svgui  1.9
Layer Class Reference

The base class for visual representations of the data found in a Model. More...

#include <Layer.h>

Inheritance diagram for Layer:
Collaboration diagram for Layer:

List of all members.

Classes

class  AddMeasurementRectCommand
class  DeleteMeasurementRectCommand
struct  MeasureRect

Public Types

enum  VerticalPosition { PositionTop, PositionMiddle, PositionBottom }
enum  SnapType { SnapLeft, SnapRight, SnapNearest, SnapNeighbouring }
enum  ColourSignificance {
  ColourAbsent, ColourIrrelevant, ColourDistinguishes, ColourAndBackgroundSignificant,
  ColourHasMeaningfulValue
}

Public Slots

void showLayer (View *, bool show)

Signals

void modelChanged ()
void modelCompletionChanged ()
void modelAlignmentCompletionChanged ()
void modelChangedWithin (int startFrame, int endFrame)
void modelReplaced ()
void layerParametersChanged ()
void layerParameterRangesChanged ()
void layerMeasurementRectsChanged ()
void layerNameChanged ()
void verticalZoomChanged ()

Public Member Functions

 Layer ()
virtual ~Layer ()
virtual const Model * getModel () const =0
Model * getModel ()
virtual const ZoomConstraint * getZoomConstraint () const
 Return a zoom constraint object defining the supported zoom levels for this layer.
virtual bool supportsOtherZoomLevels () const
 Return true if this layer can handle zoom levels other than those supported by its zoom constraint (presumably less efficiently or accurately than the officially supported zoom levels).
virtual void paint (View *, QPainter &, QRect) const =0
 Paint the given rectangle of this layer onto the given view using the given painter, superimposing it on top of any existing material in that view.
virtual void setSynchronousPainting (bool)
 Enable or disable synchronous painting.
virtual VerticalPosition getPreferredTimeRulerPosition () const
virtual VerticalPosition getPreferredFrameCountPosition () const
virtual bool hasLightBackground () const
virtual QString getPropertyContainerIconName () const
virtual QString getPropertyContainerName () const
virtual void setPresentationName (QString name)
virtual QString getLayerPresentationName () const
virtual QPixmap getLayerPresentationPixmap (QSize) const
virtual int getVerticalScaleWidth (View *, bool detailed, QPainter &) const =0
virtual void paintVerticalScale (View *, bool, QPainter &, QRect) const
virtual bool getCrosshairExtents (View *, QPainter &, QPoint, std::vector< QRect > &) const
virtual void paintCrosshairs (View *, QPainter &, QPoint) const
virtual void paintMeasurementRects (View *, QPainter &, bool showFocus, QPoint focusPoint) const
virtual bool nearestMeasurementRectChanged (View *, QPoint prev, QPoint now) const
virtual QString getFeatureDescription (View *, QPoint &) const
virtual QString getLabelPreceding (int) const
virtual bool snapToFeatureFrame (View *, int &, int &resolution, SnapType) const
 Adjust the given frame to snap to the nearest feature, if possible.
virtual bool snapToSimilarFeature (View *, int &, int &resolution, SnapType) const
 Adjust the given frame to snap to the next feature that has "effectively" the same value as the feature prior to the given frame, if possible.
virtual void drawStart (View *, QMouseEvent *)
virtual void drawDrag (View *, QMouseEvent *)
virtual void drawEnd (View *, QMouseEvent *)
virtual void eraseStart (View *, QMouseEvent *)
virtual void eraseDrag (View *, QMouseEvent *)
virtual void eraseEnd (View *, QMouseEvent *)
virtual void editStart (View *, QMouseEvent *)
virtual void editDrag (View *, QMouseEvent *)
virtual void editEnd (View *, QMouseEvent *)
virtual void splitStart (View *, QMouseEvent *)
virtual void splitEnd (View *, QMouseEvent *)
virtual void addNote (View *, QMouseEvent *)
virtual void measureStart (View *, QMouseEvent *)
virtual void measureDrag (View *, QMouseEvent *)
virtual void measureEnd (View *, QMouseEvent *)
virtual void measureDoubleClick (View *, QMouseEvent *)
virtual bool haveCurrentMeasureRect () const
virtual void deleteCurrentMeasureRect ()
virtual bool editOpen (View *, QMouseEvent *)
 Open an editor on the item under the mouse (e.g.
virtual void moveSelection (Selection, int)
virtual void resizeSelection (Selection, Selection)
virtual void deleteSelection (Selection)
virtual void copy (View *, Selection, Clipboard &)
virtual bool paste (View *, const Clipboard &, int, bool)
 Paste from the given clipboard onto the layer at the given frame offset.
virtual bool isLayerScrollable (const View *) const
 This should return true if the layer can safely be scrolled automatically by a given view (simply copying the existing data and then refreshing the exposed area) without altering its meaning.
virtual bool isLayerOpaque () const
 This should return true if the layer completely obscures any underlying layers.
virtual ColourSignificance getLayerColourSignificance () const =0
 This should return the degree of meaning associated with colour in this layer.
virtual bool isLayerEditable () const
 This should return true if the layer can be edited by the user.
virtual int getCompletion (View *) const
 Return the proportion of background work complete in drawing this view, as a percentage -- in most cases this will be the value returned by pointer from a call to the underlying model's isReady(int *) call.
virtual QString getError (View *) const
 Return an error string if any errors have occurred while loading or processing data for the given view.
virtual void setObjectName (const QString &name)
virtual void toXml (QTextStream &stream, QString indent="", QString extraAttributes="") const
 Convert the layer's data (though not those of the model it refers to) into XML for file output.
virtual void setProperties (const QXmlAttributes &)=0
 Set the particular properties of a layer (those specific to the subclass) from a set of XML attributes.
virtual void toBriefXml (QTextStream &stream, QString indent="", QString extraAttributes="") const
 Produce XML containing the layer's ID and type.
virtual void addMeasurementRect (const QXmlAttributes &)
 Add a measurement rectangle from the given XML attributes (presumably taken from a measurement element).
virtual void setLayerDormant (const View *v, bool dormant)
 Indicate that a layer is not currently visible in the given view and is not expected to become visible in the near future (for example because the user has explicitly removed or hidden it).
virtual bool isLayerDormant (const View *v) const
 Return whether the layer is dormant (i.e.
virtual PlayParameters * getPlayParameters ()
virtual bool needsTextLabelHeight () const
virtual bool hasTimeXAxis () const
virtual bool getValueExtents (float &min, float &max, bool &logarithmic, QString &unit) const =0
 Return the minimum and maximum values for the y axis of the model in this layer, as well as whether the layer is configured to use a logarithmic y axis display.
virtual bool getDisplayExtents (float &, float &) const
 Return the minimum and maximum values within the displayed range for the y axis, if only a subset of the whole range of the model (returned by getValueExtents) is being displayed.
virtual bool setDisplayExtents (float, float)
 Set the displayed minimum and maximum values for the y axis to the given range, if supported.
virtual bool getXScaleValue (const View *v, int x, float &value, QString &unit) const
 Return the value and unit at the given x coordinate in the given view.
virtual bool getYScaleValue (const View *, int, float &, QString &) const
 Return the value and unit at the given y coordinate in the given view.
virtual bool getYScaleDifference (const View *v, int y0, int y1, float &diff, QString &unit) const
 Return the difference between the values at the given y coordinates in the given view, and the unit of the difference.
virtual int getVerticalZoomSteps (int &) const
 Get the number of vertical zoom steps available for this layer.
virtual int getCurrentVerticalZoomStep () const
 Get the current vertical zoom step.
virtual void setVerticalZoomStep (int)
 Set the vertical zoom step.
virtual RangeMapper * getNewVerticalZoomRangeMapper () const
 Create and return a range mapper for vertical zoom step values.

