touch filter

eez-open · Nov 28, 2019 · cd35ecd · cd35ecd
1 parent 5b5d1fd
commit cd35ecd
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Showing 3 changed files with 12 additions and 8 deletions.
diff --git a/src/eez/gui/event.cpp b/src/eez/gui/event.cpp
@@ -206,6 +206,7 @@ void processTouchEvent(EventType type) {
 #if defined(EEZ_PLATFORM_STM32)    
     if (type == EVENT_TYPE_TOUCH_MOVE) {
         // ignore EVENT_TYPE_TOUCH_MOVE if it is the same as the last event
+        // or change is too big
     	int dx = (m_lastTouchMoveX - x);
     	int dy = (m_lastTouchMoveY - y);
     	int d = dx * dx + dy * dy;

diff --git a/src/eez/gui/touch.cpp b/src/eez/gui/touch.cpp
@@ -39,11 +39,14 @@ void tick() {
 
     mcu::touch::read(touchIsPressed, g_x, g_y);
 
-    if (touchIsPressed) {
 #ifndef EEZ_PLATFORM_SIMULATOR
-        transform(g_x, g_y);
+        touchIsPressed = filter(touchIsPressed, g_x, g_y);
+        if (touchIsPressed) {
+            transform(g_x, g_y);
+        }
 #endif
 
+    if (touchIsPressed) {
         if (g_eventType == EVENT_TYPE_TOUCH_NONE || g_eventType == EVENT_TYPE_TOUCH_UP) {
             g_eventType = EVENT_TYPE_TOUCH_DOWN;
         } else {

diff --git a/src/eez/gui/touch_filter.cpp b/src/eez/gui/touch_filter.cpp
@@ -24,13 +24,13 @@
 // Thanks to: http://dlbeer.co.nz/articles/tsf.html
 //
 
-#define CONF_GUI_TOUCH_FILTER_N 0
-#define CONF_GUI_TOUCH_FILTER_D 1
-#define CONF_GUI_TOUCH_FILTER_P 5
+// #define CONF_GUI_TOUCH_FILTER_N 0
+// #define CONF_GUI_TOUCH_FILTER_D 1
+// #define CONF_GUI_TOUCH_FILTER_P 5
 
-// #define CONF_GUI_TOUCH_FILTER_N 5
-// #define CONF_GUI_TOUCH_FILTER_D 10
-// #define CONF_GUI_TOUCH_FILTER_P 10
+#define CONF_GUI_TOUCH_FILTER_N 5   // level of smoothing in the form of a fraction N / D
+#define CONF_GUI_TOUCH_FILTER_D 10 
+#define CONF_GUI_TOUCH_FILTER_P 3   // debounce
 
 namespace eez {
 namespace gui {