stage.h

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/*
 * Kage Studio - a simple free and open source vector-based 2D animation software
 * Copyright (C) 2011~2022  Mj Mendoza IV
 * 
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.  Or, see <https://www.gnu.org/licenses/>.
 * 
 */
 
#ifndef GTKMM_KAGE_STAGE_H
    #define GTKMM_KAGE_STAGE_H
    
    #include <gtkmm/drawingarea.h>
    #include <iostream>
    
    #include "../data/anchor.h"
    #include "../data/color.h"
    #include "../data/strokecolor.h"
    #include "../data/vectordata.h"
    #include "../vectordatamanager.h"
    #include <cairomm/context.h>
    #include <gdkmm/general.h> // set_source_pixbuf()
    #include "../../util/cairo/cairo_kage.h"
    
    class Kage; //forward declaration
    
    class KageStage : public Gtk::DrawingArea {
        public:
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_000;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_045;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_090;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_135;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_MOVE;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_NE;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_NW;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_SW;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_SE;
            static Glib::RefPtr<Gdk::Pixbuf> imageSHAPE_ROTATE;
            
            KageStage(Kage *p_kage);
            virtual ~KageStage();
        
            enum ToolMode {
                MODE_NONE,
                MODE_SELECT,
                MODE_NODE,
                MODE_STROKE,
                MODE_FILL,
                MODE_EYEDROP,
                MODE_ZOOM,
                MODE_MOVE_STAGE,
                MODE_DRAW_RECT,
                MODE_DRAW_TEXT,
                MODE_DRAW_POLY,
                MODE_DRAW_OVAL,
                MODE_DRAW_LINE,
                MODE_DRAW_PENCIL
            };
            const unsigned int _NO_SELECTION = -1;
            static ColorData fillColor; 
            static StrokeColorData stroke; 
            //any changes on color/stroke during use of Pencil will be stored on Pencil only
            static ColorData pencilFillColor; 
            static StrokeColorData pencilStroke; 
            static ToolMode toolMode;
            static GdkPoint moveStageXY;
            double fpsElapse;
            double propX = 0;
            int propXindex1;
            int propXindex2;
            double propY = 0;
            int propYindex1;
            int propYindex2;
            double propWidth = 0;
            double propHeight = 0;
            double nodeX = 0;
            double nodeY = 0;
            unsigned int nodeIndexX = 0;
            unsigned int nodeIndexY = 0;
            
            void printVectors();
            void cleanSlate();
            void invalidateToRender();
            bool _invalidated;
            
            void setFill(Gdk::Color p_Color);
            Gdk::Color getFill();
            void setStroke(Gdk::Color p_Color);
            Gdk::Color getStroke();
            double currentScale; 
            void clearScreen(Cairo::RefPtr<Cairo::Context> p_context);
            void renderFrame(Cairo::RefPtr<Cairo::Context> p_context, bool p_force = false);
            void renderOnionFrame(Cairo::RefPtr<Cairo::Context> p_context, vector<VectorData> p_vectorData, double p_alpha);
            void renderFrame(Cairo::RefPtr<Cairo::Context> p_context, vector<VectorData> p_vectorData, double p_alpha = 1.0);
            void renderFrameOffset(Cairo::RefPtr<Cairo::Context> p_context, bool p_force = false, double p_offsetX = 0.0, double p_offsetY = 0.0);
            void renderFrameOffset(Cairo::RefPtr<Cairo::Context> p_context, vector<VectorData> p_vectorData, double p_alpha = 1.0, double p_offsetX = 0.0, double p_offsetY = 0.0);
            unsigned int addImage(unsigned int p_ID);
            void initNodeTool();
            void handleShapes();
            void handleShapes_modifyingShapeRotate();
            void handleShapes_modifyingShape();
            void handleShapes_scaleNorth();
            void handleShapes_scaleEast();
            void handleShapes_scaleWest();
            void handleShapes_scaleSouth();
            void handleShapes_moveShape(double p_diffX, double p_diffY);
            void handleShapes_updateAnchors(double p_x, double p_y);
            void handleShapesMouseDown();
            void handleShapesMouseUp();
            void handleNodes();
            void handleNodes_selection();
            void handleNodes_relocation();
            void handleNodes_rendering();
            void handleNodesMouseDown();
            void handleNodesMouseUp();
            bool handleNodes_getNearestShape(double p_x, double p_y, unsigned int p_index, vector<VectorData> p_v);
            void handleDrawOvalMouseUp();
            void handleDrawRectMouseUp();
            void handleDrawPolyMouseUp();
            void handleDrawPencilMouseDown(PointData p_point);
            void handleDrawPencilMouseMove(PointData p_point);
            void handleDrawPencilMouseUp();
            void handleOval();
            void handleRect();
            void handlePoly();
            void handlePencil();
            void handleStroke(); //needed?
            void handleStrokeMouseMove();
            void handleStrokeMouseUp();
            void handleFill(); //needed?
            void handleFillMouseUp();
            void handleEyedrop();
            void handleEyedropMouseMove();
            void handleEyedropMouseUp();
            Glib::RefPtr<Gdk::Pixbuf> _bg;
            Cairo::RefPtr<Cairo::Surface> _bgcr;
            
            bool selectAllShapes();
            bool deselectSelectedShapes();
            bool deselectSelectedNodes();
            bool cancelDrawingPoly();
            bool cutSelectedShapes();
            bool copySelectedShapes();
            bool pasteSelectedShapes();
            bool deleteSelectedShapes();
            bool deleteSelectedNodes();
            bool toggleLineSelectedNodes();
            
            void updateNodeXY();
            bool isSelectedNode(unsigned int p_index);
            void addSelectedNode(unsigned int p_index);
            bool isSelectedShape(unsigned int p_index);
            void addSelectedShape(unsigned int p_index);
            void trySingleSelectShape();
            void tryMultiSelectShapes();
            void tryMultiSelectShapes_populateShapes();
            unsigned int getShape(unsigned int p_index, vector<VectorData> p_v);
 