Protected Types

typedef std::set< MeasureRectMeasureRectSet

Protected Member Functions

void connectSignals (const Model *)
virtual int alignToReference (View *v, int frame) const
virtual int alignFromReference (View *v, int frame) const
bool clipboardHasDifferentAlignment (View *v, const Clipboard &clip) const
void addMeasureRectToSet (const MeasureRect &r)
void deleteMeasureRectFromSet (const MeasureRect &r)
void updateMeasurePixrects (View *v) const
virtual void updateMeasureRectYCoords (View *v, const MeasureRect &r) const
virtual void setMeasureRectYCoord (View *v, MeasureRect &r, bool start, int y) const
virtual void setMeasureRectFromPixrect (View *v, MeasureRect &r, QRect pixrect) const
MeasureRectSet::const_iterator findFocusedMeasureRect (QPoint) const
void paintMeasurementRect (View *v, QPainter &paint, const MeasureRect &r, bool focus) const

Protected Attributes

MeasureRectSet m_measureRects
MeasureRect m_draggingRect
bool m_haveDraggingRect
bool m_haveCurrentMeasureRect
QPoint m_currentMeasureRectPoint
QString m_presentationName

Private Attributes

QMutex m_dormancyMutex
std::map< const void *, bool > m_dormancy

Detailed Description

The base class for visual representations of the data found in a Model.

Layers are expected to be able to draw themselves onto a View, and may also be editable.

Definition at line 52 of file Layer.h.


Member Typedef Documentation

typedef std::set<MeasureRect> Layer::MeasureRectSet [protected]

Definition at line 598 of file Layer.h.


Member Enumeration Documentation

Enumerator:
PositionTop 
PositionMiddle 
PositionBottom 

Definition at line 106 of file Layer.h.

Enumerator:
SnapLeft 
SnapRight 
SnapNearest 
SnapNeighbouring 

Definition at line 157 of file Layer.h.

Enumerator:
ColourAbsent 
ColourIrrelevant 
ColourDistinguishes 
ColourAndBackgroundSignificant 
ColourHasMeaningfulValue 

Definition at line 304 of file Layer.h.


Constructor & Destructor Documentation

Definition at line 37 of file Layer.cpp.

Layer::~Layer ( ) [virtual]

Definition at line 43 of file Layer.cpp.


Member Function Documentation

Model* Layer::getModel ( ) [inline]

Definition at line 62 of file Layer.h.

