Re: finding the mousecolor in IOS
On Jul 13, 2012, at 9:11 AM, Colin Holgate wrote: One exercise in that book I wrote is about using an image as a color picker. It uses the same technique as Scott mentioned, only I then set the color of another graphic to show that it has picked up the right color. One thing to double check, the x and y values you're using, are those from the top left of the image? With mousecolor you use the card position, but with this imagedata technique you would subtract the left and top of the image in question, unless the image is the whole card. function relativeXY tObjRef,x,y -- input: x,y (card coordinates) -- output: coordinates relative to an object's rect put the topleft of tObjRef into tl put item 1 of tl into baseHoriz put item 2 of tl into baseVert return (x - baseHoriz comma y - baseVert) end relativeXY -- Peter Peter M. Brigham pmb...@gmail.com http://home.comcast.net/~pmbrig ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
One exercise in that book I wrote is about using an image as a color picker. It uses the same technique as Scott mentioned, only I then set the color of another graphic to show that it has picked up the right color. One thing to double check, the x and y values you're using, are those from the top left of the image? With mousecolor you use the card position, but with this imagedata technique you would subtract the left and top of the image in question, unless the image is the whole card. ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
On Fri, Jul 13, 2012 at 6:11 AM, Colin Holgate co...@verizon.net wrote: One exercise in that book I wrote is about using an image as a color picker. It uses the same technique as Scott mentioned, only I then set the color of another graphic to show that it has picked up the right color. That's exactly what I'm doing. I'm using the color picker to set the color of text, modifying the text color in real time as the user moves around the color wheel by touch. Can you give more information about the book you wrote? It sounds interesting. One thing to double check, the x and y values you're using, are those from the top left of the image? With mousecolor you use the card position, but with this imagedata technique you would subtract the left and top of the image in question, unless the image is the whole card. I'm assuming Scott's technique does this. His description is: This should retrieve the color of a pixel in a target image based on the X,Y offset of the touch from the topLeft. I've been busy with other things and haven't been able to check to make sure I haven't done something dumb with his code, but I've been assuming that is how this works. -- Regards, Howard Bornstein --- www.designeq.com ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
finding the mousecolor in IOS
I'm designing a an IOS app that makes extensive use of determining the mousecolor. Everything is working fine in my stack, but when I port it to the simulator (or create the IOS app), the mousecolor only returns 0,0,0 regardless of where the mouse is. I found some early posts from last year discussing this issue and they conclude that the mousecolor can't be supported under IOS because there is no way to determine which pixel is being specified (I guess because our fingers are fatter than a single pixel). However, this doesn't make sense. If you put this script into the card of a stack and run it in the simulator (it also works in an actual IOS app), it gives you the point your finger is pressing on the iphone: *on* mousemove *put* the mouseloc : the mousecolor into fld location *end* mousemove However, the mousecolor, as I mentioned, is always black. Since LC can determine a specific pixel (or at least aggregates the points you are touching down to a specific pixel) it doesn't seem like there is any reason it can't get the mousecolor under that pixel. In addition, I found this comment in the release notes for IOS 4.5.3: *release-17 (2010-12-01)* ** *Fixed issue with 'the mouseColor' causing a crash* This implies to me that the mousecolor is supported under IOS. So, has anyone gotten this to work or has anyone found another way to get the mousecolor for a point on an IOS screen? -- Regards, Howard Bornstein --- www.designeq.com ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
On Thu, Jul 12, 2012 at 3:18 PM, Scott Rossi sc...@tactilemedia.com wrote: Hi Howard: It seems the mouseColor is not functional on iOS in 5.5.1 (but apparently it has been fixed on Lion which is a huge relief). I don't understand this because you are comparing IOS and Lion. MouseColor already works fine in OSX. Do you mean that if you compile an IOS app under Lion, then mouseColor will work? Is this a RunRev change or does it have something to do with OSX? As I pointed out, given that IOS can identify a pixel point, I don't see any technical reason why it can't grab the color of that point (using mouseColor). I will check with the mother ship to see if I can get any clarity on this That said, if you can work with an image as your color source (ie import a snapshot if needed), you can use the following function as a workaround (watch wrap): THANK YOU SCOTT! I thought this might be a way to proceed, but since I really don't know my way around imageData, I was despairing to undertake the experiment. You've saved me a huge amount of time. local theImageData function getPixelColor pImage,pX,pY if theImageData is empty then put the imageData of pImage into theImageData put width of pImage into W put ((pY-1)*W)*4+pX*4 into lastChar put charToNum(char lastChar of theImageData) into B put charToNum(char lastChar-1 of theImageData) into G put charToNum(char lastChar-2 of theImageData) into R return R,G,B end getPixelColor This should retrieve the color of a pixel in a target image based on the X,Y offset of the touch from the topLeft. The idea is to store the imageData of the target image in theImageData variable so the function doesn't have to retrieve it repeatedly. I've been wanting mouseColor on iOS myself and while not true mouseColor, this comes close. Hope this helps. I did a quick test of this, outputting the color from both your function and from mouseColor to compare. While your function is close, it isn't giving me the same colors as