A momentary button is a button that lets you set the value of a parameter to its "on" value when pressed, otherwise its "off" value. More...

#include <MomentaryButtonView.h>

Inherits CustomDiscreteControlView.

Classes
class	Creator

Public Member Functions
void	draw (CDrawContext *iContext) override
	Calls `drawOn()` or `drawOff()` depending on the state (takes into account the `inverse` attribute) More...

virtual void	drawOff (CDrawContext *iContext)
	called to display the "off" state (can be overriden) More...

virtual void	drawOn (CDrawContext *iContext)
	called to display the "on" state (can be overriden) More...

int32	getComputedOffStep () const
	Computes "off" step based on value of `off-step` attribute. More...

int32	getComputedOnStep () const
	Computes "on" step based on value of `on-step` attribute. More...

CColor const &	getDisabledColor () const
	When no image is provided and the control is disabled, this color is used instead. More...

BitmapPtr	getImage () const
	The image to use to draw the button. More...

bool	getImageHasDisabledState () const
	Flag to determine whether the image contains a disabled state (3 frames) or not (2 frames) More...

bool	getInverse () const
	Inverses the meaning of "on" and "off" in regards to drawing the view/image. More...

int32	getOffStep () const
	Maps to the "off" value unless it is set to its default (-1) value in which case it maps to `0` (should be `-1` or a value in `[0, stepCount]`). More...

CColor const &	getOnColor () const
	When no image is provided, `back-color` is used for the "off" state and `on-color` for the "on" state (draws a rectangle with this color). More...

int32	getOnStep () const
	Maps to the "on" value unless it is set to its default (-1) value in which case it maps to `getStepCount()` (should be `-1` or a value in `[0, stepCount]`). More...

bool	isHeld () const

bool	isOff () const

bool	isOn () const

	MomentaryButtonView (const CRect &iSize)

int32_t	onKeyDown (VstKeyCode &keyCode) override

int32_t	onKeyUp (VstKeyCode &keyCode) override

CMouseEventResult	onMouseCancel () override

CMouseEventResult	onMouseDown (CPoint &where, const CButtonState &buttons) override

CMouseEventResult	onMouseUp (CPoint &where, const CButtonState &buttons) override

void	setDisabledColor (CColor const &iColor)

void	setImage (BitmapPtr iImage)
	Attribute `button-image`. More...

void	setImageHasDisabledState (bool iValue)

void	setInverse (bool iInverse)

void	setOffStep (int32 iStep)
	Attribute `off-step` More...

void	setOnColor (CColor const &iColor)
	Attribute `on-color` (the "off" color is the back color...) More...

void	setOnStep (int32 iStep)
	Attribute `on-step` More...

bool	sizeToFit () override

Public Member Functions inherited from CustomDiscreteControlView
	CustomDiscreteControlView (const CRect &iSize)

int32	getStepCount () const
	The number of steps of the managed discrete parameter as specified by this view. More...

void	registerParameters () override
	Registers the optional parameter using `getControlTag()` as its id. More...

void	setStepCount (int32 iStepCount)

Public Member Functions inherited from TCustomControlView< int32 >
int32	getControlValue () const
	Returns the value of the managed parameter (properly typed) More...

void	registerParameters () override
	Registers the optional parameter using `getControlTag()` as its id. More...

virtual void	setControlValue (int32 const &iControlValue)
	Sets the value of the managed parameter to the provided value. More...

	TCustomControlView (const CRect &iSize)

Public Member Functions inherited from CustomControlView
	CustomControlView (const CRect &iSize)

ParamID	getControlTag () const
	Id of the parameter that this view manages. More...

virtual void	setControlTag (ParamID iTag)

Public Member Functions inherited from CustomView
void	afterApplyAttributes () override
	Handles the lifecycle behavior getting triggered once all the attributes have been set (which usually happens after the XML file (uidesc) has been read/processed, or when you modify attributes in the VSTGUI Editor). More...

	CustomView (const CRect &iSize)

	CustomView (const CustomView &c)=delete

void	draw (CDrawContext *iContext) override
	The basic draw method which will erase the background with the back color. More...

virtual void	drawBackColor (CDrawContext *iContext)
	Draws the back color (if not set to transparent) More...

void	drawStyleChanged ()
	Called when the draw style is changed (simply marks the view dirty) More...

CColor const &	getBackColor () const
	The back color (background) for the view. More...