References getModel().

virtual const ZoomConstraint* Layer::getZoomConstraint ( ) const [inline, virtual]

Return a zoom constraint object defining the supported zoom levels for this layer.

If this returns zero, the layer will support any integer zoom level.

Reimplemented in SpectrogramLayer, Colour3DPlotLayer, and WaveformLayer.

Definition at line 71 of file Layer.h.

virtual bool Layer::supportsOtherZoomLevels ( ) const [inline, virtual]

Return true if this layer can handle zoom levels other than those supported by its zoom constraint (presumably less efficiently or accurately than the officially supported zoom levels).

If true, the layer will unenthusistically accept any integer zoom level from 1 to the maximum returned by its zoom constraint.

Definition at line 81 of file Layer.h.

virtual void Layer::paint ( View ,
QPainter &  ,
QRect   
) const [pure virtual]

Paint the given rectangle of this layer onto the given view using the given painter, superimposing it on top of any existing material in that view.

The view is provided here because it is possible for one layer to exist in more than one view, so the dimensions of the view may vary from one paint call to another (without any view having been resized).

Implemented in SpectrogramLayer, Colour3DPlotLayer, SpectrumLayer, RegionLayer, FlexiNoteLayer, ImageLayer, SliceLayer, WaveformLayer, TimeValueLayer, NoteLayer, TimeInstantLayer, TextLayer, and TimeRulerLayer.

virtual void Layer::setSynchronousPainting ( bool  ) [inline, virtual]

Enable or disable synchronous painting.

If synchronous painting is enabled, a call to paint() must complete painting the entire rectangle before it returns. If synchronous painting is disabled (which should be the default), the paint() call may defer painting some regions if data is not yet available, by calling back on its view to schedule another update. Synchronous painting is necessary when rendering to an image. Simple layer types will always paint synchronously, and so may ignore this.

Reimplemented in SpectrogramLayer.

Definition at line 104 of file Layer.h.

virtual VerticalPosition Layer::getPreferredTimeRulerPosition ( ) const [inline, virtual]

Definition at line 109 of file Layer.h.

References PositionMiddle.

virtual VerticalPosition Layer::getPreferredFrameCountPosition ( ) const [inline, virtual]

Reimplemented in SpectrogramLayer, and SpectrumLayer.

Definition at line 112 of file Layer.h.

References PositionBottom.

virtual bool Layer::hasLightBackground ( ) const [inline, virtual]

Reimplemented in SpectrogramLayer, and SingleColourLayer.

Definition at line 115 of file Layer.h.

QString Layer::getPropertyContainerIconName ( ) const [virtual]

Definition at line 65 of file Layer.cpp.

References LayerFactory::getInstance(), and LayerFactory::getLayerIconName().

Referenced by LayerTreeModel::data().

virtual QString Layer::getPropertyContainerName ( ) const [inline, virtual]

Definition at line 121 of file Layer.h.

References m_presentationName.

void Layer::setPresentationName ( QString  name) [virtual]

Definition at line 72 of file Layer.cpp.

References m_presentationName.

virtual QPixmap Layer::getLayerPresentationPixmap ( QSize  ) const [inline, virtual]

Reimplemented in SingleColourLayer.

Definition at line 129 of file Layer.h.

virtual void Layer::paintVerticalScale ( View ,
bool  ,
QPainter &  ,
QRect   
) const [inline, virtual]
virtual bool Layer::getCrosshairExtents ( View ,
QPainter &  ,
QPoint  ,
std::vector< QRect > &   
) const [inline, virtual]

Reimplemented in SpectrogramLayer, and SpectrumLayer.

Definition at line 137 of file Layer.h.

virtual void Layer::paintCrosshairs ( View ,
QPainter &  ,
QPoint   
) const [inline, virtual]

Reimplemented in SpectrogramLayer, and SpectrumLayer.

Definition at line 141 of file Layer.h.

void Layer::paintMeasurementRects ( View v,
QPainter &  paint,
bool  showFocus,
QPoint  focusPoint 
) const [virtual]
bool Layer::nearestMeasurementRectChanged ( View v,
QPoint  prev,
QPoint  now 
) const [virtual]

Definition at line 460 of file Layer.cpp.

References findFocusedMeasureRect(), and updateMeasurePixrects().

Referenced by Pane::mouseMoveEvent().

virtual QString Layer::getFeatureDescription ( View ,
QPoint &   
) const [inline, virtual]
virtual QString Layer::getLabelPreceding ( int  ) const [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, and TimeInstantLayer.

Definition at line 153 of file Layer.h.

virtual bool Layer::snapToFeatureFrame ( View ,
int &  ,
int &  resolution,
SnapType   
) const [inline, virtual]

Adjust the given frame to snap to the nearest feature, if possible.

If snap is SnapLeft or SnapRight, adjust the frame to match that of the nearest feature in the given direction regardless of how far away it is. If snap is SnapNearest, adjust the frame to that of the nearest feature in either direction. If snap is SnapNeighbouring, adjust the frame to that of the nearest feature if it is close, and leave it alone (returning false) otherwise. SnapNeighbouring should always choose the same feature that would be used in an editing operation through calls to editStart etc.

