First Commit

libui-ng/windows/area.cpp

@@ -0,0 +1,206 @@
+// 8 september 2015
+#include "uipriv_windows.hpp"
+#include "area.hpp"
+
+// TODO handle WM_DESTROY/WM_NCDESTROY
+// TODO same for other Direct2D stuff
+static LRESULT CALLBACK areaWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+	uiArea *a;
+	CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
+	RECT client;
+	WINDOWPOS *wp = (WINDOWPOS *) lParam;
+	LRESULT lResult;
+
+	a = (uiArea *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
+	if (a == NULL) {
+		if (uMsg == WM_CREATE) {
+			a = (uiArea *) (cs->lpCreateParams);
+			// assign a->hwnd here so we can use it immediately
+			a->hwnd = hwnd;
+			SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR) a);
+		}
+		// fall through to DefWindowProcW() anyway
+		return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+	}
+
+	// always recreate the render target if necessary
+	if (a->rt == NULL)
+		a->rt = makeHWNDRenderTarget(a->hwnd);
+
+	if (areaDoDraw(a, uMsg, wParam, lParam, &lResult) != FALSE)
+		return lResult;
+
+	if (uMsg == WM_WINDOWPOSCHANGED) {
+		if ((wp->flags & SWP_NOSIZE) != 0)
+			return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+		uiWindowsEnsureGetClientRect(a->hwnd, &client);
+		areaDrawOnResize(a, &client);
+		areaScrollOnResize(a, &client);
+		return 0;
+	}
+
+	if (areaDoScroll(a, uMsg, wParam, lParam, &lResult) != FALSE)
+		return lResult;
+	if (areaDoEvents(a, uMsg, wParam, lParam, &lResult) != FALSE)
+		return lResult;
+
+	// nothing done
+	return DefWindowProc(hwnd, uMsg, wParam, lParam);
+}
+
+// control implementation
+
+uiWindowsControlAllDefaults(uiArea)
+
+static void uiAreaMinimumSize(uiWindowsControl *c, int *width, int *height)
+{
+	// TODO
+	*width = 0;
+	*height = 0;
+}
+
+ATOM registerAreaClass(HICON hDefaultIcon, HCURSOR hDefaultCursor)
+{
+	WNDCLASSW wc;
+
+	ZeroMemory(&wc, sizeof (WNDCLASSW));
+	wc.lpszClassName = areaClass;
+	wc.lpfnWndProc = areaWndProc;
+	wc.hInstance = hInstance;
+	wc.hIcon = hDefaultIcon;
+	wc.hCursor = hDefaultCursor;
+	wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
+	// this is just to be safe; see the InvalidateRect() call in the WM_WINDOWPOSCHANGED handler for more details
+	wc.style = CS_HREDRAW | CS_VREDRAW;
+	return RegisterClassW(&wc);
+}
+
+void unregisterArea(void)
+{
+	if (UnregisterClassW(areaClass, hInstance) == 0)
+		logLastError(L"error unregistering uiArea window class");
+}
+
+void uiAreaSetSize(uiArea *a, int width, int height)
+{
+	a->scrollWidth = width;
+	a->scrollHeight = height;
+	areaUpdateScroll(a);
+}
+
+void uiAreaQueueRedrawAll(uiArea *a)
+{
+	// don't erase the background; we do that ourselves in doPaint()
+	invalidateRect(a->hwnd, NULL, FALSE);
+}
+
+void uiAreaScrollTo(uiArea *a, double x, double y, double width, double height)
+{
+	// TODO
+}
+
+void uiAreaBeginUserWindowMove(uiArea *a)
+{
+	HWND toplevel;
+
+	// TODO restrict execution
+	ReleaseCapture();		// TODO use properly and reset internal data structures
+	toplevel = parentToplevel(a->hwnd);
+	if (toplevel == NULL) {
+		// TODO
+		return;
+	}
+	// see http://stackoverflow.com/questions/40249940/how-do-i-initiate-a-user-mouse-driven-move-or-resize-for-custom-window-borders-o#40250654
+	SendMessageW(toplevel, WM_SYSCOMMAND,
+		SC_MOVE | 2, 0);
+}
+
+void uiAreaBeginUserWindowResize(uiArea *a, uiWindowResizeEdge edge)
+{
+	HWND toplevel;
+	WPARAM wParam;
+
+	// TODO restrict execution
+	ReleaseCapture();		// TODO use properly and reset internal data structures
+	toplevel = parentToplevel(a->hwnd);
+	if (toplevel == NULL) {
+		// TODO
+		return;
+	}
+	// see http://stackoverflow.com/questions/40249940/how-do-i-initiate-a-user-mouse-driven-move-or-resize-for-custom-window-borders-o#40250654
+	wParam = SC_SIZE;
+	switch (edge) {
+	case uiWindowResizeEdgeLeft:
+		wParam |= 1;
+		break;
+	case uiWindowResizeEdgeTop:
+		wParam |= 3;
+		break;
+	case uiWindowResizeEdgeRight:
+		wParam |= 2;
+		break;
+	case uiWindowResizeEdgeBottom:
+		wParam |= 6;
+		break;
+	case uiWindowResizeEdgeTopLeft:
+		wParam |= 4;
+		break;
+	case uiWindowResizeEdgeTopRight:
+		wParam |= 5;
+		break;
+	case uiWindowResizeEdgeBottomLeft:
+		wParam |= 7;
+		break;
+	case uiWindowResizeEdgeBottomRight:
+		wParam |= 8;
+		break;
+	}
+	SendMessageW(toplevel, WM_SYSCOMMAND,
+		wParam, 0);
+}
+
+uiArea *uiNewArea(uiAreaHandler *ah)
+{
+	uiArea *a;
+
+	uiWindowsNewControl(uiArea, a);
+
+	a->ah = ah;
+	a->scrolling = FALSE;
+	uiprivClickCounterReset(&(a->cc));
+
+	// a->hwnd is assigned in areaWndProc()
+	uiWindowsEnsureCreateControlHWND(0,
+		areaClass, L"",
+		0,
+		hInstance, a,
+		FALSE);
+
+	return a;
+}
+
+uiArea *uiNewScrollingArea(uiAreaHandler *ah, int width, int height)
+{
+	uiArea *a;
+
+	uiWindowsNewControl(uiArea, a);
+
+	a->ah = ah;
+	a->scrolling = TRUE;
+	a->scrollWidth = width;
+	a->scrollHeight = height;
+	uiprivClickCounterReset(&(a->cc));
+
+	// a->hwnd is assigned in areaWndProc()
+	uiWindowsEnsureCreateControlHWND(0,
+		areaClass, L"",
+		WS_HSCROLL | WS_VSCROLL,
+		hInstance, a,
+		FALSE);
+
+	// set initial scrolling parameters
+	areaUpdateScroll(a);
+
+	return a;
+}