TagID	getCustomViewTag () const
	The tag associated to this custom view. More...

bool	getEditorMode () const
	A flag whose purpose is to render/log information during development when the flag is set to `true`. More...

void	markDirty ()
	Marks this view dirty which will (at the appropriate time in the rendering lifecycle) trigger a call to `draw()` More...

void	onParameterChange (ParamID iParamID) override
	Callback when a parameter changes. More...

void	setBackColor (CColor const &iColor)

void	setCustomViewTag (TagID iTag)

void	setEditorMode (bool iEditorMode)

Public Member Functions inherited from ParamAware
virtual void	initState (GUIState *iGUIState)
	Called during initialization. More...

void	invokeAll ()
	Invoke all (currently) registered callbacks and `onParameterChange()` (if registered). More...

IGUIParam	registerBaseCallback (ParamID iParamID, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback)
	Registers a callback for the "base" param for the most generic use case. More...

IGUIParam	registerBaseCallback (ParamID iParamID, Parameters::ChangeCallback1< IGUIParam > iChangeCallback, bool iInvokeCallback)
	Registers a callback for the "base" param for the most generic use case. More...

IGUIParam	registerBaseParam (ParamID iParamID, bool iSubscribeToChanges=true)
	Registers the "base" param for the most generic use case but as a result is fairly limited and mainly gives access to the string representation of the param. More...

GUIRawVstParam	registerCallback (RawVstParam const &iParamDef, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Registers a raw parameter (no conversion). More...

GUIRawVstParam	registerCallback (RawVstParam const &iParamDef, Parameters::ChangeCallback1< GUIRawVstParam > iChangeCallback, bool iInvokeCallback=false)
	Registers a raw parameter (no conversion). More...

template<typename T >
GUIVstParam< T >	registerCallback (VstParam< T > const &iParamDef, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Convenient call to register a callback for the Vst param simply by using its description (accessible in state-aware views via `fParams->fMyParam`). More...

template<typename T >
GUIVstParam< T >	registerCallback (VstParam< T > const &iParamDef, Parameters::ChangeCallback1< GUIVstParam< T >> iChangeCallback, bool iInvokeCallback=false)
	Convenient call to register a callback for the Vst param simply by using its description (accessible in state-aware views via `fParams->fMyParam`). More...

template<typename T >
GUIJmbParam< T >	registerCallback (JmbParam< T > const &iParamDef, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Convenient call to register a callback for the Jmb param simply by using its description (accessible in state-aware views via `fParams->fMyParam`). More...

template<typename T >
GUIJmbParam< T >	registerCallback (JmbParam< T > const &iParamDef, Parameters::ChangeCallback1< GUIJmbParam< T >> iChangeCallback, bool iInvokeCallback=false)
	Convenient call to register a callback for the Jmb param simply by using its description (accessible in state-aware views via `fParams->fMyParam`). More...

template<typename T >
GUIJmbParam< T >	registerCallback (GUIJmbParam< T > &iParam, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Convenient call to register a callback for the Jmb param simply by using the param from the state (accessible in state-aware views via `fState->fMyParam`). More...

template<typename T >
GUIJmbParam< T >	registerCallback (GUIJmbParam< T > &iParam, Parameters::ChangeCallback1< GUIJmbParam< T >> iChangeCallback, bool iInvokeCallback=false)
	Convenient call to register a callback for the Jmb param simply by using the param from the state (accessible in state-aware views via `fState->fMyParam`). More...

template<typename T >
GUIJmbParam< T >	registerJmbCallback (ParamID iParamID, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Registers a callback for the Jmb param by its id and return the wrapper to the param. More...

template<typename T >
GUIJmbParam< T >	registerJmbCallback (ParamID iParamID, Parameters::ChangeCallback1< GUIJmbParam< T >> iChangeCallback, bool iInvokeCallback=false)
	Registers a callback for the Jmb param by its id and return the wrapper to the param. More...

template<typename T >
GUIJmbParam< T >	registerJmbParam (ParamID iParamID, bool iSubscribeToChanges=true)
	Registers the Jmb param by its id and return the wrapper to the param. More...

template<typename T >
GUIOptionalParam< T >	registerOptionalCallback (ParamID iParamID, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Registers an optional parameter which handles Vst, Jmb or no parameter at all. More...

template<typename T >
GUIOptionalParam< T >	registerOptionalCallback (ParamID iParamID, Parameters::ChangeCallback1< GUIOptionalParam< T >> iChangeCallback, bool iInvokeCallback=false)
	Registers an optional parameter which handles Vst, Jmb or no parameter at all. More...

GUIOptionalParam< int32 >	registerOptionalDiscreteCallback (ParamID iParamID, int32 iStepCount, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Registers an optional discrete parameter which handles Vst, Jmb or no parameter at all. More...

GUIOptionalParam< int32 >	registerOptionalDiscreteCallback (ParamID iParamID, int32 iStepCount, Parameters::ChangeCallback1< GUIOptionalParam< int32 >> iChangeCallback, bool iInvokeCallback=false)
	Registers an optional discrete parameter which handles Vst, Jmb or no parameter at all. More...

