generic-library/opencv
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Added support for mouse-wheel events on Windows.

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To be used in the mouse callback like this:
    if (CV_EVENT_MOUSEWHEEL == CV_GET_MOUSEWHEEL_EVENT(event))
    {
       int delta= CV_GET_WHEEL_DELTA(event);
       // use delta...
    }
This commit is contained in:
Adi Shavit 2014-01-07 21:17:57 +02:00
parent 9dc0bfc755
commit fecd5c994b
2 changed files with 46 additions and 1 deletions
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9
modules/highgui/include/opencv2/highgui/highgui_c.h
View File

@ -170,7 +170,9 @@ enum
CV_EVENT_MBUTTONUP =6,
CV_EVENT_LBUTTONDBLCLK =7,
CV_EVENT_RBUTTONDBLCLK =8,
CV_EVENT_MBUTTONDBLCLK =9
CV_EVENT_MBUTTONDBLCLK =9,
CV_EVENT_MOUSEWHEEL =10,
CV_EVENT_MOUSEHWHEEL =11
};
enum
@ -183,6 +185,11 @@ enum
CV_EVENT_FLAG_ALTKEY =32
};
#define CV_GET_WHEEL_DELTA(event) ((short)((event >> 16) & 0xffff)) // upper 16 bits
#define CV_GET_MOUSEWHEEL_EVENT(event) (event & 0xffff) // lower 16 bits
typedef void (CV_CDECL *CvMouseCallback )(int event, int x, int y, int flags, void* param);
/* assign callback for mouse events */

38
modules/highgui/src/window_w32.cpp
View File

@ -40,6 +40,7 @@
//M*/
#include "precomp.hpp"
#include <windowsx.h> // required for GET_X_LPARAM() and GET_Y_LPARAM() marco
#if defined WIN32 || defined _WIN32
@ -1377,6 +1378,43 @@ MainWindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
SetFocus(window->hwnd);
break;
case WM_MOUSEWHEEL:
case WM_MOUSEHWHEEL:
if( window->on_mouse )
{
int flags = (wParam & MK_LBUTTON ? CV_EVENT_FLAG_LBUTTON : 0)|
(wParam & MK_RBUTTON ? CV_EVENT_FLAG_RBUTTON : 0)|
(wParam & MK_MBUTTON ? CV_EVENT_FLAG_MBUTTON : 0)|
(wParam & MK_CONTROL ? CV_EVENT_FLAG_CTRLKEY : 0)|
(wParam & MK_SHIFT ? CV_EVENT_FLAG_SHIFTKEY : 0)|
(GetKeyState(VK_MENU) < 0 ? CV_EVENT_FLAG_ALTKEY : 0);
int event = (uMsg == WM_MOUSEWHEEL ? CV_EVENT_MOUSEWHEEL : CV_EVENT_MOUSEHWHEEL);
// Set the wheel delta of mouse wheel to be in the upper word of 'event'
int delta = GET_WHEEL_DELTA_WPARAM(wParam);
event |= (delta << 16);
POINT pt;
{
// since The coordinates are relative to screen so get screen size.
RECT windowRect;
::GetWindowRect( window->hwnd, &windowRect );
pt.x = GET_X_LPARAM( lParam ) - windowRect.left;
pt.y = GET_Y_LPARAM( lParam ) - windowRect.top;
}
RECT rect;
GetClientRect( window->hwnd, &rect );
SIZE size = {0,0};
icvGetBitmapData( window, &size, 0, 0 );
window->on_mouse( event, pt.x*size.cx/MAX(rect.right - rect.left,1),
pt.y*size.cy/MAX(rect.bottom - rect.top,1), flags,
window->on_mouse_param );
}
break;
case WM_ERASEBKGND:
{
RECT cr, tr, wrc;