Difference between revisions of "Patch Camera Using Volume Buttons to Take a Picture"
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(→Procedure: fixed malformed patch) |
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Line 23: | Line 23: | ||
<pre><nowiki> | <pre><nowiki> | ||
− | --- | + | --- a/usr/palm/applications/com.palm.app.camera/app/controllers/capture-assistant.js |
− | +++ | + | +++ b/usr/palm/applications/com.palm.app.camera/app/controllers/capture-assistant.js |
@@ -134,6 +134,7 @@ | @@ -134,6 +134,7 @@ | ||
this._handleCaptureToggle(); | this._handleCaptureToggle(); | ||
}.bind(this)); | }.bind(this)); | ||
} | } | ||
− | + this.volumeKeySubscription = | + | + this.volumeKeySubscription = null; |
− | @@ -164, | + | @@ -136,7 +137,6 @@ |
+ | } | ||
+ | |||
+ | |||
+ | - | ||
+ | this.onKeyPressHandler = this.onKeyPress.bindAsEventListener(this); | ||
+ | Mojo.listen(this.controller.sceneElement, Mojo.Event.keydown, this.onKeyPressHandler); | ||
+ | Mojo.listen(this.controller.sceneElement, Mojo.Event.keyup, this.onKeyPressHandler); | ||
+ | @@ -164,7 +164,16 @@ | ||
AppAssistant.photoRollVideoLoader = AppAssistant.libraries["metascene.videos"]; | AppAssistant.photoRollVideoLoader = AppAssistant.libraries["metascene.videos"]; | ||
} | } | ||
+ | - | ||
+ // listen to volume key events | + // listen to volume key events | ||
+ this.volumeKeySubscription = new Mojo.Service.Request( | + this.volumeKeySubscription = new Mojo.Service.Request( | ||
Line 46: | Line 55: | ||
+ onSuccess: this.handleVolumeKeys.bind(this), | + onSuccess: this.handleVolumeKeys.bind(this), | ||
+ }); | + }); | ||
− | + | + | |
llog("CaptureAssistant::setup() finished"); | llog("CaptureAssistant::setup() finished"); | ||
}catch(e){llog("setup threw: "+Object.toJSON(e));}}, | }catch(e){llog("setup threw: "+Object.toJSON(e));}}, | ||
− | @@ -332,6 + | + | |
+ | @@ -332,6 +341,11 @@ | ||
} | } | ||
Line 57: | Line 67: | ||
+ if(this.volumeKeySubscription) { | + if(this.volumeKeySubscription) { | ||
+ this.volumeKeySubscription.cancel(); | + this.volumeKeySubscription.cancel(); | ||
− | + } | + | + } |
}, | }, | ||
handleCommand: function(event){ | handleCommand: function(event){ | ||
− | @@ - | + | @@ -382,6 +396,14 @@ |
+ | this.cameraControl.stillCapture(); | ||
} | } | ||
}, | }, | ||
− | + | + | |
+ // capture on release of volume keys | + // capture on release of volume keys | ||
+ handleVolumeKeys: function(payload) { | + handleVolumeKeys: function(payload) { | ||
Line 71: | Line 82: | ||
+ this.cameraControl.stillCapture(); | + this.cameraControl.stillCapture(); | ||
+ } | + } | ||
− | + | + | + }, |
+ | |||
/** | /** | ||
− | |||
</nowiki></pre> | </nowiki></pre> | ||
Latest revision as of 01:14, 7 April 2010
Note: If you are only looking for a hardware-based button to take a picture, the space bar will do that for you already.
Preamble
You will need write permissions to the filesystem on your Pre to apply this patch.
To get write persmissions execute:
rootfs_open -w
To remount the filesystem as read-only:
mount -o remount,ro /
Procedure
The patch is performed on /usr/palm/applications/com.palm.app.camera/app/controllers/capture-assistant.js. Please back up this file before proceeding.
--- a/usr/palm/applications/com.palm.app.camera/app/controllers/capture-assistant.js +++ b/usr/palm/applications/com.palm.app.camera/app/controllers/capture-assistant.js @@ -134,6 +134,7 @@ this._handleCaptureToggle(); }.bind(this)); } + this.volumeKeySubscription = null; @@ -136,7 +137,6 @@ } - this.onKeyPressHandler = this.onKeyPress.bindAsEventListener(this); Mojo.listen(this.controller.sceneElement, Mojo.Event.keydown, this.onKeyPressHandler); Mojo.listen(this.controller.sceneElement, Mojo.Event.keyup, this.onKeyPressHandler); @@ -164,7 +164,16 @@ AppAssistant.photoRollVideoLoader = AppAssistant.libraries["metascene.videos"]; } - + // listen to volume key events + this.volumeKeySubscription = new Mojo.Service.Request( + 'palm://com.palm.keys/audio', + { + method: 'status', + parameters: {'subscribe': true}, + onFailure: function() { Mojo.Log.error("Could not subscribe to volume key events"); }, + onSuccess: this.handleVolumeKeys.bind(this), + }); + llog("CaptureAssistant::setup() finished"); }catch(e){llog("setup threw: "+Object.toJSON(e));}}, @@ -332,6 +341,11 @@ } this.cameraControl.closeCamera(); + + // clean up listener for volume keys + if(this.volumeKeySubscription) { + this.volumeKeySubscription.cancel(); + } }, handleCommand: function(event){ @@ -382,6 +396,14 @@ this.cameraControl.stillCapture(); } }, + + // capture on release of volume keys + handleVolumeKeys: function(payload) { + // capture when either volume up or down buttons are released + if(payload.state === 'up' && (payload.key === 'volume_up' || payload.key === 'volume_down')) { + this.cameraControl.stillCapture(); + } + }, /**
Notes
Volume Control
The keys will still alter the volume of the device. There is a way to lock the buttons so that they don't modify volume when pressed but still report events. Needs futher investigation.
~FXDemolisher