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#ifndef __DW_FLTKVIEWPORT_HH__
#define __DW_FLTKVIEWPORT_HH__
#include <fltk/Group.h>
#include <fltk/Scrollbar.h>
#include "core.hh"
#include "fltkcore.hh"
#include "fltkviewbase.hh"
namespace dw {
namespace fltk {
class FltkViewport: public FltkWidgetView
{
public:
enum GadgetOrientation { GADGET_VERTICAL, GADGET_HORIZONTAL };
private:
enum { SCROLLBAR_THICKNESS = 15 };
int scrollX, scrollY;
int scrollDX, scrollDY;
int dragScrolling, dragX, dragY;
::fltk::Scrollbar *vscrollbar, *hscrollbar;
GadgetOrientation gadgetOrientation[4];
container::typed::List <object::TypedPointer < ::fltk::Widget> > *gadgets;
void adjustScrollbarsAndGadgetsAllocation ();
void adjustScrollbarValues ();
void hscrollbarChanged ();
void vscrollbarChanged ();
void positionChanged ();
static void hscrollbarCallback (Widget *hscrollbar, void *viewportPtr);
static void vscrollbarCallback (Widget *vscrollbar, void *viewportPtr);
void updateCanvasWidgets (int oldScrollX, int oldScrollY);
static void draw_area (void *data, const Rectangle& cr);
protected:
int translateViewXToCanvasX (int x);
int translateViewYToCanvasY (int y);
int translateCanvasXToViewX (int x);
int translateCanvasYToViewY (int y);
public:
FltkViewport (int x, int y, int w, int h, const char *label = 0);
~FltkViewport ();
void layout();
void draw ();
int handle (int event);
void setCanvasSize (int width, int ascent, int descent);
bool usesViewport ();
int getHScrollbarThickness ();
int getVScrollbarThickness ();
void scroll(int dx, int dy);
void scrollTo (int x, int y);
void setViewportSize (int width, int height,
int hScrollbarThickness, int vScrollbarThickness);
void setScrollStep(int step);
void setGadgetOrientation (bool hscrollbarVisible, bool vscrollbarVisible,
GadgetOrientation gadgetOrientation);
void addGadget (::fltk::Widget *gadget);
};
} // namespace fltk
} // namespace dw
#endif // __DW_FLTKVIEWPORT_HH__
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