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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;
// tick value equates to ms
const int kTapEventTimeout = 250;
class SdlApp
{
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_Rect viewPort;
Uint32 lastMouseUpTime;
Uint32 lastFingerDownTime;
int windowed_w;
int windowed_h;
int windowed_pos_x;
@@ -59,7 +63,7 @@ public: /* For easy interfacing with JGE static functions */
int mMouseDownY;
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;
case SDL_JOYBALLMOTION:
DebugTrace("Flick gesture detected");
DebugTrace("Flick gesture detected, x: " << Event->jball.xrel << ", y: " << Event->jball.yrel);
break;
}
}
@@ -517,19 +521,26 @@ void SdlApp::OnTouchEvent(const SDL_TouchFingerEvent& event)
((event.x - viewPort.x) * SCREEN_WIDTH) / actualWidth,
((event.y - viewPort.y) * SCREEN_HEIGHT) / actualHeight);
Uint32 eventTime = SDL_GetTicks();
if (event.type == SDL_FINGERDOWN)
{
mMouseDownX = event.x;
mMouseDownY = event.y;
lastFingerDownTime = eventTime;
}
#if (defined ANDROID) || (defined IOS)
if (event.type == SDL_FINGERUP)
{
// 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)
if (eventTime - lastFingerDownTime <= kTapEventTimeout)
{
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