Return true if a suitable feature was found and frame adjusted accordingly. Return false if no suitable feature was available (and leave frame unmodified). If returning true, also return the resolution of the model in this layer in sample frames.

Reimplemented in SpectrogramLayer, Colour3DPlotLayer, RegionLayer, FlexiNoteLayer, TimeValueLayer, ImageLayer, NoteLayer, TimeRulerLayer, TimeInstantLayer, and TextLayer.

Definition at line 183 of file Layer.h.

Referenced by Pane::dragExtendSelection(), and Pane::mousePressEvent().

virtual bool Layer::snapToSimilarFeature ( View ,
int &  ,
int &  resolution,
SnapType   
) const [inline, virtual]

Adjust the given frame to snap to the next feature that has "effectively" the same value as the feature prior to the given frame, if possible.

The snap type must be SnapLeft (snap to the time of the next feature prior to the one preceding the given frame that has a similar value to it) or SnapRight (snap to the time of the next feature following the given frame that has a similar value to the feature preceding it). Other values are not permitted.

Return true if a suitable feature was found and frame adjusted accordingly. Return false if no suitable feature was available (and leave frame unmodified). If returning true, also return the resolution of the model in this layer in sample frames.

Reimplemented in RegionLayer, and TimeValueLayer.

Definition at line 207 of file Layer.h.

virtual void Layer::drawStart ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, ImageLayer, NoteLayer, TimeInstantLayer, and TextLayer.

Definition at line 220 of file Layer.h.

Referenced by Pane::mousePressEvent().

virtual void Layer::drawDrag ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, ImageLayer, NoteLayer, TimeInstantLayer, and TextLayer.

Definition at line 221 of file Layer.h.

Referenced by Pane::mouseMoveEvent().

virtual void Layer::drawEnd ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, ImageLayer, NoteLayer, TimeInstantLayer, and TextLayer.

Definition at line 222 of file Layer.h.

Referenced by Pane::mouseReleaseEvent().

virtual void Layer::eraseStart ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, NoteLayer, TimeInstantLayer, and TextLayer.

Definition at line 224 of file Layer.h.

Referenced by Pane::mousePressEvent().

virtual void Layer::eraseDrag ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, NoteLayer, TimeInstantLayer, and TextLayer.

Definition at line 225 of file Layer.h.

Referenced by Pane::mouseMoveEvent().

virtual void Layer::eraseEnd ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, NoteLayer, TimeInstantLayer, and TextLayer.

Definition at line 226 of file Layer.h.

Referenced by Pane::mouseReleaseEvent().

virtual void Layer::editStart ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, NoteLayer, ImageLayer, TimeInstantLayer, and TextLayer.

Definition at line 228 of file Layer.h.

Referenced by Pane::mouseMoveEvent().

virtual void Layer::editDrag ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, NoteLayer, ImageLayer, TimeInstantLayer, and TextLayer.

Definition at line 229 of file Layer.h.

Referenced by Pane::mouseMoveEvent().

virtual void Layer::editEnd ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in RegionLayer, TimeValueLayer, FlexiNoteLayer, NoteLayer, ImageLayer, TimeInstantLayer, and TextLayer.

Definition at line 230 of file Layer.h.

Referenced by Pane::mouseReleaseEvent().

virtual void Layer::splitStart ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in FlexiNoteLayer.

Definition at line 232 of file Layer.h.

Referenced by Pane::mousePressEvent().

virtual void Layer::splitEnd ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in FlexiNoteLayer.

Definition at line 233 of file Layer.h.

Referenced by Pane::mouseReleaseEvent().

virtual void Layer::addNote ( View ,
QMouseEvent *   
) [inline, virtual]

Reimplemented in FlexiNoteLayer.

Definition at line 234 of file Layer.h.

Referenced by Pane::mouseDoubleClickEvent().

void Layer::measureStart ( View v,
QMouseEvent *  e 
) [virtual]

Definition at line 374 of file Layer.cpp.

References m_draggingRect, m_haveDraggingRect, and setMeasureRectFromPixrect().

Referenced by Pane::mousePressEvent().

void Layer::measureDrag ( View v,
QMouseEvent *  e 
) [virtual]
void Layer::measureDoubleClick ( View ,
QMouseEvent *   
) [virtual]

Reimplemented in SpectrogramLayer.

Definition at line 408 of file Layer.cpp.

Referenced by Pane::mouseDoubleClickEvent().

virtual bool Layer::haveCurrentMeasureRect ( ) const [inline, virtual]

Definition at line 245 of file Layer.h.

References m_haveCurrentMeasureRect.

virtual bool Layer::editOpen ( View ,
QMouseEvent *   
) [inline, virtual]

Open an editor on the item under the mouse (e.g.

on double-click). If there is no item or editing is not supported, return false.

Reimplemented in FlexiNoteLayer, RegionLayer, TimeValueLayer, ImageLayer, TextLayer, NoteLayer, and TimeInstantLayer.

Definition at line 255 of file Layer.h.

Referenced by Pane::mouseDoubleClickEvent().

virtual void Layer::moveSelection ( Selection  ,
int   
) [inline, virtual]

Reimplemented in FlexiNoteLayer, RegionLayer, TimeValueLayer, NoteLayer, TimeInstantLayer, ImageLayer, and TextLayer.

