First Commit

libui-ng/windows/group.cpp

@@ -0,0 +1,217 @@
+// 16 may 2015
+#include "uipriv_windows.hpp"
+
+struct uiGroup {
+	uiWindowsControl c;
+	HWND hwnd;
+	struct uiControl *child;
+	int margined;
+};
+
+// from https://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+#define groupXMargin 6
+#define groupYMarginTop 11 /* note this value /includes/ the groupbox label */
+#define groupYMarginBottom 7
+
+// unfortunately because the client area of a groupbox includes the frame and caption text, we have to apply some margins ourselves, even if we don't want "any"
+// these were deduced by hand based on the standard DLU conversions; the X and Y top margins are the width and height, respectively, of one character cell
+// they can be fine-tuned later
+#define groupUnmarginedXMargin 4
+#define groupUnmarginedYMarginTop 8
+#define groupUnmarginedYMarginBottom 3
+
+static void groupMargins(uiGroup *g, int *mx, int *mtop, int *mbottom)
+{
+	uiWindowsSizing sizing;
+
+	*mx = groupUnmarginedXMargin;
+	*mtop = groupUnmarginedYMarginTop;
+	*mbottom = groupUnmarginedYMarginBottom;
+	if (g->margined) {
+		*mx = groupXMargin;
+		*mtop = groupYMarginTop;
+		*mbottom = groupYMarginBottom;
+	}
+	uiWindowsGetSizing(g->hwnd, &sizing);
+	uiWindowsSizingDlgUnitsToPixels(&sizing, mx, mtop);
+	uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, mbottom);
+}
+
+static void groupRelayout(uiGroup *g)
+{
+	RECT r;
+	int mx, mtop, mbottom;
+
+	if (g->child == NULL)
+		return;
+	uiWindowsEnsureGetClientRect(g->hwnd, &r);
+	groupMargins(g, &mx, &mtop, &mbottom);
+	r.left += mx;
+	r.top += mtop;
+	r.right -= mx;
+	r.bottom -= mbottom;
+	uiWindowsEnsureMoveWindowDuringResize((HWND) uiControlHandle(g->child), r.left, r.top, r.right - r.left, r.bottom - r.top);
+}
+
+static void uiGroupDestroy(uiControl *c)
+{
+	uiGroup *g = uiGroup(c);
+
+	if (g->child != NULL) {
+		uiControlSetParent(g->child, NULL);
+		uiControlDestroy(g->child);
+	}
+	uiWindowsEnsureDestroyWindow(g->hwnd);
+	uiFreeControl(uiControl(g));
+}
+
+uiWindowsControlDefaultHandle(uiGroup)
+uiWindowsControlDefaultParent(uiGroup)
+uiWindowsControlDefaultSetParent(uiGroup)
+uiWindowsControlDefaultToplevel(uiGroup)
+uiWindowsControlDefaultVisible(uiGroup)
+uiWindowsControlDefaultShow(uiGroup)
+uiWindowsControlDefaultHide(uiGroup)
+uiWindowsControlDefaultEnabled(uiGroup)
+uiWindowsControlDefaultEnable(uiGroup)
+uiWindowsControlDefaultDisable(uiGroup)
+
+static void uiGroupSyncEnableState(uiWindowsControl *c, int enabled)
+{
+	uiGroup *g = uiGroup(c);
+
+	if (uiWindowsShouldStopSyncEnableState(uiWindowsControl(g), enabled))
+		return;
+	EnableWindow(g->hwnd, enabled);
+	if (g->child != NULL)
+		uiWindowsControlSyncEnableState(uiWindowsControl(g->child), enabled);
+}
+
+uiWindowsControlDefaultSetParentHWND(uiGroup)
+
+static void uiGroupMinimumSize(uiWindowsControl *c, int *width, int *height)
+{
+	uiGroup *g = uiGroup(c);
+	int mx, mtop, mbottom;
+	int labelWidth;
+
+	*width = 0;
+	*height = 0;
+	if (g->child != NULL)
+		uiWindowsControlMinimumSize(uiWindowsControl(g->child), width, height);
+	labelWidth = uiWindowsWindowTextWidth(g->hwnd);
