Home » Eclipse Projects » Remote Application Platform (RAP) » Execute command Phase Listener for KeyBindings(how to execute a command via key sequences in RAP)
| Execute command Phase Listener for KeyBindings [message #519563] |
Tue, 09 March 2010 10:39  |
 Thomas Jodes
Messages: 15
Registered: July 2009 |
Junior Member |
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Hi rap community,
I'd like to implement a mechanism that allows to execute a Command via a key sequence.
The following skeleton code base i have to implement this:
* Hook in "preStartup()" of a WorkbenchAdvisor to send initial jsCode for key events:
public void preStartup() {
final Display display = Display.getCurrent();
RWT.getLifeCycle().addPhaseListener( new PhaseListener() {
public void afterPhase( final PhaseEvent event ) {
if( Display.getCurrent() == display ) {
String jsCode = "var doc = qx.ui.core.ClientDocument.getInstance();\n"
+ "doc.addEventListener( \"keypress\", function( evt ) {\n"
+ " var req = org.eclipse.swt.Request.getInstance();\n"
+ " req.addParameter( \"myCommandParameter\", evt.getKeyIdentifier() );\n"
+ " req.send();\n" + "} );\n";
IServiceStateInfo stateInfo = ContextProvider.getStateInfo();
HtmlResponseWriter writer = stateInfo.getResponseWriter();
writer.append( jsCode );
RWT.getLifeCycle().removePhaseListener( this ); // only initial, remove yourself
}
}
public PhaseId getPhaseId() {
return PhaseId.RENDER;
}
});
executeCommandListener = new ExecuteCommandPhaseListener(
"your.compandy.myCommand", "myCommandParameter" );
RWT.getLifeCycle().addPhaseListener( executeCommandListener );
}
* Register an "ExecuteCommandPhaseListener", that reads the input keys send with org.eclipse.swt.Request (last lines above) and triggers the command using IHandlerService#executeCommand(java.langString)
---
- The Problem I face here, how can I react on meaningful key sequences? I.e. "CRTL+Q" or "CRTL+1"; with the proposal above I can only react on a single key press. Further more pressing CTRL, then "1" fires 'Control' only (with evt.getKeyIdentifier(), see above).
- Is there any possiblity to implement any meaningful keypress sequences like "CRTL+1" ?
Any help or hint is greatly appreciated, Thanks
Thomas
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| Re: Execute command Phase Listener for KeyBindings [message #519570 is a reply to message #519563] |
Tue, 09 March 2010 10:58  |
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Hi Thomas,
you can filter certain key sequences by adding code like the following
to your Javascript event listener:
if( evt.isCtrlPressed && evt.getKeyIdentifier() == "1" ) {
var req = ...
For the KeyEvent API, see [1].
Hope this helps,
Ralf
[1] http://demo.qooxdoo.org/0.7.4/apiviewer/#qx.event.type.KeyEv ent
evt.getKeyIdentifier()
Thomas Jodes wrote:
> Hi rap community,
>
> I'd like to implement a mechanism that allows to execute a Command via a
> key sequence.
>
> The following skeleton code base i have to implement this:
>
> * Hook in "preStartup()" of a WorkbenchAdvisor to send initial jsCode
> for key events:
>
>
> public void preStartup() {
> final Display display = Display.getCurrent();
> RWT.getLifeCycle().addPhaseListener( new PhaseListener() {
>
> public void afterPhase( final PhaseEvent event ) {
> if( Display.getCurrent() == display ) {
> String jsCode = "var doc =
> qx.ui.core.ClientDocument.getInstance();\n"
> + "doc.addEventListener( \"keypress\",
> function( evt ) {\n"
> + " var req =
> org.eclipse.swt.Request.getInstance();\n"
> + " req.addParameter(
> \"myCommandParameter\", evt.getKeyIdentifier() );\n"
> + " req.send();\n" + "} );\n";
> IServiceStateInfo stateInfo =
> ContextProvider.getStateInfo();
> HtmlResponseWriter writer =
> stateInfo.getResponseWriter();
> writer.append( jsCode );
> RWT.getLifeCycle().removePhaseListener( this ); //
> only initial, remove yourself
> }
> }
>
> public PhaseId getPhaseId() {
> return PhaseId.RENDER;
> }
> });
> executeCommandListener = new ExecuteCommandPhaseListener(
> "your.compandy.myCommand", "myCommandParameter" );
> RWT.getLifeCycle().addPhaseListener( executeCommandListener );
> }
>
>
> * Register an "ExecuteCommandPhaseListener", that reads the input keys
> send with org.eclipse.swt.Request (last lines above) and triggers the
> command using IHandlerService#executeCommand(java.langString)
>
> ---
>
> - The Problem I face here, how can I react on meaningful key sequences?
