1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#pragma once
#include <functional>
#include "event/SingleIdleCallback.h"
namespace wxutil
{
/**
* A class accumulating mouse motion delta calls. When GTK is idle,
* the attached function object is called with the stored x,y delta values.
*/
class DeferredMotionDelta :
private wxutil::SingleIdleCallback
{
public:
typedef std::function<void(int, int)> MotionDeltaFunction;
private:
int _deltaX;
int _deltaY;
MotionDeltaFunction _function;
public:
DeferredMotionDelta(const MotionDeltaFunction& function) :
_deltaX(0),
_deltaY(0),
_function(function)
{}
void flush()
{
flushIdleCallback();
}
void onMouseMotionDelta(int x, int y, unsigned int state)
{
_deltaX += x;
_deltaY += y;
requestIdleCallback();
}
private:
void onIdle()
{
_function(_deltaX, _deltaY);
_deltaX = 0;
_deltaY = 0;
}
};
} // namespace
|
