHeight()
{
return labelComponent.getHeight();
}
boolean isFocusable()
{
return false;
}
void keyPressed(int keyCode)
{
}
abstract int paint(Graphics g);
void paintContent(Graphics g)
{
labelComponent.paint(g);
}
void repaint()
{
if (owner != null) {
owner.repaint();
}
}
boolean hasFocus()
{
return focus;
}
void setFocus(boolean state)
{
focus = state;
}
Screen getOwner()
{
return owner;
}
void setOwner(Screen owner)
{
this.owner = owner;
}
boolean select()
{
// call the default command (if there is one)
// however subclasses may override this behaviour
// (ie popup choices uses select to bring the popup)
if (defaultCommand != null && commandListener != null) {
commandListener.commandAction(defaultCommand, this);
return true;
} else {
return false;
}
}
int traverse(int gameKeyCode, int top, int bottom, boolean action)
{
return 0;
}
int getMaximumHeight() {
if (owner != null) {
return owner.getHeight() * 10;
} else {
return DeviceFactory.getDevice().getDeviceDisplay().getHeight() * 10;
}
}
int getMaximumWidth() {
if (owner != null) {
return owner.getWidth() - 3;
} else {
return DeviceFactory.getDevice().getDeviceDisplay().getWidth() - 3;
}
}
ItemCommandListener getItemCommandListener() {
return this.commandListener;
}
}