> I.e. "CRTL+Q" or "CRTL+1"; with the proposal above I can only react on a
> single key press. Further more pressing CTRL, then "1" fires 'Control'
> only (with evt.getKeyIdentifier(), see above).
>
> - Is there any possiblity to implement any meaningful keypress sequences
> like "CRTL+1" ?
>
> Any help or hint is greatly appreciated, Thanks
>
> Thomas
>
>
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| Re: Execute command Phase Listener for KeyBindings [message #519604 is a reply to message #519563] |
Tue, 09 March 2010 12:45 |
Thomas Jodes
Messages: 15
Registered: July 2009 |
Junior Member |
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Ups, sorry to write back; one fallback Ralf:
evt.isCtrlPressed() && evt.getKeyIdentifier() == "1"
is not usable because evt is already fired solely from the ctrl key...
even if crtl is pressed, holded and then "1" pressed, the press for "1" is ignored ...
---
*edit*: It's a typical mshtml story:
- In gecko, everything works fine: the combination of CTRL plus 1 results in evt.isCtrlPressed() == true and evt.getKeyIdentifier() == "1".
- In mshtml, any additional key is ignored, as far as the user presses CTRL. Thus, we have evt.isCtrlPressed == true and evt.getKeyIdentifer() == 'Control'
That is, you cannot react on key combinations, i.e. CTRL+1 of mshtml
[Updated on: Tue, 09 March 2010 13:15] Report message to a moderator |
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| Re: Execute command Phase Listener for KeyBindings [message #519625 is a reply to message #519604] |
Tue, 09 March 2010 14:20 |
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Thomas,
this works as expected for me. Sure you added the listener to
"keypress", not "keydown" or "keyup"?
If you have Firebug installed (which you should when you're coding
Javascript), you can paste the following code into your Firebug console
on a qooxdoo site (you can try it on the qooxdoo 0.7.4 API site):
var doc = qx.ui.core.ClientDocument.getInstance();
doc.addEventListener( "keypress", function( evt ) { console.log( evt )
} );
Focus some widget inside the browser window (to get the focus out of
Firebug) and hit some key combinations. You will see that the event is
only being fired when hitting Ctrl AND another key.
Good luck, Ralf
Thomas Jodes wrote:
> Ups, sorry to write back; one fallback Ralf:
>
> evt.isCtrlPressed() && evt.getKeyIdentifier() == "1"
>
> is not usable because evt is already fired solely from the ctrl key...
> even if crtl is pressed, holded and then "1" pressed, the press for "1"
> is ignored ...
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| Re: Execute command Phase Listener for KeyBindings [message #519746 is a reply to message #519638] |
Tue, 09 March 2010 20:00 |
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Hi Thomas,
I can confirm the problem you describe. I'm currently not sure whether
this is a bug in qooxdoo or a problem with RAP. It even seems to differ
between IE7 and IE8. As far as I can see, the KeyListeners are not
affected by this issue, so it's not directly a bug. We're going to look
into this anyway, but won't have the time to do so before next week -
sorry for that.
Best regards, Ralf
Thomas Jodes wrote:
> Ralf,
>
> thx for looking into this.
>
> Yes, all right in "our loved Mozilla (with firebug)".
>
> I've edited the last post again and meant the Internet Explorer (8).
> Please have a look to the second half of my edited post...
>
> Greetings, Thomas
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| Re: Execute command Phase Listener for KeyBindings [message #520784 is a reply to message #519604] |
Mon, 15 March 2010 10:30 |
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Hi Thomas,
it seems that the problem is the use of the "keypress" event instead of
"keyup" or "keydown". In IE, if you hold down a key, you get one
keydown, many keypresses and one keyup. The following code seems to work
as expected in IE (tested IE7 and IE8):
doc.addEventListener( "keydown", function( evt ) {
this.debug( "Ctrl: " + evt.isCtrlPressed() + ", Identifier: " +
evt.getKeyIdentifier() );
if( evt.isCtrlPressed() && evt.getKeyIdentifier() == "K" ) {
this.debug( "Ctrl+K detected" );
}
} );
Could you give it another try?
Best regards, Ralf
Thomas Jodes wrote:
> Ups, sorry to write back; one fallback Ralf:
>
> evt.isCtrlPressed() && evt.getKeyIdentifier() == "1"
>
> is not usable because evt is already fired solely from the ctrl key...
> even if crtl is pressed, holded and then "1" pressed, the press for "1"
> is ignored ...
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