gecko-dev/widget/gtk2/nsLookAndFeel.h

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* The Original Code is mozilla.org code.
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#ifndef __nsLookAndFeel
#define __nsLookAndFeel
#include "nsXPLookAndFeel.h"
#include "nsCOMPtr.h"
#include <gtk/gtk.h>
class nsLookAndFeel: public nsXPLookAndFeel {
public:
nsLookAndFeel();
virtual ~nsLookAndFeel();
virtual nsresult NativeGetColor(ColorID aID, nscolor &aResult);
virtual nsresult GetIntImpl(IntID aID, PRInt32 &aResult);
virtual nsresult GetFloatImpl(FloatID aID, float &aResult);
virtual void RefreshImpl();
virtual PRUnichar GetPasswordCharacterImpl();
virtual bool GetEchoPasswordImpl();
protected:
GtkStyle *mStyle;
// Cached colors, we have to create a dummy widget to actually
// get the style
static nscolor sInfoBackground;
static nscolor sInfoText;
static nscolor sMenuBackground;
static nscolor sMenuBarText;
static nscolor sMenuBarHoverText;
static nscolor sMenuText;
static nscolor sMenuHover;
static nscolor sMenuHoverText;
static nscolor sButtonBackground;
static nscolor sButtonText;
static nscolor sButtonOuterLightBorder;
static nscolor sButtonInnerDarkBorder;
static nscolor sOddCellBackground;
static nscolor sNativeHyperLinkText;
static nscolor sComboBoxText;
static nscolor sComboBoxBackground;
static PRUnichar sInvisibleCharacter;
static float sCaretRatio;
static bool sMenuSupportsDrag;
static void InitLookAndFeel();
void InitWidget() {
NS_ASSERTION(!mStyle, "already initialized");
// GtkInvisibles come with a refcount that is not floating
// (since their initialization code calls g_object_ref_sink) and
// their destroy code releases that reference (which means they
// have to be explicitly destroyed, since calling unref enough
// to cause destruction would lead to *another* unref).
// However, this combination means that it's actually still ok
// to use the normal pattern, which is to g_object_ref_sink
// after construction, and then destroy *and* unref when we're
// done. (Though we could skip the g_object_ref_sink and the
// corresponding g_object_unref, but that's particular to
// GtkInvisibles and GtkWindows.)
GtkWidget *widget = gtk_invisible_new();
g_object_ref_sink(widget); // effectively g_object_ref (see above)
gtk_widget_ensure_style(widget);
mStyle = gtk_style_copy(gtk_widget_get_style(widget));
gtk_widget_destroy(widget);
g_object_unref(widget);
}
};
#endif