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| carbon event handling [message #441622] |
Tue, 17 August 2004 17:00  |
Eclipse User |
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Originally posted by: eclipse.physarum.net
This is a multi-part message in MIME format.
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Hi, I'm wondering if somebody can help:
The code below installs a carbon event handler for mouse-down events,
using native methods from org.eclipse.swt.internal.carbon.*. The strange
thing is that it doesn't seem to receive mouse-down events from
left-clicks (primary button?), but it works for right-clicks.
The reason I'm using carbon events instead of SWT's is that I'm planning
to interface with a mac tablet (wacom) driver, which generates Carbon
tablet events. So I'll be adding constants like:
public static final int kEventClassTablet = ('t'<<24) + ('b'<<16) +
('l'<<8) + 't';
, and use them with OS.InstallEventHandler, etc.
---
/* snip */
Object target = new Object() {
int mouseProc(int nextHandler, int theEvent, int userData) {
switch (OS.GetEventKind(theEvent)) {
case OS.kEventMouseDown:
System.out.println("Mouse Down");
return OS.eventNotHandledErr;
}
return OS.eventNotHandledErr;
}};
final Callback mouseCallback = new Callback(target, "mouseProc", 3);
int mouseProc = mouseCallback.getAddress();
if (mouseProc == 0) {
mouseCallback.dispose();
return;
}
int[] mask = new int[] { OS.kEventClassMouse, OS.kEventMouseDown };
OS.InstallEventHandler(OS.GetApplicationEventTarget(), mouseProc,
mask.length/2, mask, 0, null);
/* snip */
(Full code attached).
Thanks,
stan
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name="MouseEvents.java"
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filename="MouseEvents.java"
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.internal.carbon.*;
import org.eclipse.swt.internal.Callback;
public class MouseEvents
{
public static void main (String[] args)
{
Display display = new Display();
Shell shell = new Shell(display);
shell.setSize(500, 500);
Object target = new Object() {
int mouseProc(int nextHandler, int theEvent, int userData) {
switch (OS.GetEventKind(theEvent)) {
case OS.kEventMouseDown:
System.out.println("Mouse Down");
return OS.eventNotHandledErr;
}
return OS.eventNotHandledErr;
}};
final Callback mouseCallback = new Callback(target, "mouseProc", 3);
int mouseProc = mouseCallback.getAddress();
if (mouseProc == 0) {
mouseCallback.dispose();
return;
}
int[] mask = new int[] { OS.kEventClassMouse, OS.kEventMouseDown };
OS.InstallEventHandler(OS.GetApplicationEventTarget(),
mouseProc, mask.length/2, mask, 0, null);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
mouseCallback.dispose();
}
}
--------------080409060703080105070404--
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| Re: carbon event handling [message #441626 is a reply to message #441622] |
Tue, 17 August 2004 20:47  |
 Silenio Quarti
Messages: 31
Registered: July 2009 |
Member |
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Try adding the mouse down handler to the window too. I am not sure why,
but I believe this is necessary. See Shell.hookEvents() for an example.
....
int windowTarget = OS.GetWindowEventTarget (shellHandle);
OS.InstallEventHandler (windowTarget, windowProc, mask1.length / 2, mask1,
shellHandle, null);
int [] mask2 = new int [] {
OS.kEventClassMouse, OS.kEventMouseDown,
OS.kEventClassMouse, OS.kEventMouseDragged,
// OS.kEventClassMouse, OS.kEventMouseEntered,
// OS.kEventClassMouse, OS.kEventMouseExited,
OS.kEventClassMouse, OS.kEventMouseMoved,
OS.kEventClassMouse, OS.kEventMouseUp,
OS.kEventClassMouse, OS.kEventMouseWheelMoved,
};
OS.InstallEventHandler (windowTarget, mouseProc, mask2.length / 2, mask2,
shellHandle, null);
....
Silenio
Stanley Gunawan wrote:
> Hi, I'm wondering if somebody can help:
> The code below installs a carbon event handler for mouse-down events,
> using native methods from org.eclipse.swt.internal.carbon.*. The strange
> thing is that it doesn't seem to receive mouse-down events from
> left-clicks (primary button?), but it works for right-clicks.
> The reason I'm using carbon events instead of SWT's is that I'm planning
> to interface with a mac tablet (wacom) driver, which generates Carbon
> tablet events. So I'll be adding constants like:
> public static final int kEventClassTablet = ('t'<<24) + ('b'<<16) +
> ('l'<<8) + 't';
> , and use them with OS.InstallEventHandler, etc.
> ---
> /* snip */
> Object target = new Object() {
> int mouseProc(int nextHandler, int theEvent, int userData) {
> switch (OS.GetEventKind(theEvent)) {
> case OS.kEventMouseDown:
> System.out.println("Mouse Down");
> return OS.eventNotHandledErr;
> }
> return OS.eventNotHandledErr;
> }};
> final Callback mouseCallback = new Callback(target, "mouseProc", 3);
> int mouseProc = mouseCallback.getAddress();
> if (mouseProc == 0) {
> mouseCallback.dispose();
> return;
> }
> int[] mask = new int[] { OS.kEventClassMouse, OS.kEventMouseDown };
> OS.InstallEventHandler(OS.GetApplicationEventTarget(), mouseProc,
> mask.length/2, mask, 0, null);
> /* snip */
> (Full code attached).
