Initial import of Dillo

dw/fltkviewport.hh

@@ -0,0 +1,117 @@
+/*
+ * 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__
+