[mf] 18372: display source rectangle

display source rectangle
Modified: trunk/rosapps/devutils/zoomin/framewnd.c
  _____

Modified: trunk/rosapps/devutils/zoomin/framewnd.c
--- trunk/rosapps/devutils/zoomin/framewnd.c	2005-10-09 08:38:29 UTC
(rev 18371)
+++ trunk/rosapps/devutils/zoomin/framewnd.c	2005-10-09 11:24:51 UTC
(rev 18372)
@@ -36,9 +36,12 @@

static int s_factor = 2;	// zoom factor

-static POINT s_srcPos = {0, 0}; // zoom factor
+static POINT s_srcPos = {0, 0};			// source
rectangle position
+static RECT s_lastSrc = {-1,-1,-1,-1};	// last cursor position

+BOOL s_dragging = FALSE;

+

////////////////////////////////////////////////////////////////////////
////////
 // Local module support methods
 //
@@ -97,15 +100,15 @@
    case WM_PAINT: {
    	PAINTSTRUCT ps;
    	HDC hdcMem;
-		RECT rect;
+		RECT clnt;
    	SIZE size;

BeginPaint(hWnd, &ps);
    	hdcMem = GetDC(GetDesktopWindow());

-		GetClientRect(hWnd, &rect);
-		size.cx = rect.right / s_factor;
-		size.cy = rect.bottom / s_factor;
+		GetClientRect(hWnd, &clnt);
+		size.cx = clnt.right / s_factor;
+		size.cy = clnt.bottom / s_factor;

StretchBlt(ps.hdc, 0, 0, size.cx*s_factor,
size.cy*s_factor, hdcMem, s_srcPos.x, s_srcPos.y, size.cx, size.cy,
SRCCOPY);

@@ -114,39 +117,68 @@
    	break;}

case WM_TIMER:
-		if (GetCapture() == hWnd) {
-			RECT rect;
+		if (s_dragging && GetCapture()==hWnd) {
+			RECT clnt, rect;

int width = GetSystemMetrics(SM_CXSCREEN);
    		int height = GetSystemMetrics(SM_CYSCREEN);

-			GetClientRect(hWnd, &rect);
-
    		GetCursorPos(&s_srcPos);

-			s_srcPos.x -= rect.right / s_factor / 2;
-			s_srcPos.y -= rect.bottom / s_factor / 2;
+			GetClientRect(hWnd, &clnt);

+			s_srcPos.x -= clnt.right / s_factor / 2;
+			s_srcPos.y -= clnt.bottom / s_factor / 2;
+
    		if (s_srcPos.x < 0)
    			s_srcPos.x = 0;
-			else if (s_srcPos.x+rect.right/s_factor > width)
-				s_srcPos.x = width -
rect.right/s_factor;
+			else if (s_srcPos.x+clnt.right/s_factor > width)
+				s_srcPos.x = width -
clnt.right/s_factor;

if (s_srcPos.y < 0)
    			s_srcPos.y = 0;
-			else if (s_srcPos.y+rect.bottom/s_factor >
height)
-				s_srcPos.y = height -
rect.bottom/s_factor;
+			else if (s_srcPos.y+clnt.bottom/s_factor >
height)
+				s_srcPos.y = height -
clnt.bottom/s_factor;
+
+			if (memcmp(&rect, &s_lastSrc, sizeof(RECT))) {
+				HDC hdc = GetDC(0);
+
+				if (s_lastSrc.bottom != -1)
+					DrawFocusRect(hdc, &s_lastSrc);
+
+				rect.left = s_srcPos.x - 1;
+				rect.top = s_srcPos.y - 1;
+				rect.right = rect.left +
clnt.right/s_factor + 2;
+				rect.bottom = rect.top +
clnt.bottom/s_factor + 2;
+				DrawFocusRect(hdc, &rect);
+
+				ReleaseDC(0, hdc);
+
+				s_lastSrc = rect;
+			}
    	}

InvalidateRect(hWnd, NULL, FALSE);
+		UpdateWindow(hWnd);
    	break;

case WM_LBUTTONDOWN:
+		s_dragging = TRUE;
    	SetCapture(hWnd);
    	break;

case WM_LBUTTONUP:
-		ReleaseCapture();
+	case WM_CANCELMODE:
+		if (s_dragging) {
+			HDC hdc = GetDC(0);
+			DrawFocusRect(hdc, &s_lastSrc);
+			ReleaseDC(0, hdc);
+
+			s_lastSrc.bottom = -1;
+
+			s_dragging = FALSE;
+			ReleaseCapture();
+		}
    	break;

case WM_DESTROY: