user interface - Blackberry Click Events -
i have imagebutton in verticalfieldmanager , vfm in horizontalfieldmanager. imagebutton click event firing when click anywhere in surrounding field. want click event fire when clicking imagebutton, not field (vfm or hfm).
following code:
imagebutton login = new imagebutton(configmodel.getloginbutton(), focusable|field.field_right, "login.png", "plogin.png",0x9cbe95); horizontalfieldmanager hfm = new horizontalfieldmanager(use_all_width); verticalfieldmanager loginbuttonvfm = new verticalfieldmanager(use_all_width); loginbuttonvfm.add(login); hfm.add(loginbuttonvfm); add(hfm); fieldchangelistener loginlistener = new fieldchangelistener() { public void fieldchanged(field field, int context) { dialog.alert("fired"); } } login.setchangelistener(loginlistener); imagebutton class code here:
public class imagebutton extends field{ //image button class private string _label; private int _labelheight; private int _labelwidth; private font _font; private bitmap _currentpicture; private bitmap _onpicture; private bitmap _offpicture; int color; public imagebutton(string text, long style ,string img, string img_hvr, int color){ super(style); _offpicture = bitmap.getbitmapresource(img); _onpicture = bitmap.getbitmapresource(img_hvr); _font = font.getdefault().derive(font.bold, 7, ui.units_pt); _label = text; _labelheight = _onpicture.getheight(); _labelwidth = _onpicture.getwidth(); this.color = color; _currentpicture = _offpicture; } public void setimage(string img){ _offpicture = bitmap.getbitmapresource(img); _currentpicture = _offpicture; } /** * @return text on button */ public void settext(string text){ _label = text; } string gettext(){ return _label; } /** * field implementation. * @see net.rim.device.api.ui.field#getpreferredheight() */ public int getpreferredheight(){ return _labelheight; } /** * field implementation. * @see net.rim.device.api.ui.field#getpreferredwidth() */ public int getpreferredwidth(){ return _labelwidth; } /** * field implementation. changes picture when focus gained. * @see net.rim.device.api.ui.field#onfocus(int) */ protected void onfocus(int direction) { _currentpicture = _onpicture; // invalidate(); super.onfocus(direction); } /** * field implementation. changes picture when focus lost. * @see net.rim.device.api.ui.field#onunfocus() */ protected void onunfocus() { _currentpicture = _offpicture; invalidate(); super.onunfocus(); } /** * field implementation. * @see net.rim.device.api.ui.field#drawfocus(graphics, boolean) */ // protected void drawfocus(graphics graphics, boolean on) { // // nothing // } protected void drawfocus(graphics graphics, boolean on) { if (on) { //draw own custom focus. } } /** * field implementation. * @see net.rim.device.api.ui.field#layout(int, int) */ protected void layout(int width, int height) { setextent(math.min( width, getpreferredwidth()), math.min( height, getpreferredheight())); } /** * field implementation. * @see net.rim.device.api.ui.field#paint(graphics) */ protected void paint(graphics graphics){ // first draw background colour , picture graphics.setcolor(this.color); graphics.fillrect(0, 0, getwidth(), getheight()); graphics.drawbitmap(0, 0, getwidth(), getheight(), _currentpicture, 0, 0); // draw text graphics.setcolor(color.white); graphics.setfont(_font); graphics.setfont(graphics.getfont().derive(font.bold)); graphics.drawtext(_label, 5,9, (int)( getstyle() & drawstyle.ellipsis | drawstyle.valign_mask | drawstyle.halign_mask), getwidth() - 6 ); } /** * overridden event dispatch thread can catch event * instead of having caught here.. * @see net.rim.device.api.ui.field#navigationclick(int, int) */ protected boolean navigationclick(int status, int time){ fieldchangenotify(1); return true; } }
this kind of thing pretty easy find bugs in, when try write custom fields yourself. (it's not fault ... blackberry java makes stuff more difficult should be!)
i think easiest way solve problem reuse else has tested. recommend looking @ blackberry advanced ui library, in particular, these 2 classes:
as think need. believe important code need change, or add imagebutton class this:
protected boolean keychar( char character, int status, int time ) { if( character == characters.enter ) { clickbutton(); return true; } return super.keychar( character, status, time ); } protected boolean navigationclick( int status, int time ) { if (status != 0) clickbutton(); return true; } protected boolean trackwheelclick( int status, int time ) { if (status != 0) clickbutton(); return true; } protected boolean invokeaction( int action ) { switch( action ) { case action_invoke: { clickbutton(); return true; } } return super.invokeaction( action ); } protected boolean touchevent( touchevent message ) { int x = message.getx( 1 ); int y = message.gety( 1 ); if( x < 0 || y < 0 || x > getextent().width || y > getextent().height ) { // outside field return false; } switch( message.getevent() ) { case touchevent.unclick: clickbutton(); return true; } return super.touchevent( message ); } /** * public way click button */ public void clickbutton() { fieldchangenotify( 0 ); } you able use fieldchangelistener now, image button not call unless click occurs on button.
if want, can change code above use
fieldchangenotify( 1 ); if 1 meaningful context value you. important thing add other methods, , change navigationclick().
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