Difference between revisions of "Patch Camera Using Volume Buttons to Take a Picture"
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<pre><nowiki> | <pre><nowiki> | ||
− | --- capture-assistant. | + | --- sftp://Palm Pre/apps/com.palm.app.camera/app/controllers/capture-assistant.js.webosinternals.orig |
− | +++ capture-assistant.js | + | +++ sftp://Palm Pre/apps/com.palm.app.camera/app/controllers/capture-assistant.js |
− | @@ - | + | @@ -134,6 +134,7 @@ |
− | this | + | this._handleCaptureToggle(); |
+ | }.bind(this)); | ||
} | } | ||
+ | + this.volumeKeySubscription = undefined; | ||
− | + | + | |
− | + | ||
− | + | @@ -164,6 +165,15 @@ | |
+ | 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 47: | Line 46: | ||
+ 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));}}, |
− | + | @@ -332,6 +342,11 @@ | |
− | @@ - | ||
} | } | ||
Line 63: | Line 61: | ||
handleCommand: function(event){ | handleCommand: function(event){ | ||
− | @@ - | + | @@ -383,6 +398,13 @@ |
− | + | } | |
− | + | }, | |
− | + | ||
− | |||
− | |||
− | |||
− | |||
+ // capture on release of volume keys | + // capture on release of volume keys | ||
+ handleVolumeKeys: function(payload) { | + handleVolumeKeys: function(payload) { | ||
+ // capture when either volume up or down buttons are released | + // capture when either volume up or down buttons are released | ||
+ if(payload.state === 'up' && (payload.key === 'volume_up' || payload.key === 'volume_down')) { | + if(payload.state === 'up' && (payload.key === 'volume_up' || payload.key === 'volume_down')) { | ||
− | + | + this.cameraControl.stillCapture(); | |
− | + | + } | |
− | + | + }, | |
+ | |||
+ | /** | ||
+ | * Called by Mojo when the orientation of the device changes. | ||
</nowiki></pre> | </nowiki></pre> | ||
Revision as of 18:22, 2 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.
--- sftp://Palm Pre/apps/com.palm.app.camera/app/controllers/capture-assistant.js.webosinternals.orig +++ sftp://Palm Pre/apps/com.palm.app.camera/app/controllers/capture-assistant.js @@ -134,6 +134,7 @@ this._handleCaptureToggle(); }.bind(this)); } + this.volumeKeySubscription = undefined; @@ -164,6 +165,15 @@ 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 +342,11 @@ } this.cameraControl.closeCamera(); + + // clean up listener for volume keys + if(this.volumeKeySubscription) { + this.volumeKeySubscription.cancel(); + } }, handleCommand: function(event){ @@ -383,6 +398,13 @@ } }, + // 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(); + } + }, /** * Called by Mojo when the orientation of the device changes.
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