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// dataview.h
/******************************************************************************
*
* MiXViews - an X window system based sound & data editor/processor
*
* Copyright (c) 1993, 1994 Regents of the University of California
*
* Author: Douglas Scott
* Date: December 13, 1994
*
* Permission to use, copy and modify this software and its documentation
* for research and/or educational purposes and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation. The author reserves the right to distribute this
* software and its documentation. The University of California and the author
* make no representations about the suitability of this software for any
* purpose, and in no event shall University of California be liable for any
* damage, loss of data, or profits resulting from its use.
* It is provided "as is" without express or implied warranty.
*
******************************************************************************/
// The base class for the objects which control the visual display of Data
// objects. Its members are: a pointer to the Data instance, a pointer to
// the associated Controller, an array of Graph subclass instances, and various
// pointers to internal graphic elements. The Controller invokes DataView
// methods to change the display of the Data, and the DataView passes these
// messages on to its Graph subclass instances, which do the actual "work".
#ifndef DATAVIEW_H
#ifdef __GNUG__
#pragma interface
#endif
#define DATAVIEW_H
#include <InterViews/scene.h>
#include "range.h"
class HScale;
class VBox;
class Panner;
class Event;
class Perspective;
class Data;
class Controller;
class Graph;
class EditStatusDelegate;
class Block;
// Assisting class passed as an argument to the DataView constructor.
class ViewInfo {
public:
ViewInfo();
ViewInfo(RangeUnit units);
ViewInfo(RangeUnit, const Range&, const Range&);
RangeUnit rangeUnits;
Range frameRange;
Range channelRange;
};
class DataView : public MonoScene {
public:
DataView(Controller *, ViewInfo &);
virtual ~DataView();
redefined void Adjust(Perspective &);
redefined void Handle(Event &);
redefined void Update();
redefined void Reconfig();
// methods invoked by menu items
virtual void horizontalZoom();
virtual void horizontalUnZoom();
virtual void verticalZoom();
virtual void verticalUnZoom();
virtual void setVisibleFrameRange();
virtual void resetVerticalRange();
virtual void setChannelRange() {}
virtual void shiftChannelViewUp() {}
virtual void shiftChannelViewDown() {}
virtual void setInsertPoint();
virtual void setEditRegion();
virtual void toggleGraphMode() {}
virtual Range getHorizScaleRange()=0;
virtual Range getVisibleFrameRange()=0;
virtual void resetHorizontalScale() {}
virtual void setVisibleFrameRange(const Range &)=0;
virtual void setInsertPoint(int, const Range&, boolean scroll=true)=0;
virtual void setEditRegion(const Range&, const Range&, boolean scroll=true)=0;
virtual void unselect();
virtual Range getChannelRange()=0;
virtual void setChannelRange(const Range &)=0;
virtual Range getDisplayedHorizRange();
virtual void setHorizScaleLabel(const char *);
virtual void showVerticalScales(boolean show);
virtual boolean horizScaleInFrames();
virtual RangeUnit horizRangeUnits() { return currentRangeUnits; }
virtual boolean frameScaleInFrames()=0;
virtual double horizontalScalingFactor();
virtual boolean keyCommand(unsigned INT32 cmd);
protected:
redefined void Resize();
virtual void setHorizScaleTo(RangeUnit);
virtual void setHorizRangeUnits(RangeUnit unit) { currentRangeUnits = unit; }
Perspective& constrainView(Perspective &);
virtual int graphsVisible() { return graphsShown; }
virtual void incrementGraphsVisible() { graphsShown++; }
virtual void decrementGraphsVisible() { graphsShown--; }
virtual void updateGraphs();
virtual void doChange();
virtual void graphEvent(Interactor *, Event &);
virtual void unselectOthers(Interactor *);
virtual void addGraph(Graph *);
virtual void removeGraph(boolean update);
boolean doForGraphs(Block &);
Graph* topGraph() { return graphs[0]; } // for use by subclasses only
protected:
Data *dataptr;
Controller *controller;
VBox *interior;
VBox *graphBox;
HScale *hscale;
Perspective* shown;
private:
friend Controller;
friend class ViewChanger;
void Init(ViewInfo &);
virtual void initPerspective()=0;
virtual void checkPerspective()=0;
virtual Perspective* getVerticalPerspective() { return GetPerspective(); }
virtual Perspective* getHorizontalPerspective() { return GetPerspective(); }
Interactor *makeEditStatusPanel();
EditStatusDelegate* getEditDelegate() { return editDelegate; }
virtual const char* plotWidthAttribute()=0;
virtual void constrainHorizontalView(Perspective &);
virtual void constrainVerticalView(Perspective &) {}
virtual int horizScaleLeftSpacer();
virtual int horizScaleRightSpacer() { return 0; }
void expandGraphArray();
EditStatusDelegate* editDelegate;
Coord cursorLoc;
Graph **graphs;
Interactor* viewScroller;
int graphsShown;
int maxGraphs;
boolean perspectiveSet; // used to determine whether to initialize
RangeUnit currentRangeUnits;
};
class StatusPanel;
// This class functions as a relay for messages invoked by the DataEditor
// object regarding the numeric display of information about the data and its
// editing status. These messages are passed on to the StatusPanel members
// which display the numbers (these are visually contained within the View
// window).
class EditStatusDelegate : public Resource {
public:
virtual ~EditStatusDelegate();
void update(const Range& current);
void update() { update(editRange); }
private:
friend DataView;
EditStatusDelegate(DataView* view, StatusPanel* start, StatusPanel* end,
StatusPanel* dur);
StatusPanel* myStart;
StatusPanel* myEnd;
StatusPanel* myDur;
DataView* myView;
Range editRange;
};
#endif
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