1 /* 2 * Copyright (C) 2002 - David W. Durham 3 * 4 * This file is part of ReZound, an audio editing application. 5 * 6 * ReZound is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published 8 * by the Free Software Foundation; either version 2 of the License, 9 * or (at your option) any later version. 10 * 11 * ReZound is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 19 */ 20 21 #ifndef __FXWaveCanvas_H__ 22 #define __FXWaveCanvas_H__ 23 24 /* 25 * This is an FXCanvas widget that can draw the waveform on itself. 26 * It is given a CSound object to from which get the audio data. 27 * It is given a horzontal and vertical zoom and a horizontal and 28 * vertical offset parameters for adjusting the view. 29 * 30 * This object, of course, has all the events of an FXCanvas for 31 * detecting things such as mouse events. 32 * 33 * ??? Potientially and frequency analysis mode should be supported. 34 * - I should store calculated data for FFT just like I do 35 */ 36 37 #include "../../config/common.h" 38 #include "fox_compat.h" 39 40 #include "../backend/CSound_defs.h" 41 class CLoadedSound; 42 43 class FXWaveCanvas : public FXCanvas 44 { 45 FXDECLARE(FXWaveCanvas) 46 public: 47 FXWaveCanvas(CLoadedSound* loadedSound, FXComposite* p, FXObject* tgt=NULL, FXSelector sel=0, FXuint opts=FRAME_NORMAL, FXint x=0, FXint y=0, FXint w=0, FXint h=0); 48 virtual ~FXWaveCanvas(); 49 50 void updateFromEdit(bool undoing=false); 51 52 enum LastChangedPositions { lcpNone,lcpStart,lcpStop }; 53 54 enum HorzRecenterTypes { hrtNone,hrtAuto,hrtStart,hrtStop,hrtLeftEdge }; 55 56 // v is 0 to 1 (0 is all the way zoomed out, 1 is all the way zoomed in) 57 void setHorzZoom(double v,HorzRecenterTypes horzRecenterType=hrtNone); 58 const double getHorzZoom() const; 59 60 // returns the width of the wave according to the zoom factor 61 const sample_pos_t getHorzSize() const; 62 63 void setHorzOffset(sample_pos_t v); 64 const sample_pos_t getHorzOffset() const; 65 66 67 68 // v is 0 to 1 (0 is all the way zoomed out, 1 is all the way zoomed in) 69 void setVertZoom(float v); 70 const float getVertZoom() const; 71 72 // returns the width of the wave according to the zoom factor 73 const int getVertSize() const; 74 75 void setVertOffset(int v); 76 const int getVertOffset() const; 77 78 79 const sample_pos_t getHorzOffsetToCenterTime(sample_pos_t time) const; 80 const sample_pos_t getHorzOffsetToCenterStartPos() const; 81 const sample_pos_t getHorzOffsetToCenterStopPos() const; 82 void showAmount(double seconds,sample_pos_t pos,int marginPixels=0); 83 84 const bool isStartPosOnScreen() const; 85 const bool isStopPosOnScreen() const; 86 87 const sample_fpos_t getRenderedDrawSelectStart() const; 88 const sample_fpos_t getRenderedDrawSelectStop() const; 89 const sample_fpos_t getDrawSelectStart() const; 90 const sample_fpos_t getDrawSelectStop() const; 91 92 const sample_pos_t snapPositionToCue(sample_pos_t p) const; 93 const FXint getCueScreenX(size_t cueIndex) const; 94 95 const sample_pos_t getSamplePosForScreenX(FXint X) const; 96 void setSelectStartFromScreen(FXint X); 97 void setSelectStopFromScreen(FXint X); 98 void updateFromSelectionChange(LastChangedPositions lastChangedPosition=lcpNone); 99 100 void drawPlayPosition(sample_pos_t dataPosition,bool justErasing,bool scrollToMakeVisible,FXScrollArea *optScrollArea); 101 102 103 long onPaint(FXObject *object,FXSelector sel,void *ptr); 104 bool first; 105 106 protected: FXWaveCanvas()107 FXWaveCanvas() {} 108 109 private: 110 void drawPortion(int left,int width,FXDCWindow *dc); 111 112 CLoadedSound *loadedSound; 113 114 sample_fpos_t horzZoomFactor; 115 float vertZoomFactor; 116 117 sample_pos_t horzOffset; 118 sample_fpos_t prevHorzZoomFactor_horzOffset; 119 120 int vertOffset; 121 122 FXint prevDrawPlayStatusX; 123 sample_pos_t renderedStartPosition,renderedStopPosition; 124 125 double lastHorzZoom; 126 float lastVertZoom; 127 128 LastChangedPositions lastChangedPosition; 129 bool lastDrawWasUnsuccessful; 130 }; 131 132 #endif 133