libui/zOLD_windows/checkbox.cpp

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// 7 april 2015
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#include "uipriv_windows.hpp"
struct uiCheckbox {
uiWindowsControl c;
HWND hwnd;
void (*onToggled)(uiCheckbox *, void *);
void *onToggledData;
};
static BOOL onWM_COMMAND(uiControl *cc, HWND hwnd, WORD code, LRESULT *lResult)
{
uiCheckbox *c = uiCheckbox(cc);
WPARAM check;
if (code != BN_CLICKED)
return FALSE;
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// we didn't use BS_AUTOCHECKBOX (http://blogs.msdn.com/b/oldnewthing/archive/2014/05/22/10527522.aspx) so we have to manage the check state ourselves
check = BST_CHECKED;
if (SendMessage(c->hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED)
check = BST_UNCHECKED;
SendMessage(c->hwnd, BM_SETCHECK, check, 0);
(*(c->onToggled))(c, c->onToggledData);
*lResult = 0;
return TRUE;
}
static void uiCheckboxDestroy(uiControl *cc)
{
uiCheckbox *c = uiCheckbox(cc);
uiWindowsUnregisterWM_COMMANDHandler(c->hwnd);
uiWindowsEnsureDestroyWindow(c->hwnd);
uiFreeControl(uiControl(c));
}
uiWindowsControlAllDefaultsExceptDestroy(uiCheckbox)
// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
#define checkboxHeight 10
// from http://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
#define checkboxXFromLeftOfBoxToLeftOfLabel 12
static void uiCheckboxMinimumSize(uiWindowsControl *cc, int *width, int *height)
{
uiCheckbox *c = uiCheckbox(cc);
uiWindowsSizing sizing;
int x, y;
x = checkboxXFromLeftOfBoxToLeftOfLabel;
y = checkboxHeight;
uiWindowsGetSizing(c->hwnd, &sizing);
uiWindowsSizingDlgUnitsToPixels(&sizing, &x, &y);
*width = x + uiWindowsWindowTextWidth(c->hwnd);
*height = y;
}
static void defaultOnToggled(uiCheckbox *c, void *data)
{
// do nothing
}
char *uiCheckboxText(uiCheckbox *c)
{
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return uiWindowsWindowText(c->hwnd);
}
void uiCheckboxSetText(uiCheckbox *c, const char *text)
{
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uiWindowsSetWindowText(c->hwnd, text);
// changing the text might necessitate a change in the checkbox's size
uiWindowsControlMinimumSizeChanged(uiWindowsControl(c));
}
void uiCheckboxOnToggled(uiCheckbox *c, void (*f)(uiCheckbox *, void *), void *data)
{
c->onToggled = f;
c->onToggledData = data;
}
int uiCheckboxChecked(uiCheckbox *c)
{
return SendMessage(c->hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED;
}
void uiCheckboxSetChecked(uiCheckbox *c, int checked)
{
WPARAM check;
check = BST_CHECKED;
if (!checked)
check = BST_UNCHECKED;
SendMessage(c->hwnd, BM_SETCHECK, check, 0);
}
uiCheckbox *uiNewCheckbox(const char *text)
{
uiCheckbox *c;
WCHAR *wtext;
uiWindowsNewControl(uiCheckbox, c);
wtext = toUTF16(text);
c->hwnd = uiWindowsEnsureCreateControlHWND(0,
L"button", wtext,
BS_CHECKBOX | WS_TABSTOP,
hInstance, NULL,
TRUE);
uiprivFree(wtext);
uiWindowsRegisterWM_COMMANDHandler(c->hwnd, onWM_COMMAND, uiControl(c));
uiCheckboxOnToggled(c, defaultOnToggled, NULL);
return c;
}