Improve const-correctness in betawidget.

git-svn-id: svn+ssh://svn.gna.org/svn/warzone/trunk@5791 4a71c877-e1ca-e34f-864e-861f7616d084

lib/betawidget/widget.c

@@ -97,7 +97,7 @@ static bool widgetHasMouse(widget *self, point location)
  * @param id    The id of the desired event handler.
  * @return A pointer to the event handler, or NULL if id is invalid.
  */
-static eventTableEntry *widgetGetEventHandlerById(widget *self, int id)
+static eventTableEntry *widgetGetEventHandlerById(const widget *self, int id)
 {
 	int i;
 	eventTableEntry *entry = NULL;
@@ -118,7 +118,7 @@ static eventTableEntry *widgetGetEventHandlerById(widget *self, int id)
 	return entry;
 }
 
-bool widgetIsA(widget *self, const classInfo *instanceOf)
+bool widgetIsA(const widget *self, const classInfo *instanceOf)
 {
 	const classInfo *widgetClass;
 	
@@ -332,7 +332,7 @@ void widgetDrawMask(widget *self)
 	widgetDoDrawMask(self);
 }
 
-point widgetAbsolutePosition(widget *self)
+point widgetAbsolutePosition(const widget *self)
 {
 	// Get our own offset
 	point pos = self->offset;
@@ -346,7 +346,7 @@ point widgetAbsolutePosition(widget *self)
 	return pos;
 }
 
-rect widgetAbsoluteBounds(widget *self)
+rect widgetAbsoluteBounds(const widget *self)
 {
 	// Get our position
 	const point p = widgetAbsolutePosition(self);
@@ -405,7 +405,7 @@ widget *widgetFindById(widget *self, const char *id)
 	return NULL;
 }
 
-void *widgetGetEventHandlerUserData(widget *self, int id)
+void *widgetGetEventHandlerUserData(const widget *self, int id)
 {
 	eventTableEntry *entry = widgetGetEventHandlerById(self, id);
 	
@@ -1035,7 +1035,7 @@ bool widgetHandleEventImpl(widget *self, event *evt)
 	return true;
 }
 
-bool widgetPointMasked(widget *self, point loc)
+bool widgetPointMasked(const widget *self, point loc)
 {
 	/*
 	 * The format of the mask is CAIRO_FORMAT_A1, where:

lib/betawidget/widget.h

@@ -402,7 +402,7 @@ void widgetCompositeImpl(widget *self);
  * @param instanceOf	The class we are interested in.
  * @return True if it is legal to cast, false otherwise.
  */
-bool widgetIsA(widget *self, const classInfo *instanceOf);
+bool widgetIsA(const widget *self, const classInfo *instanceOf);
 
 /*
  * Public static, implementation defined methods
@@ -468,7 +468,7 @@ widget *widgetFindById(widget *self, const char *id);
  * @param self  The widget to get the position of.
  * @return The absolute position of self.
  */
-point widgetAbsolutePosition(widget *self);
+point widgetAbsolutePosition(const widget *self);
 
 /**
  * Returns the absolute bounding rectangle of the widget.
@@ -476,7 +476,7 @@ point widgetAbsolutePosition(widget *self);
  * @param self  The widget to get the bounds of.
  * @return The absolute bounds of self.
  */
-rect widgetAbsoluteBounds(widget *self);
+rect widgetAbsoluteBounds(const widget *self);
 
 /**
  * Transverses up the hierarchy until it finds parent-less widget (known as
@@ -562,7 +562,7 @@ void widgetRemoveEventHandler(widget *self, int id);
  * @returm The user-data for the event handler, or NULL if the eventId is
  *         invalid.
  */
-void *widgetGetEventHandlerUserData(widget *self, int id);
+void *widgetGetEventHandlerUserData(const widget *self, int id);
 
 /**
  * Sets the user-data for the event handler with an id of id registered to self
@@ -744,6 +744,6 @@ bool widgetFireTimerCallbacks(widget *self, event *evt);
  * @param loc   The point (x,y) to check the mask status of.
  * @return true if loc is masked; false otherwise;
  */
-bool widgetPointMasked(widget *self, point loc);
+bool widgetPointMasked(const widget *self, point loc);
 
 #endif /*WIDGET_H_*/