Definition at line 257 of file Layer.h.

Referenced by Pane::editSelectionEnd().

virtual void Layer::resizeSelection ( Selection  ,
Selection   
) [inline, virtual]

Reimplemented in FlexiNoteLayer, RegionLayer, TimeValueLayer, NoteLayer, TimeInstantLayer, ImageLayer, and TextLayer.

Definition at line 258 of file Layer.h.

Referenced by Pane::editSelectionEnd().

virtual void Layer::deleteSelection ( Selection  ) [inline, virtual]

Reimplemented in FlexiNoteLayer, RegionLayer, TimeValueLayer, NoteLayer, TimeInstantLayer, ImageLayer, and TextLayer.

Definition at line 259 of file Layer.h.

virtual void Layer::copy ( View ,
Selection  ,
Clipboard &   
) [inline, virtual]
virtual bool Layer::paste ( View ,
const Clipboard &  ,
int  ,
bool   
) [inline, virtual]

Paste from the given clipboard onto the layer at the given frame offset.

If interactive is true, the layer may ask the user about paste options through a dialog if desired, and may return false if the user cancelled the paste operation. This function should return true if a paste actually occurred.

Reimplemented in FlexiNoteLayer, RegionLayer, TimeValueLayer, NoteLayer, TimeInstantLayer, ImageLayer, and TextLayer.

Definition at line 270 of file Layer.h.

virtual bool Layer::isLayerScrollable ( const View ) const [inline, virtual]

This should return true if the layer can safely be scrolled automatically by a given view (simply copying the existing data and then refreshing the exposed area) without altering its meaning.

For the view widget as a whole this is usually not possible because of invariant (non-scrolling) material displayed over the top, but the widget may be able to optimise scrolling better if it is known that individual views can be scrolled safely in this way.

Reimplemented in SpectrogramLayer, WaveformLayer, TimeValueLayer, FlexiNoteLayer, RegionLayer, NoteLayer, TimeInstantLayer, ImageLayer, SpectrumLayer, TextLayer, SliceLayer, and Colour3DPlotLayer.

Definition at line 292 of file Layer.h.

virtual bool Layer::isLayerOpaque ( ) const [inline, virtual]

This should return true if the layer completely obscures any underlying layers.

It's used to determine whether the view can safely draw any selection rectangles under the layer instead of over it, in the case where the layer is not scrollable and therefore needs to be redrawn each time (so that the selection rectangle can be cached).

Reimplemented in SpectrogramLayer.

Definition at line 302 of file Layer.h.

Referenced by View::getAligningModel().

virtual ColourSignificance Layer::getLayerColourSignificance ( ) const [pure virtual]

This should return the degree of meaning associated with colour in this layer.

If ColourAbsent, the layer does not use colour. If ColourIrrelevant, the layer is coloured and the colour may be set by the user, but it doesn't really matter what the colour is (for example, in a time ruler layer). If ColourDistinguishes, then the colour is used to distinguish this layer from other similar layers (e.g. for data layers). If ColourAndBackgroundSignificant, then the layer should be given greater weight than ColourDistinguishes layers when choosing a background colour (e.g. for waveforms). If ColourHasMeaningfulValue, colours are actually meaningful -- the view will then show selections using unfilled rectangles instead of translucent filled rectangles, so as not to disturb the colours underneath.

Implemented in SpectrogramLayer, TimeValueLayer, TimeInstantLayer, ImageLayer, Colour3DPlotLayer, SingleColourLayer, SliceLayer, TimeRulerLayer, and WaveformLayer.

virtual bool Layer::isLayerEditable ( ) const [inline, virtual]

This should return true if the layer can be edited by the user.

If this is the case, the appropriate edit tools may be made available by the application and the layer's drawStart/Drag/End and editStart/Drag/End methods should be implemented.

Reimplemented in TimeValueLayer, FlexiNoteLayer, RegionLayer, NoteLayer, TimeInstantLayer, ImageLayer, and TextLayer.

Definition at line 338 of file Layer.h.

Referenced by Pane::mouseDoubleClickEvent(), Pane::mouseMoveEvent(), Pane::mousePressEvent(), Pane::mouseReleaseEvent(), Pane::shouldIlluminateLocalSelection(), and Pane::updateContextHelp().

virtual int Layer::getCompletion ( View ) const [inline, virtual]

Return the proportion of background work complete in drawing this view, as a percentage -- in most cases this will be the value returned by pointer from a call to the underlying model's isReady(int *) call.

The view may choose to show a progress meter if it finds that this returns < 100 at any given moment.

Reimplemented in SpectrogramLayer, WaveformLayer, TimeValueLayer, FlexiNoteLayer, RegionLayer, NoteLayer, TimeInstantLayer, ImageLayer, TextLayer, and Colour3DPlotLayer.

Definition at line 347 of file Layer.h.

virtual QString Layer::getError ( View ) const [inline, virtual]

Return an error string if any errors have occurred while loading or processing data for the given view.

Return the empty string if no error has occurred.

Reimplemented in SpectrogramLayer.

Definition at line 354 of file Layer.h.

void Layer::setObjectName ( const QString &  name) [virtual]

Definition at line 100 of file Layer.cpp.

