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Another usability improvement to the touch interface: added a timer for the delta between finger down/up. A 'tap' has to be under a 1/4 second for it to act as a double-click.

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wrenczes@gmail.com
2011-06-15 09:01:26 +00:00
parent c49595bbf2
commit e1dc1afa74
1 changed files with 16 additions and 5 deletions
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21
JGE/src/SDLmain.cpp
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@@ -42,6 +42,9 @@ unsigned int gDisplayMode = DisplayMode_lowRes;
const int kHitzonePliancy = 50; const int kHitzonePliancy = 50;
// tick value equates to ms
const int kTapEventTimeout = 250;
class SdlApp class SdlApp
{ {
public: /* For easy interfacing with JGE static functions */ public: /* For easy interfacing with JGE static functions */
@@ -50,6 +53,7 @@ public: /* For easy interfacing with JGE static functions */
SDL_Surface* Surf_Display; SDL_Surface* Surf_Display;
SDL_Rect viewPort; SDL_Rect viewPort;
Uint32 lastMouseUpTime; Uint32 lastMouseUpTime;
Uint32 lastFingerDownTime;
int windowed_w; int windowed_w;
int windowed_h; int windowed_h;
int windowed_pos_x; int windowed_pos_x;
@@ -59,7 +63,7 @@ public: /* For easy interfacing with JGE static functions */
int mMouseDownY; int mMouseDownY;
public: public:
SdlApp() : Surf_Display(NULL), window(NULL), lastMouseUpTime(0), Running(true), mMouseDownX(0), mMouseDownY(0) SdlApp() : Surf_Display(NULL), window(NULL), lastMouseUpTime(0), lastFingerDownTime(0), Running(true), mMouseDownX(0), mMouseDownY(0)
{ {
} }
@@ -210,7 +214,7 @@ public:
break; break;
case SDL_JOYBALLMOTION: case SDL_JOYBALLMOTION:
DebugTrace("Flick gesture detected"); DebugTrace("Flick gesture detected, x: " << Event->jball.xrel << ", y: " << Event->jball.yrel);
break; break;
} }
} }
@@ -517,19 +521,26 @@ void SdlApp::OnTouchEvent(const SDL_TouchFingerEvent& event)
((event.x - viewPort.x) * SCREEN_WIDTH) / actualWidth, ((event.x - viewPort.x) * SCREEN_WIDTH) / actualWidth,
((event.y - viewPort.y) * SCREEN_HEIGHT) / actualHeight); ((event.y - viewPort.y) * SCREEN_HEIGHT) / actualHeight);
Uint32 eventTime = SDL_GetTicks();
if (event.type == SDL_FINGERDOWN) if (event.type == SDL_FINGERDOWN)
{ {
mMouseDownX = event.x; mMouseDownX = event.x;
mMouseDownY = event.y; mMouseDownY = event.y;
lastFingerDownTime = eventTime;
} }
#if (defined ANDROID) || (defined IOS) #if (defined ANDROID) || (defined IOS)
if (event.type == SDL_FINGERUP) if (event.type == SDL_FINGERUP)
{ {
// treat an up finger within 50 pixels of the down finger coords as a double click event if (eventTime - lastFingerDownTime <= kTapEventTimeout)
if (abs(mMouseDownX - event.x) < kHitzonePliancy && abs(mMouseDownY - event.y) < kHitzonePliancy)
{ {
g_engine->HoldKey_NoRepeat(JGE_BTN_OK); // treat an up finger within 50 pixels of the down finger coords as a double click event
if (abs(mMouseDownX - event.x) < kHitzonePliancy && abs(mMouseDownY - event.y) < kHitzonePliancy)
{
g_engine->HoldKey_NoRepeat(JGE_BTN_OK);
}
} }
} }
#endif #endif