///
// ESWindowProc()
//
// Main window procedure
//
LRESULT WINAPI ESWindowProc ( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
static POINT mousePoint;
LRESULT lRet = 1;
switch (uMsg)
{
case WM_CREATE:
break;
case WM_SIZE:
{
ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWnd, GWL_USERDATA );
if ( esContext ) {
esContext->width = LOWORD( lParam );
esContext->height = HIWORD( lParam );
InvalidateRect( esContext->hWnd, NULL, FALSE );
}
}
case WM_PAINT:
{
ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWnd, GWL_USERDATA );
if ( esContext && esContext->drawFunc )
esContext->drawFunc ( esContext );
if ( esContext )
ValidateRect( esContext->hWnd, NULL );
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_LBUTTONDOWN:
{
ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWnd, GWL_USERDATA );
mousePoint.x = GET_X_LPARAM(lParam);
mousePoint.y = GET_Y_LPARAM(lParam);
if ( esContext && esContext->lButtomDownFunc )
esContext->lButtomDownFunc ( esContext, (int) mousePoint.x, (int) mousePoint.y );
}
break;
case WM_LBUTTONUP:
{
POINT point;
ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWnd, GWL_USERDATA );
point.x = GET_X_LPARAM(lParam);
point.y = GET_Y_LPARAM(lParam);
if ( esContext && esContext->lButtomUpFunc )
esContext->lButtomUpFunc ( esContext, (int) point.x, (int) point.y );
}
break;
case WM_MOUSEMOVE:
{
POINT point;
ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWnd, GWL_USERDATA );
point.x = GET_X_LPARAM(lParam);
point.y = GET_Y_LPARAM(lParam);
if (wParam & MK_LBUTTON) // drag event
if ( esContext && esContext->mouseDragFunc )
esContext->mouseDragFunc ( esContext,
(int) mousePoint.x, (int) mousePoint.y,
(int) point.x, (int) point.y );
mousePoint = point; // point update
}
break;
case WM_CHAR:
{
POINT point;
ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWnd, GWL_USERDATA );
GetCursorPos( &point );
if ( esContext && esContext->keyFunc )
esContext->keyFunc ( esContext, (unsigned char) wParam,
(int) point.x, (int) point.y );
}
break;
default:
lRet = DefWindowProc (hWnd, uMsg, wParam, lParam);
break;
}
return lRet;
}