References layerNameChanged().

Referenced by LayerFactory::createLayer().

void Layer::toXml ( QTextStream &  stream,
QString  indent = "",
QString  extraAttributes = "" 
) const [virtual]

Convert the layer's data (though not those of the model it refers to) into XML for file output.

This class implements the basic name/type/model-id output; subclasses will typically call this superclass implementation with extra attributes describing their particular properties.

Reimplemented in SpectrogramLayer, WaveformLayer, Colour3DPlotLayer, FlexiNoteLayer, TimeValueLayer, NoteLayer, RegionLayer, SliceLayer, TimeInstantLayer, SpectrumLayer, ImageLayer, TextLayer, SingleColourLayer, and TimeRulerLayer.

Definition at line 592 of file Layer.cpp.

References LayerFactory::getInstance(), getModel(), m_measureRects, and m_presentationName.

virtual void Layer::setProperties ( const QXmlAttributes &  ) [pure virtual]

Set the particular properties of a layer (those specific to the subclass) from a set of XML attributes.

This is the effective inverse of the toXml method.

Implemented in SpectrogramLayer, WaveformLayer, FlexiNoteLayer, TimeValueLayer, NoteLayer, RegionLayer, TimeInstantLayer, ImageLayer, TextLayer, Colour3DPlotLayer, SingleColourLayer, SpectrumLayer, SliceLayer, and TimeRulerLayer.

Referenced by LayerFactory::setLayerDefaultProperties().

void Layer::toBriefXml ( QTextStream &  stream,
QString  indent = "",
QString  extraAttributes = "" 
) const [virtual]

Produce XML containing the layer's ID and type.

This is used to refer to the layer in the display section of the SV session file, for a layer that has already been described in the data section.

Definition at line 626 of file Layer.cpp.

References LayerFactory::getInstance(), getModel(), and m_presentationName.

void Layer::addMeasurementRect ( const QXmlAttributes &  attributes) [virtual]

Add a measurement rectangle from the given XML attributes (presumably taken from a measurement element).

Does not use a command.

Definition at line 317 of file Layer.cpp.

References addMeasureRectToSet(), Layer::MeasureRect::endFrame, Layer::MeasureRect::endY, Layer::MeasureRect::haveFrames, Layer::MeasureRect::pixrect, Layer::MeasureRect::startFrame, and Layer::MeasureRect::startY.

void Layer::setLayerDormant ( const View v,
bool  dormant 
) [virtual]

Indicate that a layer is not currently visible in the given view and is not expected to become visible in the near future (for example because the user has explicitly removed or hidden it).

The layer may respond by (for example) freeing any cache memory it is using, until next time its paint method is called, when it should set itself un-dormant again.

A layer class that overrides this function must also call this class's implementation.

Reimplemented in SpectrogramLayer, ImageLayer, and Colour3DPlotLayer.

Definition at line 118 of file Layer.cpp.

References m_dormancy, and m_dormancyMutex.

Referenced by SpectrogramLayer::paint(), and showLayer().

bool Layer::isLayerDormant ( const View v) const [virtual]
virtual bool Layer::needsTextLabelHeight ( ) const [inline, virtual]

Reimplemented in TimeValueLayer, and TimeInstantLayer.

Definition at line 413 of file Layer.h.

virtual bool Layer::hasTimeXAxis ( ) const [inline, virtual]

Reimplemented in SliceLayer.

Definition at line 415 of file Layer.h.

Referenced by getXScaleValue(), Pane::mouseMoveEvent(), and setMeasureRectFromPixrect().

virtual bool Layer::getValueExtents ( float &  min,
float &  max,
bool &  logarithmic,
QString &  unit 
) const [pure virtual]

Return the minimum and maximum values for the y axis of the model in this layer, as well as whether the layer is configured to use a logarithmic y axis display.

Also return the unit for these values if known.

This function returns the "normal" extents for the layer, not necessarily the extents actually in use in the display.

Implemented in SpectrogramLayer, WaveformLayer, Colour3DPlotLayer, TimeValueLayer, FlexiNoteLayer, RegionLayer, NoteLayer, TimeInstantLayer, ImageLayer, TextLayer, SpectrumLayer, SliceLayer, and TimeRulerLayer.

Referenced by Pane::drawVerticalScale(), and Pane::getTopLayerDisplayExtents().

virtual bool Layer::getDisplayExtents ( float &  ,
float &   
) const [inline, virtual]

Return the minimum and maximum values within the displayed range for the y axis, if only a subset of the whole range of the model (returned by getValueExtents) is being displayed.

Return false if the layer is not imposing a particular display extent (using the normal layer extents or deferring to whatever is in use for the same units elsewhere in the view).

Reimplemented in SpectrogramLayer, Colour3DPlotLayer, TimeValueLayer, FlexiNoteLayer, RegionLayer, and NoteLayer.

Definition at line 437 of file Layer.h.

Referenced by Pane::drawVerticalScale(), and Pane::getTopLayerDisplayExtents().

virtual bool Layer::setDisplayExtents ( float  ,
float   
) [inline, virtual]

Set the displayed minimum and maximum values for the y axis to the given range, if supported.

