First Commit

libui-ng/windows/slider.cpp

@@ -0,0 +1,150 @@
+// 20 may 2015
+#include "uipriv_windows.hpp"
+
+struct uiSlider {
+	uiWindowsControl c;
+	HWND hwnd;
+	void (*onChanged)(uiSlider *, void *);
+	void *onChangedData;
+	void (*onReleased)(uiSlider *, void *);
+	void *onReleasedData;
+	HWND hwndToolTip;
+};
+
+static BOOL onWM_HSCROLL(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
+{
+	uiSlider *s = uiSlider(c);
+
+	if (code == TB_ENDTRACK) {
+		(*(s->onReleased))(s, s->onReleasedData);
+	} else {
+		(*(s->onChanged))(s, s->onChangedData);
+	}
+
+	*lResult = 0;
+	return TRUE;
+}
+
+static void uiSliderDestroy(uiControl *c)
+{
+	uiSlider *s = uiSlider(c);
+
+	// ensure TRACKBAR_CLASSW takes care of destroying the tooltip
+	uiSliderSetHasToolTip(s, 1);
+
+	uiWindowsUnregisterWM_HSCROLLHandler(s->hwnd);
+	uiWindowsEnsureDestroyWindow(s->hwnd);
+	uiFreeControl(uiControl(s));
+}
+
+uiWindowsControlAllDefaultsExceptDestroy(uiSlider);
+
+// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+#define sliderWidth 107 /* this is actually the shorter progress bar width, but Microsoft doesn't indicate a width */
+#define sliderHeight 15
+
+static void uiSliderMinimumSize(uiWindowsControl *c, int *width, int *height)
+{
+	uiSlider *s = uiSlider(c);
+	uiWindowsSizing sizing;
+	int x, y;
+
+	x = sliderWidth;
+	y = sliderHeight;
+	uiWindowsGetSizing(s->hwnd, &sizing);
+	uiWindowsSizingDlgUnitsToPixels(&sizing, &x, &y);
+	*width = x;
+	*height = y;
+}
+
+int uiSliderHasToolTip(uiSlider *s)
+{
+	return ((HWND) SendMessage(s->hwnd, TBM_GETTOOLTIPS, 0, 0) == s->hwndToolTip);
+}
+
+void uiSliderSetHasToolTip(uiSlider *s, int hasToolTip)
+{
+	if (hasToolTip)
+		SendMessage(s->hwnd, TBM_SETTOOLTIPS, (WPARAM) s->hwndToolTip, 0);
+	else
+		SendMessage(s->hwnd, TBM_SETTOOLTIPS, 0, 0);
+}
+
+static void defaultOnChanged(uiSlider *s, void *data)
+{
+	// do nothing
+}
+
+static void defaultOnReleased(uiSlider *s, void *data)
+{
+	// do nothing
+}
+
+int uiSliderValue(uiSlider *s)
+{
+	return SendMessageW(s->hwnd, TBM_GETPOS, 0, 0);
+}
+
+void uiSliderSetValue(uiSlider *s, int value)
+{
+	// don't use TBM_SETPOSNOTIFY; that triggers an event
+	SendMessageW(s->hwnd, TBM_SETPOS, (WPARAM) TRUE, (LPARAM) value);
+}
+
+void uiSliderOnChanged(uiSlider *s, void (*f)(uiSlider *, void *), void *data)
+{
+	s->onChanged = f;
+	s->onChangedData = data;
+}
+
+void uiSliderOnReleased(uiSlider *s, void (*f)(uiSlider *, void *), void *data)
+{
+	s->onReleased = f;
+	s->onReleasedData = data;
+}
+
+void uiSliderSetRange(uiSlider *s, int min, int max)
+{
+	int temp;
+
+	if (min >= max) {
+		temp = min;
+		min = max;
+		max = temp;
+	}
+
+	SendMessageW(s->hwnd, TBM_SETRANGEMIN, (WPARAM) TRUE, (LPARAM) min);
+	SendMessageW(s->hwnd, TBM_SETRANGEMAX, (WPARAM) TRUE, (LPARAM) max);
+}
+
+uiSlider *uiNewSlider(int min, int max)
+{
+	uiSlider *s;
+	int temp;
+
+	if (min >= max) {
+		temp = min;
+		min = max;
+		max = temp;
+	}
+
+	uiWindowsNewControl(uiSlider, s);
+
+	s->hwnd = uiWindowsEnsureCreateControlHWND(0,
+		TRACKBAR_CLASSW, L"",
+		TBS_HORZ | TBS_TOOLTIPS | TBS_TRANSPARENTBKGND | WS_TABSTOP,
+		hInstance, NULL,
+		TRUE);
+
+	uiWindowsRegisterWM_HSCROLLHandler(s->hwnd, onWM_HSCROLL, uiControl(s));
+	uiSliderOnChanged(s, defaultOnChanged, NULL);
+	uiSliderOnReleased(s, defaultOnReleased, NULL);
+
+	SendMessageW(s->hwnd, TBM_SETRANGEMIN, (WPARAM) TRUE, (LPARAM) min);
+	SendMessageW(s->hwnd, TBM_SETRANGEMAX, (WPARAM) TRUE, (LPARAM) max);
+	SendMessageW(s->hwnd, TBM_SETPOS, (WPARAM) TRUE, (LPARAM) min);
+
+	s->hwndToolTip = (HWND) SendMessage(s->hwnd, TBM_GETTOOLTIPS, 0, 0);
+
+	return s;
+}