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Android : implement InputEventMagnifyGesture and InputEventPanGesture

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sets threshold constants PAN_GESTURE_MIN_DELTA and MAGNIFY_GESTURE_MIN_FACTOR
This commit is contained in:
Jérémy Zurcher 2019-11-02 11:17:22 +01:00
parent ac38f0782f
commit 9cc66495cf
1 changed files with 33 additions and 1 deletions
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34
platform/android/os_android.cpp
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@ -49,6 +49,9 @@
#include "java_godot_io_wrapper.h"
#include "java_godot_wrapper.h"
#define PAN_GESTURE_MIN_DELTA 5 // only advertise PanGesture event with dx and dy greater than this
#define MAGNIFY_GESTURE_MIN_FACTOR 0.1 // only advertise MagnifyGesture event with a factor difference from 1.0 greater than this
class AndroidLogger : public Logger {
public:
virtual void logv(const char *p_format, va_list p_list, bool p_err) {
@ -406,6 +409,35 @@ void OS_Android::process_touch(int p_what, int p_pointer, const Vector<TouchPos>
ERR_FAIL_COND(touch.size() != p_points.size());
if (touch.size() == 1) {
Point2 d = (p_points[0].pos - touch.write[0].pos);
if (fabs(d.x) > PAN_GESTURE_MIN_DELTA || fabs(d.y) > PAN_GESTURE_MIN_DELTA) {
Ref<InputEventPanGesture> ev;
ev.instance();
ev->set_position(p_points[0].pos);
ev->set_delta(d);
input->parse_input_event(ev);
touch.write[0].pos = p_points[0].pos;
}
} else if (touch.size() == 2) {
Point2 v0 = touch[1].pos - touch[0].pos;
float l0 = (v0.x * v0.x) + (v0.y * v0.y);
if (l0 != 0.0) {
Point2 v1 = p_points[1].pos - p_points[0].pos;
float l1 = (v1.x * v1.x) + (v1.y * v1.y);
float f = (l1 / l0);
if (fabs(f - 1.0) > MAGNIFY_GESTURE_MIN_FACTOR) {
Ref<InputEventMagnifyGesture> ev;
ev.instance();
ev->set_position(p_points[0].pos + v1 / 2);
ev->set_factor(sqrt(f));
input->parse_input_event(ev);
touch.write[0].pos = p_points[0].pos;
touch.write[1].pos = p_points[1].pos;
}
}
}
for (int i = 0; i < touch.size(); i++) {
int idx = -1;
@ -420,7 +452,7 @@ void OS_Android::process_touch(int p_what, int p_pointer, const Vector<TouchPos>
ERR_CONTINUE(idx == -1);
if (touch[i].pos == p_points[idx].pos)
continue; //no move unncesearily
continue; //no unnecessary move
Ref<InputEventScreenDrag> ev;
ev.instance();