Return false if not supported on this layer (and set nothing). In most cases, layers that return false for getDisplayExtents should also return false for this function.

Reimplemented in SpectrogramLayer, Colour3DPlotLayer, TimeValueLayer, FlexiNoteLayer, and NoteLayer.

Definition at line 449 of file Layer.h.

Referenced by Pane::setTopLayerDisplayExtents(), FlexiNoteLayer::setVerticalRangeToNoteRange(), and Pane::zoomToRegion().

bool Layer::getXScaleValue ( const View v,
int  x,
float &  value,
QString &  unit 
) const [virtual]

Return the value and unit at the given x coordinate in the given view.

This is for descriptive purposes using the measurement tool. The default implementation works correctly if the layer hasTimeXAxis().

Reimplemented in SpectrumLayer.

Definition at line 142 of file Layer.cpp.

References View::getFrameForX(), getModel(), and hasTimeXAxis().

Referenced by View::drawMeasurementRect().

virtual bool Layer::getYScaleValue ( const View ,
int  ,
float &  ,
QString &   
) const [inline, virtual]

Return the value and unit at the given y coordinate in the given view.

Reimplemented in SpectrogramLayer, WaveformLayer, Colour3DPlotLayer, and SpectrumLayer.

Definition at line 467 of file Layer.h.

Referenced by View::drawMeasurementRect(), and getYScaleDifference().

bool Layer::getYScaleDifference ( const View v,
int  y0,
int  y1,
float &  diff,
QString &  unit 
) const [virtual]

Return the difference between the values at the given y coordinates in the given view, and the unit of the difference.

The default implementation just calls getYScaleValue twice and returns the difference, with the same unit.

Reimplemented in WaveformLayer, and SpectrumLayer.

Definition at line 155 of file Layer.cpp.

References getYScaleValue().

Referenced by View::drawMeasurementRect().

virtual int Layer::getVerticalZoomSteps ( int &  ) const [inline, virtual]

Get the number of vertical zoom steps available for this layer.

If vertical zooming is not available, return 0. The meaning of "zooming" is entirely up to the layer -- changing the zoom level may cause the layer to reset its display extents or change another property such as display gain. However, layers are advised for consistency to treat smaller zoom steps as "more distant" or "zoomed out" and larger ones as "closer" or "zoomed in".

Layers that provide this facility should also emit the verticalZoomChanged signal if their vertical zoom changes due to factors other than setVerticalZoomStep being called.

Reimplemented in SpectrogramLayer, WaveformLayer, Colour3DPlotLayer, TimeValueLayer, FlexiNoteLayer, and NoteLayer.

Definition at line 495 of file Layer.h.

Referenced by Pane::updateHeadsUpDisplay(), Pane::updateVerticalPanner(), and Pane::verticalThumbwheelMoved().

virtual int Layer::getCurrentVerticalZoomStep ( ) const [inline, virtual]

Get the current vertical zoom step.

A layer may support finer control over ranges etc than is available through the integer zoom step mechanism; if this one does, it should just return the nearest of the available zoom steps to the current settings.

Reimplemented in SpectrogramLayer, WaveformLayer, Colour3DPlotLayer, TimeValueLayer, FlexiNoteLayer, and NoteLayer.

Definition at line 503 of file Layer.h.

Referenced by Pane::updateHeadsUpDisplay(), and Pane::verticalZoomChanged().

virtual void Layer::setVerticalZoomStep ( int  ) [inline, virtual]

Set the vertical zoom step.

The meaning of "zooming" is entirely up to the layer -- changing the zoom level may cause the layer to reset its display extents or change another property such as display gain.

Reimplemented in SpectrogramLayer, WaveformLayer, Colour3DPlotLayer, TimeValueLayer, FlexiNoteLayer, and NoteLayer.

Definition at line 511 of file Layer.h.

Referenced by Pane::verticalThumbwheelMoved().

virtual RangeMapper* Layer::getNewVerticalZoomRangeMapper ( ) const [inline, virtual]

Create and return a range mapper for vertical zoom step values.

See the RangeMapper documentation for more details. The returned value is allocated on the heap and will be deleted by the caller.

Reimplemented in SpectrogramLayer, Colour3DPlotLayer, TimeValueLayer, FlexiNoteLayer, and NoteLayer.

Definition at line 519 of file Layer.h.

Referenced by Pane::propertyContainerSelected(), and Pane::updateHeadsUpDisplay().

void Layer::showLayer ( View view,
bool  show 
) [slot]
void Layer::modelCompletionChanged ( ) [signal]

Referenced by connectSignals().