mouseColor. I will have to go back and see if I didn't do something stupid, but the truth is, for the level of granularity I need, your function will work, even if it isn't exactly the same as mouseColor. Thank you again. This is a BIG help! Recently, Howard Bornstein wrote: I'm designing a an IOS app that makes extensive use of determining the mousecolor. Everything is working fine in my stack, but when I port it to the simulator (or create the IOS app), the mousecolor only returns 0,0,0 regardless of where the mouse is. I found some early posts from last year discussing this issue and they conclude that the mousecolor can't be supported under IOS because there is no way to determine which pixel is being specified (I guess because our fingers are fatter than a single pixel). However, this doesn't make sense. If you put this script into the card of a stack and run it in the simulator (it also works in an actual IOS app), it gives you the point your finger is pressing on the iphone: *on* mousemove *put* the mouseloc : the mousecolor into fld location *end* mousemove However, the mousecolor, as I mentioned, is always black. Since LC can determine a specific pixel (or at least aggregates the points you are touching down to a specific pixel) it doesn't seem like there is any reason it can't get the mousecolor under that pixel. In addition, I found this comment in the release notes for IOS 4.5.3: *release-17 (2010-12-01)* ** *Fixed issue with 'the mouseColor' causing a crash* This implies to me that the mousecolor is supported under IOS. So, has anyone gotten this to work or has anyone found another way to get the mousecolor for a point on an IOS screen? ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
Try this line before doing the snapshot: set the screengamma to 2.23 LiveCode changes the values in image data depending on the color settings of the screen, and doing a snapshot of the card's graphics is likely to lead to different data. On Jul 12, 2012, at 7:23 PM, Howard Bornstein bornst...@designeq.com wrote: I did a quick test of this, outputting the color from both your function and from mouseColor to compare. While your function is close, it isn't giving me the same colors as mouseColor. ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
If you're working with an imported or referenced image, it would probably better to strip the gamma from the source image all together, using something like ColorSync Utility or similar -- as mentioned by Tim Bobo -- rather than changing the gamma of the screen. But if you're working with a snapshot, you don't really have any other option. Regards, Scott Rossi Creative Director Tactile Media, UX Design Recently, Colin Holgate wrote: Try this line before doing the snapshot: set the screengamma to 2.23 LiveCode changes the values in image data depending on the color settings of the screen, and doing a snapshot of the card's graphics is likely to lead to different data. On Jul 12, 2012, at 7:23 PM, Howard Bornstein bornst...@designeq.com wrote: I did a quick test of this, outputting the color from both your function and from mouseColor to compare. While your function is close, it isn't giving me the same colors as mouseColor. ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
Recently, Howard Bornstein wrote: It seems the mouseColor is not functional on iOS in 5.5.1 (but apparently it has been fixed on Lion which is a huge relief). I don't understand this because you are comparing IOS and Lion. MouseColor already works fine in OSX. Do you mean that if you compile an IOS app under Lion, then mouseColor will work? Is this a RunRev change or does it have something to do with OSX? I mentioned this because until recently, mouseColor was broken on OSX Lion, so you couldn't even use the function on desktop, not to mention iOS. For those of use that develop tools, this was a problem. Fortunately, the RunRev guys appeared to have fixed it. Regards, Scott Rossi Creative Director Tactile Media, UX Design ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
Ah, I see. Thanks for the clarification. I've been putting on switching to Lion for as long as possible so I haven't seen that problem. I guess I'll have to bite the bullet with Mountain Lion though. On Thu, Jul 12, 2012 at 4:56 PM, Scott Rossi sc...@tactilemedia.com wrote: Recently, Howard Bornstein wrote: It seems the mouseColor is not functional on iOS in 5.5.1 (but apparently it has been fixed on Lion which is a huge relief). I don't understand this because you are comparing IOS and Lion. MouseColor already works fine in OSX. Do you mean that if you compile an IOS app under Lion, then mouseColor will work? Is this a RunRev change or does it have something to do with OSX? I mentioned this because until recently, mouseColor was broken on OSX Lion, so you couldn't even use the function on desktop, not to mention iOS. For those of use that develop tools, this was a problem. Fortunately, the RunRev guys appeared to have fixed it. Regards, Scott Rossi Creative Director Tactile Media, UX Design ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode -- Regards, Howard Bornstein --- www.designeq.com ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: finding the mousecolor in IOS
I haven't had time to pursue any of this yet, but do you think the gamma would explain why I'm getting different values with Scott's routine versus the built-in mouseColor function? Btw, I'm using an imported image that I haven't modified in any way. This is all so I can build my own color picker for IOS. On Thu, Jul 12, 2012 at 4:34 PM, Colin Holgate co...@verizon.net wrote: Try this line before doing the snapshot: set the screengamma to 2.23 LiveCode changes the values in image data depending on the color settings of the screen, and doing a snapshot of the card's graphics is likely to lead to different data. On Jul 12, 2012, at 7:23 PM, Howard Bornstein bornst...@designeq.com wrote: I did a quick test of this, outputting the color from both your function and from mouseColor to compare. While your function is close, it isn't giving me the same colors as mouseColor. ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode -- Regards, Howard Bornstein --- www.designeq.com ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
