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// 7 april 2015
#include "uipriv_windows.hpp"
struct uiButton {
uiWindowsControl c;
HWND hwnd;
void (*onClicked)(uiButton *, void *);
void *onClickedData;
SIZE idealSize;
int idealSizeCached;
};
static BOOL onWM_COMMAND(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
{
uiButton *b = uiButton(c);
if (code != BN_CLICKED)
return FALSE;
(*(b->onClicked))(b, b->onClickedData);
*lResult = 0;
return TRUE;
}
static void uiButtonDestroy(uiControl *c)
{
uiButton *b = uiButton(c);
uiWindowsUnregisterWM_COMMANDHandler(b->hwnd);
uiWindowsEnsureDestroyWindow(b->hwnd);
uiFreeControl(uiControl(b));
}
uiWindowsControlAllDefaultsExceptDestroy(uiButton)
// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
#define buttonHeight 14
#define buttonMinWidth 64
static void uiButtonMinimumSize(uiWindowsControl *c, int *width, int *height)
{
uiButton *b = uiButton(c);
SIZE size;
uiWindowsSizing sizing;
int y;
if (b->idealSizeCached)
{
*width = b->idealSize.cx;
*height = b->idealSize.cy;
return;
}
// try the comctl32 version 6 way
size.cx = 0; // explicitly ask for ideal size
size.cy = 0;
if (SendMessageW(b->hwnd, BCM_GETIDEALSIZE, 0, (LPARAM) (&size)) != FALSE) {
*width = size.cx;
if (*width < buttonMinWidth) *width = buttonMinWidth;
*height = size.cy;
b->idealSize.cx = *width;
b->idealSize.cy = *height;
b->idealSizeCached = true;
return;
}
// that didn't work; fall back to using Microsoft's metrics
// Microsoft says to use a fixed width for all buttons; this isn't good enough
// use the text width instead, with some edge padding
*width = uiWindowsWindowTextWidth(b->hwnd) + (2 * GetSystemMetrics(SM_CXEDGE));
if (*width < buttonMinWidth) *width = buttonMinWidth;
y = buttonHeight;
uiWindowsGetSizing(b->hwnd, &sizing);
uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, &y);
*height = y;
b->idealSize.cx = *width;
b->idealSize.cy = *height;
b->idealSizeCached = true;
}
static void defaultOnClicked(uiButton *b, void *data)
{
// do nothing
}
char *uiButtonText(uiButton *b)
{
return uiWindowsWindowText(b->hwnd);
}
void uiButtonSetText(uiButton *b, const char *text)
{
uiWindowsSetWindowText(b->hwnd, text);
b->idealSizeCached = 0;
// changing the text might necessitate a change in the button's size
uiWindowsControlMinimumSizeChanged(uiWindowsControl(b));
}
void uiButtonOnClicked(uiButton *b, void (*f)(uiButton *, void *), void *data)
{
b->onClicked = f;
b->onClickedData = data;
}
uiButton *uiNewButton(const char *text)
{
uiButton *b;
WCHAR *wtext;
uiWindowsNewControl(uiButton, b);
wtext = toUTF16(text);
b->hwnd = uiWindowsEnsureCreateControlHWND(0,
L"button", wtext,
BS_PUSHBUTTON | WS_TABSTOP,
hInstance, NULL,
TRUE);
uiFree(wtext);
uiWindowsRegisterWM_COMMANDHandler(b->hwnd, onWM_COMMAND, uiControl(b));
uiButtonOnClicked(b, defaultOnClicked, NULL);
b->idealSizeCached = 0;
return b;
}
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