Referenced by connectSignals().

void Layer::modelChangedWithin ( int  startFrame,
int  endFrame 
) [signal]
void Layer::layerParametersChanged ( ) [signal]

Referenced by SpectrogramLayer::preferenceChanged(), WaveformLayer::setAggressiveCacheing(), WaveformLayer::setAutoNormalize(), SingleColourLayer::setBaseColour(), SpectrogramLayer::setBinDisplay(), SliceLayer::setBinScale(), Colour3DPlotLayer::setBinScale(), SpectrumLayer::setChannel(), SpectrogramLayer::setChannel(), WaveformLayer::setChannel(), WaveformLayer::setChannelMode(), Colour3DPlotLayer::setColourMap(), SpectrogramLayer::setColourMap(), SpectrogramLayer::setColourRotation(), Colour3DPlotLayer::setColourScale(), SpectrogramLayer::setColourScale(), NoteLayer::setDisplayExtents(), FlexiNoteLayer::setDisplayExtents(), TimeValueLayer::setDisplayExtents(), Colour3DPlotLayer::setDisplayExtents(), SpectrogramLayer::setDisplayExtents(), TimeValueLayer::setDrawSegmentDivisions(), SliceLayer::setEnergyScale(), SliceLayer::setFillColourMap(), TimeValueLayer::setFillColourMap(), RegionLayer::setFillColourMap(), SpectrogramLayer::setFrequencyScale(), WaveformLayer::setGain(), SliceLayer::setGain(), Colour3DPlotLayer::setGain(), SpectrogramLayer::setGain(), Colour3DPlotLayer::setInvertVertical(), SpectrogramLayer::setMaxFrequency(), WaveformLayer::setMiddleLineHeight(), SpectrogramLayer::setMinFrequency(), SpectrumLayer::setModel(), WaveformLayer::setModel(), SliceLayer::setNormalize(), Colour3DPlotLayer::setNormalizeColumns(), SpectrogramLayer::setNormalizeColumns(), Colour3DPlotLayer::setNormalizeHybrid(), SpectrogramLayer::setNormalizeHybrid(), Colour3DPlotLayer::setNormalizeVisibleArea(), SpectrogramLayer::setNormalizeVisibleArea(), Colour3DPlotLayer::setOpaque(), TimeInstantLayer::setPlotStyle(), SliceLayer::setPlotStyle(), TimeValueLayer::setPlotStyle(), RegionLayer::setPlotStyle(), SliceLayer::setSamplingMode(), WaveformLayer::setScale(), TimeValueLayer::setShowDerivative(), WaveformLayer::setShowMeans(), SpectrumLayer::setShowPeaks(), Colour3DPlotLayer::setSmooth(), SliceLayer::setThreshold(), SpectrogramLayer::setThreshold(), WaveformLayer::setUseGreyscale(), NoteLayer::setVerticalScale(), RegionLayer::setVerticalScale(), TimeValueLayer::setVerticalScale(), FlexiNoteLayer::setVerticalScale(), Colour3DPlotLayer::setVerticalZoomStep(), SpectrumLayer::setWindowHopLevel(), SpectrogramLayer::setWindowHopLevel(), SpectrumLayer::setWindowSize(), SpectrogramLayer::setWindowSize(), SpectrumLayer::setWindowType(), SpectrogramLayer::setWindowType(), SpectrogramLayer::setZeroPadLevel(), and showLayer().

void Layer::layerNameChanged ( ) [signal]

Referenced by setObjectName().

void Layer::addMeasureRectToSet ( const MeasureRect r) [inline, protected]

Definition at line 588 of file Layer.h.

References layerMeasurementRectsChanged(), and m_measureRects.

Referenced by addMeasurementRect().

void Layer::deleteMeasureRectFromSet ( const MeasureRect r) [inline, protected]

Definition at line 593 of file Layer.h.

References layerMeasurementRectsChanged(), and m_measureRects.

void Layer::updateMeasureRectYCoords ( View v,
const MeasureRect r 
) const [protected, virtual]

Reimplemented in SpectrogramLayer.

Definition at line 510 of file Layer.cpp.

References Layer::MeasureRect::endY, Layer::MeasureRect::pixrect, and Layer::MeasureRect::startY.

Referenced by updateMeasurePixrects().

void Layer::setMeasureRectYCoord ( View v,
MeasureRect r,
bool  start,
int  y 
) const [protected, virtual]

Reimplemented in SpectrogramLayer.

Definition at line 518 of file Layer.cpp.

References Layer::MeasureRect::endY, and Layer::MeasureRect::startY.

Referenced by setMeasureRectFromPixrect().

Layer::MeasureRectSet::const_iterator Layer::findFocusedMeasureRect ( QPoint  focusPoint) const [protected]

Member Data Documentation

Definition at line 600 of file Layer.h.

Referenced by measureDrag(), measureEnd(), measureStart(), and paintMeasurementRects().

bool Layer::m_haveDraggingRect [protected]

Definition at line 601 of file Layer.h.

Referenced by measureDrag(), measureEnd(), measureStart(), and paintMeasurementRects().

bool Layer::m_haveCurrentMeasureRect [mutable, protected]
QPoint Layer::m_currentMeasureRectPoint [mutable, protected]

Definition at line 603 of file Layer.h.

Referenced by deleteCurrentMeasureRect(), and paintMeasurementRects().

QMutex Layer::m_dormancyMutex [mutable, private]

Definition at line 623 of file Layer.h.

Referenced by isLayerDormant(), and setLayerDormant().

std::map<const void *, bool> Layer::m_dormancy [mutable, private]

Definition at line 624 of file Layer.h.

Referenced by isLayerDormant(), and setLayerDormant().


The documentation for this class was generated from the following files: