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/*
* Dillo Widget
*
* Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
* Copyright 2024 Rodrigo Arias Mallo <rodarima@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DW_FLTKVIEWPORT_HH__
#define __DW_FLTKVIEWPORT_HH__
#include <FL/Fl_Group.H>
#include <FL/Fl_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 scrollbarOnLeft;
int hasDragScroll, dragScrolling, dragX, dragY;
int horScrolling, verScrolling;
bool scrollbarPageMode;
int pageOverlap;
enum dw::core::ScrollCommand pageScrolling;
float pageScrollInterval;
float pageScrollDelay;
Fl_Scrollbar *vscrollbar, *hscrollbar;
GadgetOrientation gadgetOrientation[4];
lout::container::typed::List <lout::object::TypedPointer < Fl_Widget> >
*gadgets;
void adjustScrollbarsAndGadgetsAllocation ();
void adjustScrollbarValues ();
void hscrollbarChanged ();
void vscrollbarChanged ();
void positionChanged ();
static void hscrollbarCallback (Fl_Widget *hscrollbar, void *viewportPtr);
static void vscrollbarCallback (Fl_Widget *vscrollbar, void *viewportPtr);
void selectionScroll();
static void selectionScroll(void *vport);
void repeatPageScroll ();
static void repeatPageScroll (void *data);
void updateCanvasWidgets (int oldScrollX, int oldScrollY);
static void draw_area (void *data, int x, int y, int w, int h);
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 resize(int x, int y, int w, int h);
void draw ();
int handle (int event);
void setCanvasSize (int width, int ascent, int descent);
bool usesViewport ();
int getHScrollbarThickness ();
int getVScrollbarThickness ();
int getScrollbarOnLeft () {return scrollbarOnLeft; };
void scroll(int dx, int dy);
void scroll(dw::core::ScrollCommand cmd);
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 setDragScroll (bool enable) { hasDragScroll = enable ? 1 : 0; }
void addGadget (Fl_Widget *gadget);
void setScrollbarOnLeft (bool enable);
void setScrollbarPageMode(bool enable);
void setPageOverlap(int overlap);
};
} // namespace fltk
} // namespace dw
#endif // __DW_FLTKVIEWPORT_HH__
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