130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file pgScrollFrame.h
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* @author drose
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* @date 2005-08-17
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*/
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#ifndef PGSCROLLFRAME_H
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#define PGSCROLLFRAME_H
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#include "pandabase.h"
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#include "pgVirtualFrame.h"
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#include "pgSliderBarNotify.h"
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#include "pgSliderBar.h"
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#ifdef PHAVE_ATOMIC
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#include <atomic>
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#endif
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/**
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* This is a special kind of frame that pretends to be much larger than it
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* actually is. You can scroll through the frame, as if you're looking
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* through a window at the larger frame beneath. All children of this frame
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* node are scrolled and clipped as if they were children of the larger,
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* virtual frame.
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*
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* This is implemented as a specialization of PGVirtualFrame, which handles
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* the meat of the virtual canvas. This class adds automatic support for
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* scroll bars, and restricts the virtual transform to translate only (no
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* scale or rotate).
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*/
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class EXPCL_PANDA_PGUI PGScrollFrame : public PGVirtualFrame, public PGSliderBarNotify {
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PUBLISHED:
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explicit PGScrollFrame(const std::string &name = "");
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virtual ~PGScrollFrame();
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protected:
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PGScrollFrame(const PGScrollFrame ©);
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public:
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virtual PandaNode *make_copy() const;
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virtual bool cull_callback(CullTraverser *trav, CullTraverserData &data);
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virtual void xform(const LMatrix4 &mat);
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PUBLISHED:
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void setup(PN_stdfloat width, PN_stdfloat height,
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PN_stdfloat left, PN_stdfloat right, PN_stdfloat bottom, PN_stdfloat top,
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PN_stdfloat slider_width, PN_stdfloat bevel);
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INLINE void set_virtual_frame(PN_stdfloat left, PN_stdfloat right, PN_stdfloat bottom, PN_stdfloat top);
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INLINE void set_virtual_frame(const LVecBase4 &virtual_frame);
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INLINE const LVecBase4 &get_virtual_frame() const;
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INLINE bool has_virtual_frame() const;
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INLINE void clear_virtual_frame();
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INLINE void set_manage_pieces(bool manage_pieces);
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INLINE bool get_manage_pieces() const;
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INLINE void set_auto_hide(bool auto_hide);
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INLINE bool get_auto_hide() const;
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INLINE void set_horizontal_slider(PGSliderBar *horizontal_slider);
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INLINE void clear_horizontal_slider();
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INLINE PGSliderBar *get_horizontal_slider() const;
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INLINE void set_vertical_slider(PGSliderBar *vertical_slider);
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INLINE void clear_vertical_slider();
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INLINE PGSliderBar *get_vertical_slider() const;
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void remanage();
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INLINE void recompute();
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protected:
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virtual void frame_changed();
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virtual void item_transform_changed(PGItem *item);
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virtual void item_frame_changed(PGItem *item);
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virtual void item_draw_mask_changed(PGItem *item);
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virtual void slider_bar_adjust(PGSliderBar *slider_bar);
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private:
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void recompute_clip();
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void recompute_canvas();
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PN_stdfloat interpolate_canvas(PN_stdfloat clip_min, PN_stdfloat clip_max,
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PN_stdfloat canvas_min, PN_stdfloat canvas_max,
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PGSliderBar *slider_bar);
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private:
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bool _needs_remanage;
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bool _needs_recompute_clip;
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std::atomic_flag _canvas_computed;
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bool _has_virtual_frame;
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LVecBase4 _virtual_frame;
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bool _manage_pieces;
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bool _auto_hide;
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PT(PGSliderBar) _horizontal_slider;
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PT(PGSliderBar) _vertical_slider;
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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PGVirtualFrame::init_type();
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register_type(_type_handle, "PGScrollFrame",
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PGVirtualFrame::get_class_type());
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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};
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#include "pgScrollFrame.I"
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#endif
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