Blackberry custom OVERLAY horizontal menu
- by Dachmt
Thanks to Max in this post, I made an horizontal menu. But now I'm trying to make an overlay menu, i I don't find how to do that... Let's see what i got first.
So, I have a class MapScreen which display my map:
public class MapScreen extends MenuScreen
Then, I have in the same file the MenuScreen class like this that allows to display the horizontal menu when I press the MENU key:
abstract class MenuScreen extends MainScreen {
boolean mMenuEnabled = false;
CyclicHFManager mMenuManager = null;
public MenuScreen() {
mMenuManager = new CyclicHFManager();
mMenuManager.setBorder(BorderFactory.createBevelBorder(new XYEdges(4,
0, 0, 0), new XYEdges(Color.DARKBLUE, 0, 0, 0), new XYEdges(
Color.WHITE, 0, 0, 0)));
mMenuManager.setBackground(BackgroundFactory
.createLinearGradientBackground(Color.DARKBLUE, Color.DARKBLUE,
Color.LIGHTBLUE, Color.LIGHTBLUE));
for (int i = 0; i < 10; i++) {
Bitmap nBitmap = new Bitmap(60, 60);
Graphics g = new Graphics(nBitmap);
g.setColor(Color.DARKBLUE);
g.fillRect(0, 0, 60, 60);
g.setColor(Color.WHITE);
g.drawRect(0, 0, 60, 60);
Font f = g.getFont().derive(Font.BOLD, 40);
g.setFont(f);
String text = String.valueOf(i);
g.drawText(text, (60 - f.getAdvance(text)) >> 1, (60 - f
.getHeight()) >> 1);
Bitmap fBitmap = new Bitmap(60, 60);
g = new Graphics(fBitmap);
g.setColor(Color.DARKBLUE);
g.fillRect(0, 0, 60, 60);
g.setColor(Color.GOLD);
g.drawRect(0, 0, 60, 60);
g.setFont(f);
g.drawText(text, (60 - f.getAdvance(text)) >> 1, (60 - f
.getHeight()) >> 1);
BitmapButtonField button = new BitmapButtonField(nBitmap, fBitmap);
button.setCookie(String.valueOf(i));
button.setPadding(new XYEdges(0, 18, 0, 18));
button.setChangeListener(new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
Dialog.inform("Button # " + (String) field.getCookie());
}
});
mMenuManager.add(button);
}
}
protected boolean keyDown(int keycode, int time) {
if (Keypad.KEY_MENU == Keypad.key(keycode)) {
if (mMenuManager.getManager() != null) {
delete(mMenuManager);
mMenuManager.mCyclicTurnedOn = false;
} else {
add(mMenuManager);
mMenuManager.getField(2).setFocus();
mMenuManager.mCyclicTurnedOn = true;
}
return true;
} else {
return super.keyDown(keycode, time);
}
}}
And finally my menu manager:
public class CyclicHFManager extends HorizontalFieldManager {
int mFocusedFieldIndex = 0;
public boolean mCyclicTurnedOn = false;
public void focusChangeNotify(int arg0) {
super.focusChangeNotify(arg0);
if (mCyclicTurnedOn) {
int focusedFieldIndexNew = getFieldWithFocusIndex();
if (focusedFieldIndexNew != mFocusedFieldIndex) {
if (focusedFieldIndexNew - mFocusedFieldIndex > 0)
switchField(0, getFieldCount() - 1);
else
switchField(getFieldCount() - 1, 0);
}
} else {
mFocusedFieldIndex = getFieldWithFocusIndex();
}
}
private void switchField(int prevIndex, int newIndex) {
Field field = getField(prevIndex);
delete(field);
insert(field, newIndex);
}}
So as it is like this, it is working: when I press the MENU key, the menu appears, i can navigate between buttons, and it disappear when I press again the same key. The only problem is my menu isn't overlaying my map, it pushes the content up. I tried with the menu manager like in your first response, resizing the content manager but it is the same result.
Max gave me the link http://stackoverflow.com/questions/1497073/blackberry-fields-layout-animation to do so, but I really don't know how to use it to make it work in my project...
Thank you for your help!
UPDATE
This works great, it's what I wanted. However, I still have a problem because I'm under 4.5. So first in the MenuHostManager constructor, I deleted the
USE_ALL_HEIGHT
and change
setPositionChild(mMenuManager, 0,
Display.getHeight() - mMenuManager.getPreferredHeight());
like this to have the menu at the bottom of the screen. It worked.
Then, instead of drawing my bitmaps, I did this:
Bitmap nBitmap = EncodedImage.getEncodedImageResource("menu" +
i + ".png").getBitmap();
BitmapButtonField button = new BitmapButtonField(nBitmap, nBitmap);
And it worked too (no rollover for now, later). So it is great!
I also overwrite the Paint method of my CyclicHFManager to have a background color, because I can't use the BorderFactory and BackgroundFactory... My menu bar has a color for now so it's ok.
Then, because of these 2 classes missing, in my BitmapButtonField I had to delete the 2 setBorder functions that change the borders. And now i have my buttons pretty big like normal buttons with borders...
How can I make the same effect as the setBorder functions under 4.5? (BTW, setBorder is not working under 4.5 too...).
Thank you!
