libui/windows/entry.cpp

// 8 april 2015
#include "uipriv_windows.hpp"

struct uiEntry {
	uiWindowsControl c;
	HWND hwnd;
	void (*onChanged)(uiEntry *, void *);
	void *onChangedData;
	BOOL inhibitChanged;
};

uiWindowsDefineControlWithOnDestroy(
	uiEntry,								// type name
	uiWindowsUnregisterWM_COMMANDHandler(me->hwnd);	// on destroy
)

static BOOL onWM_COMMAND(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
{
	uiEntry *e = uiEntry(c);

	if (code != EN_CHANGE)
		return FALSE;
	if (e->inhibitChanged)
		return FALSE;
	(*(e->onChanged))(e, e->onChangedData);
	*lResult = 0;
	return TRUE;
}

// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
#define entryWidth 107 /* this is actually the shorter progress bar width, but Microsoft only indicates as wide as necessary */
#define entryHeight 14

static void minimumSize(uiWindowsControl *c, uiWindowsSizing *d, intmax_t *width, intmax_t *height)
{
	*width = uiWindowsDlgUnitsToX(entryWidth, d->BaseX);
	*height = uiWindowsDlgUnitsToY(entryHeight, d->BaseY);
}

static void defaultOnChanged(uiEntry *e, void *data)
{
	// do nothing
}

char *uiEntryText(uiEntry *e)
{
	return uiWindowsWindowText(e->hwnd);
}

void uiEntrySetText(uiEntry *e, const char *text)
{
	// doing this raises an EN_CHANGED
	e->inhibitChanged = TRUE;
	uiWindowsSetWindowText(e->hwnd, text);
	e->inhibitChanged = FALSE;
	// don't queue the control for resize; entry sizes are independent of their contents
}

void uiEntryOnChanged(uiEntry *e, void (*f)(uiEntry *, void *), void *data)
{
	e->onChanged = f;
	e->onChangedData = data;
}

int uiEntryReadOnly(uiEntry *e)
{
	return (getStyle(e->hwnd) & ES_READONLY) != 0;
}

void uiEntrySetReadOnly(uiEntry *e, int readonly)
{
	WPARAM ro;

	ro = (WPARAM) FALSE;
	if (readonly)
		ro = (WPARAM) TRUE;
	if (SendMessage(e->hwnd, EM_SETREADONLY, ro, 0) == 0)
		logLastError(L"error making uiEntry read-only");
}

uiEntry *uiNewEntry(void)
{
	uiEntry *e;

	e = (uiEntry *) uiNewControl(uiEntry);

	e->hwnd = uiWindowsEnsureCreateControlHWND(WS_EX_CLIENTEDGE,
		L"edit", L"",
		ES_AUTOHSCROLL | ES_LEFT | ES_NOHIDESEL | WS_TABSTOP,
		hInstance, NULL,
		TRUE);

	uiWindowsRegisterWM_COMMANDHandler(e->hwnd, onWM_COMMAND, uiControl(e));
	uiEntryOnChanged(e, defaultOnChanged, NULL);

	uiWindowsFinishNewControl(e, uiEntry);

	return e;
}