            
            void updateShapeColor(bool p_doFill = true, bool p_doStroke = true);
            void updateShapeX(double p_value, bool p_stackDo = true);
            void updateShapeY(double p_value, bool p_stackDo = true);
            void updateShapeWidth(double p_value);
            void updateShapeHeight(double p_value);
            void updateNodeX(double p_value, bool p_stackDo = true);
            void updateNodeY(double p_value, bool p_stackDo = true);
            bool _stackDo = false;
            vector<VectorData> _vectorDataCopyBuffer;
            vector<VectorData> _vectorDataZOrderBufferA;
            vector<VectorData> _vectorDataZOrderBufferB;
            vector<VectorData> _vectorDataZOrderBufferC;
            
            bool renderToPNG(string p_path, bool p_transparent);
            bool renderToPNGOffset(string p_path, bool p_transparent, double p_offsetX = 0.0, double p_offsetY = 0.0);
            void renderFrameToPNG(Cairo::RefPtr<Cairo::Context> p_context);
            void renderFrameToPNGOffset(Cairo::RefPtr<Cairo::Context> p_context, double p_offsetX = 0.0, double p_offsetY = 0.0);
            
            Cairo::RefPtr<Cairo::Context> cr;
            PointData origin;
            
            bool _isModifyingShape;
            
            double _zoomRatio;
            double _zoomValue;
            PointData _zoomReference;
            PointData __origin;
            PointData __stageArea;
            
            PointData _rotateReference;
            
            PointData applyZoomRatio(PointData p_value);
            void applyZoom();
            vector<VectorData> applyZoom(vector<VectorData> p_v);
            
            bool _rotateMode;
            bool _rotateApply;
            
            void setSelectedShapes(vector<unsigned int> p_selectedShapes);
            vector<unsigned int> getSelectedShapes();
 
            void unpressKeys();
 
            vector<Cairo::RefPtr<Cairo::ImageSurface>> cairoPNG;
            static Cairo::RefPtr<Cairo::ImageSurface> cairoImageSurface;
        protected:
            ToolMode prevTool; //used by Hand-tool shortcut [spacebar]
            Kage *_kage;
            PointData draw1;
            PointData draw2;
            PointData drawFree1;
            PointData drawFree2;
            PointData drawFree3;
            PointData drawFree4;
            short int drawFreeCtr;
            GdkPoint drawConstraint;
            double polyXhead, polyYhead;
            double polyXtail, polyYtail;
            VectorDataManager _polyVectors;
            Glib::RefPtr<Gdk::Window> window;
            bool mouseDown;
            GdkPoint _mouseLocation;
            unsigned int _mouseLocationShapeIndex;
            GdkPoint _copyBufferMouse;
            bool draw;
            unsigned int drawCtr;
            //Override default signal handler:
            virtual bool on_expose_event(GdkEventExpose *e);
            virtual bool on_key_press_event(GdkEventKey *e) override;
            virtual bool on_key_release_event(GdkEventKey *e) override;
            virtual bool on_event(GdkEvent *e) override;
            
            bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr) override;
            
            bool on_timeout();
            unsigned int mouseOnNode;
            PointData mouseOnNodeOffset;
            unsigned int mouseOnNodeHover;
            unsigned int mouseOnNodeIndex;
            unsigned int selectedNode;
            unsigned int mouseOnShape;
            unsigned int selectedShape;
            vector<unsigned int> selectedNodes;
            vector<unsigned int> selectedShapes;
            
            AnchorData::type mouseOnAnchor;
            void renderNode(double p_x, double p_y, unsigned int p_state = 5);
            void renderNodeControl(double p_x, double p_y, bool p_selected);
            bool isMouseOnNode(double p_x, double p_y, unsigned int p_buffer = 5);
            
            PointData selectionBox1;
            PointData selectionBox2;
            bool isSelectionBoxNormalized();
            void normalizeSelectionBox();
            bool isNodeOnSelectionBox(double p_nodeX, double p_nodeY);
            
            void drawSelectionArea();
            
            bool deleteSelectedNode(unsigned int p_index);
            
            unsigned int getSelectedShapeViaNode(unsigned int p_index, vector<VectorData> p_v);
            double _nodeToMouseDistance;
            
            AnchorData anchor_upperLeft;
            AnchorData anchor_center;
            AnchorData anchor_lowerRight;
            
            AnchorData anchor_rotate; //for global use rotation-anchor
            
            bool keyShiftDown;
            bool keyControlDown;
            bool keyUpDown;
            bool keyDownDown;
            bool keyLeftDown;
            bool keyRightDown;
            
            int _registerWidth;
            int _registerHeight;
            
            void updateShapeXY();
    };
#endif // GTKMM_KAGE_STAGE_H