103 lines
3 KiB
C
103 lines
3 KiB
C
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/**
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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 pgVirtualFrame.h
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* @author drose
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* @date 2005-08-17
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*/
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#ifndef PGVIRTUALFRAME_H
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#define PGVIRTUALFRAME_H
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#include "pandabase.h"
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#include "pgItem.h"
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#include "modelNode.h"
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class TransformState;
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/**
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* This represents a frame that is rendered as a window onto another (possibly
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* much larger) canvas. You can only see the portion of the canvas that is
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* below the window at any given time.
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*
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* This works simply by automatically defining a scissor effect to be applied
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* to a special child node, called the canvas_node, of the PGVirtualFrame
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* node. Every object that is parented to the canvas_node will be clipped by
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* the scissor effect. Also, you can modify the canvas_transform through
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* convenience methods here, which actually modifies the transform on the
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* canvas_node.
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*
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* The net effect is that the virtual canvas is arbitrarily large, and we can
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* peek at it through the scissor region, and scroll through different parts
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* of it by modifying the canvas_transform.
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*
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* See PGScrollFrame for a specialization of this class that handles the
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* traditional scrolling canvas, with scroll bars.
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*/
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class EXPCL_PANDA_PGUI PGVirtualFrame : public PGItem {
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PUBLISHED:
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explicit PGVirtualFrame(const std::string &name = "");
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virtual ~PGVirtualFrame();
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protected:
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PGVirtualFrame(const PGVirtualFrame ©);
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virtual PandaNode *make_copy() const;
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virtual void r_copy_children(const PandaNode *from, InstanceMap &inst_map,
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Thread *current_thread);
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PUBLISHED:
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void setup(PN_stdfloat width, PN_stdfloat height);
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INLINE void set_clip_frame(PN_stdfloat left, PN_stdfloat right, PN_stdfloat bottom, PN_stdfloat top);
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void set_clip_frame(const LVecBase4 &clip_frame);
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INLINE const LVecBase4 &get_clip_frame() const;
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INLINE bool has_clip_frame() const;
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void clear_clip_frame();
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INLINE void set_canvas_transform(const TransformState *transform);
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INLINE const TransformState *get_canvas_transform() const;
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INLINE PandaNode *get_canvas_node() const;
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INLINE PandaNode *get_canvas_parent() const;
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protected:
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virtual void clip_frame_changed();
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private:
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void setup_child_nodes();
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protected:
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bool _has_clip_frame;
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LVecBase4 _clip_frame;
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PT(ModelNode) _canvas_node;
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PT(ModelNode) _canvas_parent;
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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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PGItem::init_type();
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register_type(_type_handle, "PGVirtualFrame",
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PGItem::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 "pgVirtualFrame.I"
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#endif
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