author | Jim Grandpre <jim.tla@gmail.com> |
Sun, 15 Aug 2010 00:36:28 -0400 | |
changeset 4689 | f9ab8df6d45a |
child 4690 | baf8195aeb92 |
permissions | -rw-r--r-- |
4689
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
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1 |
=========================================================================== |
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Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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2 |
Events |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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3 |
=========================================================================== |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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4 |
SDL_FINGERDOWN: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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5 |
Sent when a finger (or stylus) is placed on a touch device. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
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6 |
Fields: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
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event.tfinger.touchId - the Id of the touch device. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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event.tfinger.fingerId - the Id of the finger which just went down. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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event.tfinger.x - the x coordinate of the touch (0..touch.xres) |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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event.tfinger.y - the y coordinate of the touch (0..touch.yres) |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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event.tfinger.pressure - the pressure of the touch (0..touch.pressureres) |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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12 |
|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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13 |
SDL_FINGERMOTION: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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Sent when a finger (or stylus) is moved on the touch device. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
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15 |
Fields: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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16 |
Same as FINGERDOWN but with additional: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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event.tfginer.dx - chagne in x coordinate during this motion event. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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event.tfginer.dy - chagne in y coordinate during this motion event. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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SDL_FINGERMOTION: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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21 |
Sent when a finger (or stylus) is lifted from the touch device. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
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22 |
Fields: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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Same as FINGERDOWN. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
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|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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=========================================================================== |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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Functions |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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28 |
=========================================================================== |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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29 |
SDL provides the ability to access the underlying Touch and Finger structures. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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These structures should _never_ be modified. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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The following functions are included from SDL_Touch.h |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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34 |
To get a SDL_Touch device call SDL_GetTouch(touchId). |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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This returns an SDL_Touch*. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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IMPORTANT: If the touch has been removed, or there is no touch with the given ID, SDL_GetTouch will return null. Be sure to check for this! |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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37 |
|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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An SDL_Touch has the following fields: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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39 |
>pressure_max, pressure_min, x_max, x_min, y_max, y_min |
f9ab8df6d45a
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40 |
Which give, respectively, the maximum and minumum values that the touch digitizer can return for pressure, x coordiniate, and y coordinate AS REPORTED BY THE OPERATING SYSTEM. |
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Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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On Mac/iPhone systems _max will always be 0, and _min will always be 1. |
f9ab8df6d45a
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42 |
|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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>xres,yres,pressures: |
f9ab8df6d45a
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The resolution at which x,y, and pressure values are reported. Currently these will always be equal to 2^15, but this may not always be the case. |
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45 |
|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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46 |
>native_xres,native_yres,native_pressureres: |
f9ab8df6d45a
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The native resolution of the touch device AS REPORTED BY THE OPERATING SYSTEM. |
f9ab8df6d45a
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48 |
On Mac/iPhone systems these will always be 1. |
f9ab8df6d45a
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49 |
|
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>num_fingers: |
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The number of fingers currently down on the device. |
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52 |
|
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>fingers: |
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An array of pointers to the fingers which are on the device. |
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|
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|
f9ab8df6d45a
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57 |
The most common reason to get a touch device is to normalize inputs. This would look something like: |
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58 |
|
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59 |
SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId); |
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if(inTouch == NULL) continue; |
f9ab8df6d45a
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61 |
|
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62 |
float x = ((float)event.tfinger.x)/inTouch->xres; |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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63 |
float y = ((float)event.tfinger.y)/inTouch->yres; |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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65 |
|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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66 |
To get an SDL_Finger, call SDL_GetFinger(touch,fingerId), where touch is a pointer to an SDL_Touch device, and fingerId is the id of the requested finger. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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67 |
This returns an SDL_Finger*, or null if the finger does not exist, or has been removed. |
f9ab8df6d45a
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An SDL_Finger is guaranteed to be persistent for the duration of a touch, but it will be de-allocated as soon as the finger is removed. This occurs when the SDL_FINGERUP event is _added_ to the event queue, and thus BEFORE the FINGERUP event is seen. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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As a result, be very careful to check for null return values. |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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70 |
|
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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71 |
An SDL_Finger has the following fields: |
f9ab8df6d45a
Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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72 |
>x,y,pressure: |
f9ab8df6d45a
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73 |
The current coordinates of the touch. |
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>xdelta,ydelta: |
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75 |
The change in position resulting from the last finger motion. |
f9ab8df6d45a
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>last_x, last_y, last_pressure: |
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77 |
The previous coordinates of the touch. |