+	if (*width < labelWidth)		// don't clip the label; it doesn't ellipsize
+		*width = labelWidth;
+	groupMargins(g, &mx, &mtop, &mbottom);
+	*width += 2 * mx;
+	*height += mtop + mbottom;
+}
+
+static void uiGroupMinimumSizeChanged(uiWindowsControl *c)
+{
+	uiGroup *g = uiGroup(c);
+
+	if (uiWindowsControlTooSmall(uiWindowsControl(g))) {
+		uiWindowsControlContinueMinimumSizeChanged(uiWindowsControl(g));
+		return;
+	}
+	groupRelayout(g);
+}
+
+uiWindowsControlDefaultLayoutRect(uiGroup)
+uiWindowsControlDefaultAssignControlIDZOrder(uiGroup)
+
+static void uiGroupChildVisibilityChanged(uiWindowsControl *c)
+{
+	// TODO eliminate the redundancy
+	uiWindowsControlMinimumSizeChanged(c);
+}
+
+char *uiGroupTitle(uiGroup *g)
+{
+	return uiWindowsWindowText(g->hwnd);
+}
+
+void uiGroupSetTitle(uiGroup *g, const char *text)
+{
+	uiWindowsSetWindowText(g->hwnd, text);
+	// changing the text might necessitate a change in the groupbox's size
+	uiWindowsControlMinimumSizeChanged(uiWindowsControl(g));
+}
+
+void uiGroupSetChild(uiGroup *g, uiControl *child)
+{
+	if (g->child != NULL) {
+		uiControlSetParent(g->child, NULL);
+		uiWindowsControlSetParentHWND(uiWindowsControl(g->child), NULL);
+	}
+	g->child = child;
+	if (g->child != NULL) {
+		uiControlSetParent(g->child, uiControl(g));
+		uiWindowsControlSetParentHWND(uiWindowsControl(g->child), g->hwnd);
+		uiWindowsControlAssignSoleControlIDZOrder(uiWindowsControl(g->child));
+		uiWindowsControlMinimumSizeChanged(uiWindowsControl(g));
+	}
+}
+
+int uiGroupMargined(uiGroup *g)
+{
+	return g->margined;
+}
+
+void uiGroupSetMargined(uiGroup *g, int margined)
+{
+	g->margined = margined;
+	uiWindowsControlMinimumSizeChanged(uiWindowsControl(g));
+}
+
+static LRESULT CALLBACK groupSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
+{
+	uiGroup *g = uiGroup(dwRefData);
+	WINDOWPOS *wp = (WINDOWPOS *) lParam;
+	MINMAXINFO *mmi = (MINMAXINFO *) lParam;
+	int minwid, minht;
+	LRESULT lResult;
+
+	if (handleParentMessages(hwnd, uMsg, wParam, lParam, &lResult) != FALSE)
+		return lResult;
+	switch (uMsg) {
+	case WM_WINDOWPOSCHANGED:
+		if ((wp->flags & SWP_NOSIZE) != 0)
+			break;
+		groupRelayout(g);
+		return 0;
+	case WM_GETMINMAXINFO:
+		lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
+		uiWindowsControlMinimumSize(uiWindowsControl(g), &minwid, &minht);
+		mmi->ptMinTrackSize.x = minwid;
+		mmi->ptMinTrackSize.y = minht;
+		return lResult;
+	case WM_NCDESTROY:
+		if (RemoveWindowSubclass(hwnd, groupSubProc, uIdSubclass) == FALSE)
+			logLastError(L"error removing groupbox subclass");
+		break;
+	}
+	return DefSubclassProc(hwnd, uMsg, wParam, lParam);
+}
+
+uiGroup *uiNewGroup(const char *text)
+{
+	uiGroup *g;
+	WCHAR *wtext;
+
+	uiWindowsNewControl(uiGroup, g);
+
+	wtext = toUTF16(text);
+	g->hwnd = uiWindowsEnsureCreateControlHWND(WS_EX_CONTROLPARENT,
+		L"button", wtext,
+		BS_GROUPBOX,
+		hInstance, NULL,
+		TRUE);
+	uiprivFree(wtext);
+
+	if (SetWindowSubclass(g->hwnd, groupSubProc, 0, (DWORD_PTR) g) == FALSE)
+		logLastError(L"error subclassing groupbox to handle parent messages");
+
+	return g;
+}