108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
// 20 may 2015
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#include "uipriv_windows.h"
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struct slider {
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uiSlider s;
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HWND hwnd;
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void (*baseResize)(uiControl *, intmax_t, intmax_t, intmax_t, intmax_t, uiSizing *);
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void (*onChanged)(uiSlider *, void *);
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void *onChangedData;
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void (*baseCommitDestroy)(uiControl *);
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};
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uiDefineControlType(uiSlider, uiTypeSlider, struct slider)
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static BOOL onWM_HSCROLL(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
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{
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struct slider *s = (struct slider *) c;
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(*(s->onChanged))(uiSlider(s), s->onChangedData);
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*lResult = 0;
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return TRUE;
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}
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static void sliderCommitDestroy(uiControl *c)
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{
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struct slider *s = (struct slider *) c;
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uiWindowsUnregisterWM_HSCROLLHandler(s->hwnd);
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(*(s->baseCommitDestroy))(uiControl(s));
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}
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static uintptr_t sliderHandle(uiControl *c)
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{
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struct slider *s = (struct slider *) c;
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return (uintptr_t) (s->hwnd);
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}
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// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
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#define sliderWidth 107 /* this is actually the shorter progress bar width, but Microsoft doesn't indicate a width */
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#define sliderHeight 15
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static void sliderPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_t *height)
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{
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*width = uiWindowsDlgUnitsToX(sliderWidth, d->Sys->BaseX);
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*height = uiWindowsDlgUnitsToY(sliderHeight, d->Sys->BaseY);
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}
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static void defaultOnChanged(uiSlider *s, void *data)
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{
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// do nothing
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}
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static intmax_t sliderValue(uiSlider *ss)
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{
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struct slider *s = (struct slider *) ss;
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return (intmax_t) SendMessageW(s->hwnd, TBM_GETPOS, 0, 0);
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}
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static void sliderSetValue(uiSlider *ss, intmax_t value)
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{
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struct slider *s = (struct slider *) ss;
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// don't use TBM_SETPOSNOTIFY; that triggers an event
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SendMessageW(s->hwnd, TBM_SETPOS, (WPARAM) TRUE, (LPARAM) value);
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}
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static void sliderOnChanged(uiSlider *ss, void (*f)(uiSlider *, void *), void *data)
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{
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struct slider *s = (struct slider *) ss;
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s->onChanged = f;
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s->onChangedData = data;
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}
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uiSlider *uiNewSlider(intmax_t min, intmax_t max)
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{
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struct slider *s;
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s = (struct slider *) uiWindowsNewSingleHWNDControl(uiTypeSlider());
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s->hwnd = uiWindowsUtilCreateControlHWND(0,
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TRACKBAR_CLASSW, L"",
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TBS_HORZ | TBS_TOOLTIPS | TBS_TRANSPARENTBKGND | WS_TABSTOP,
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hInstance, NULL,
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TRUE);
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uiWindowsRegisterWM_HSCROLLHandler(s->hwnd, onWM_HSCROLL, uiControl(s));
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SendMessageW(s->hwnd, TBM_SETRANGEMIN, (WPARAM) TRUE, (LPARAM) min);
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SendMessageW(s->hwnd, TBM_SETRANGEMAX, (WPARAM) TRUE, (LPARAM) max);
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SendMessageW(s->hwnd, TBM_SETPOS, (WPARAM) TRUE, (LPARAM) min);
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s->onChanged = defaultOnChanged;
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uiControl(s)->Handle = sliderHandle;
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uiControl(s)->PreferredSize = sliderPreferredSize;
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s->baseCommitDestroy = uiControl(s)->CommitDestroy;
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uiControl(s)->CommitDestroy = sliderCommitDestroy;
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uiSlider(s)->Value = sliderValue;
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uiSlider(s)->SetValue = sliderSetValue;
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uiSlider(s)->OnChanged = sliderOnChanged;
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return uiSlider(s);
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}
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