> Thanks,
> stan
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| Re: carbon event handling [message #441630 is a reply to message #441628] |
Wed, 18 August 2004 03:38 |
| Eclipse User |
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Originally posted by: eclipse.physarum.net
Thanks,
Although the second thing that I was about to ask was that:
OS.GetWindowEventTarget(shell.handle)
doesn't seen work (i.e. returns 0), although in Shell.java
(createHandle()), OS.GetWindowEventTarget() clearly gets used on a shell
handle (the result of creating a new window, a local var called
shellHandle). And yes, the value of shell.handle itself seems valid.
Thanks,
stan
Brion Vibber wrote:
> Silenio Quarti wrote:
>
>> Try adding the mouse down handler to the window too. I am not sure why,
>> but I believe this is necessary. See Shell.hookEvents() for an example.
>
>
> IIRC events propagate from specific to general, so if there's already a
> window event handler eating the events you won't see them in the
> application handler.
>
> See
> http://developer.apple.com/documentation/Carbon/Conceptual/C arbon_Event_Manager/Concept/chapter_17_section_2.html
>
>
> -- brion vibber (brion @ pobox.com)
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| Re: carbon event handling [message #441633 is a reply to message #441630] |
Wed, 18 August 2004 06:42 |
| Eclipse User |
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Originally posted by: eclipse.physarum.net
Stanley Gunawan wrote:
> Thanks,
>
> Although the second thing that I was about to ask was that:
>
> OS.GetWindowEventTarget(shell.handle)
>
> doesn't seen work (i.e. returns 0), although in Shell.java
> (createHandle()), OS.GetWindowEventTarget() clearly gets used on a shell
> handle (the result of creating a new window, a local var called
> shellHandle). And yes, the value of shell.handle itself seems valid.
>
Sorry, I forgot to mention that OS.GetControlEventTarget(shell.handle)
seems to work, but when passed to OS.InstallEventHandler, no events seem
to get noticed.
Interestingly, so does doing that to a button, e.g.:
Button button = new Button(shell, SWT.PUSH); button.setText("Push me!");
OS.InstallEventHandler(OS.GetControlEventTarget(button.handl e), ....);
etc.
So, it seems only GetApplicationEventTarget() works...
Any idea?
Thanks,
stan
> Thanks,
> stan
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| Re: carbon event handling [message #441634 is a reply to message #441633] |
Wed, 18 August 2004 07:08 |
Silenio Quarti
Messages: 31
Registered: July 2009 |
Member |
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You need to pass "shellHandle" (which is a window handle) and not
"shell.handle" (which is a control handle). The problem is that
Shell.shellHandle is not public, but you can get the window handle given a
control handle with the following code:
int control = shell.handle;
int shellHandle = OS.GetControlOwner (control);
Silenio
Stanley Gunawan wrote:
> Stanley Gunawan wrote:
> > Thanks,
> >
> > Although the second thing that I was about to ask was that:
> >
> > OS.GetWindowEventTarget(shell.handle)
> >
> > doesn't seen work (i.e. returns 0), although in Shell.java
> > (createHandle()), OS.GetWindowEventTarget() clearly gets used on a shell
> > handle (the result of creating a new window, a local var called
> > shellHandle). And yes, the value of shell.handle itself seems valid.
> >
> Sorry, I forgot to mention that OS.GetControlEventTarget(shell.handle)
> seems to work, but when passed to OS.InstallEventHandler, no events seem
> to get noticed.
> Interestingly, so does doing that to a button, e.g.:
> Button button = new Button(shell, SWT.PUSH); button.setText("Push me!");
> OS.InstallEventHandler(OS.GetControlEventTarget(button.handl e), ....);
> etc.
> So, it seems only GetApplicationEventTarget() works...
> Any idea?
> Thanks,
> stan
> > Thanks,
> > stan
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| Re: carbon event handling [message #441636 is a reply to message #441634] |
Wed, 18 August 2004 07:30 |
| Eclipse User |
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Originally posted by: eclipse.physarum.net
Silenio Quarti wrote:
> You need to pass "shellHandle" (which is a window handle) and not
> "shell.handle" (which is a control handle). The problem is that
> Shell.shellHandle is not public, but you can get the window handle given a
> control handle with the following code:
>
Thanks!! That fixed everything! =)
--
stan
> int control = shell.handle;
> int shellHandle = OS.GetControlOwner (control);
>
> Silenio
>
>
> Stanley Gunawan wrote:
>
>
>>Stanley Gunawan wrote:
>
>
>>>Thanks,
>>>
>>>Although the second thing that I was about to ask was that:
>>>
>>>OS.GetWindowEventTarget(shell.handle)
>>>
>>>doesn't seen work (i.e. returns 0), although in Shell.java
>>>(createHandle()), OS.GetWindowEventTarget() clearly gets used on a shell
>>>handle (the result of creating a new window, a local var called
>>>shellHandle). And yes, the value of shell.handle itself seems valid.
>>>
>
>
>>Sorry, I forgot to mention that OS.GetControlEventTarget(shell.handle)
>>seems to work, but when passed to OS.InstallEventHandler, no events seem
>>to get noticed.
>>Interestingly, so does doing that to a button, e.g.:
>
>
>>Button button = new Button(shell, SWT.PUSH); button.setText("Push me!");
>> OS.InstallEventHandler(OS.GetControlEventTarget(button.handl e), ....);
>>etc.
>
>
>>So, it seems only GetApplicationEventTarget() works...
>
>
>>Any idea?
>
>
>>Thanks,
>>stan
>
>
>>>Thanks,
>>>stan
>
>
>
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