GUIOptionalParam< int32 >	registerOptionalDiscreteParam (ParamID iParamID, int32 iStepCount, bool iSubscribeToChanges=true)
	Registers an optional discrete parameter which handles Vst, Jmb or no parameter at all. More...

template<typename T >
GUIOptionalParam< T >	registerOptionalParam (ParamID iParamID, bool iSubscribeToChanges=true)
	Registers an optional parameter which handles Vst, Jmb or no parameter at all. More...

GUIRawVstParam	registerParam (RawVstParam const &iParamDef, bool iSubscribeToChanges=true)
	Registers a raw parameter (no conversion). More...

template<typename T >
GUIVstParam< T >	registerParam (VstParam< T > const &iParamDef, bool iSubscribeToChanges=true)
	Convenient call to register a Vst param simply by using its description (accessible in state-aware views via `fParams->fMyParam`). More...

template<typename T >
GUIJmbParam< T >	registerParam (JmbParam< T > const &iParamDef, bool iSubscribeToChanges=true)
	Convenient call to register a Jmb param simply by using its description (accessible in state-aware views via `fParams->fMyParam`). More...

template<typename T >
GUIJmbParam< T >	registerParam (GUIJmbParam< T > &iParam, bool iSubscribeToChanges=true)
	Convenient call to register a Jmb param simply by using the param from the state (accessible in state-aware views via `fState->fMyParam`). More...

GUIRawVstParam	registerRawVstCallback (ParamID iParamID, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Registers a raw parameter (no conversion) The callback will be invoked when the parameter changes. More...

GUIRawVstParam	registerRawVstCallback (ParamID iParamID, Parameters::ChangeCallback1< GUIRawVstParam > iChangeCallback, bool iInvokeCallback=false)
	Registers a raw parameter (no conversion) The callback will be invoked when the parameter changes. More...

GUIRawVstParam	registerRawVstParam (ParamID iParamID, bool iSubscribeToChanges=true)
	Registers a raw parameter (no conversion) `onParameterChange()` will be called on changes (if `iSubscribeToChanges` is set to `true`). More...

GUIVstParam< bool >	registerVstBooleanParam (ParamID iParamID, bool iSubscribeToChanges=true)

template<typename T >
GUIVstParam< T >	registerVstCallback (ParamID iParamID, Parameters::ChangeCallback iChangeCallback, bool iInvokeCallback=false)
	Register a callback for a Vst parameter simply given its id The callback will be invoked when the parameter changes. More...

template<typename T >
GUIVstParam< T >	registerVstCallback (ParamID iParamID, Parameters::ChangeCallback1< GUIVstParam< T >> iChangeCallback, bool iInvokeCallback=false)
	Register a callback for a Vst parameter simply given its id The callback will be invoked when the parameter changes. More...

template<typename T >
GUIVstParam< T >	registerVstParam (ParamID iParamID, bool iSubscribeToChanges=true)
	Register a Vst parameter simply given its id `onParameterChange()` will be called on changes (if `iSubscribeToChanges` is set to `true`). More...

GUIVstParam< Percent >	registerVstPercentParam (ParamID iParamID, bool iSubscribeToChanges=true)

void	unregisterAll ()
	Unregisters all parameters. More...

bool	unregisterParam (ParamID iParamID)
	Removes the registration of the provided param (closing the connection/stopping to listen) More...

GUIRawVstParam	unregisterParam (GUIRawVstParam const &iParam)
	Removes the registration of the provided param (closing the connection/stopping to listen) More...

template<typename T >
GUIVstParam< T >	unregisterParam (GUIVstParam< T > const &iParam)
	Removes the registration of the provided param (closing the connection/stopping to listen) More...

template<typename T >
GUIJmbParam< T >	unregisterParam (GUIJmbParam< T > const &iParam)
	Removes the registration of the provided param (closing the connection/stopping to listen) More...

virtual	~ParamAware ()

Protected Attributes
CColor	fDisabledColor {kBlackCColor}

bool	fHeld {false}
	State of the button (`true` for held, `false` for released) More...

BitmapSPtr	fImage {nullptr}

bool	fImageHasDisabledState {false}

bool	fInverse {false}

int32	fOffStep {-1}

CColor	fOnColor {kRedCColor}

int32	fOnStep {-1}

Protected Attributes inherited from CustomDiscreteControlView
int32	fStepCount {-1}

Protected Attributes inherited from TCustomControlView< int32 >
GUIOptionalParam< int32 >	fControlParameter

Protected Attributes inherited from CustomControlView
ParamID	fControlTag {UNDEFINED_PARAM_ID}

Protected Attributes inherited from CustomView
CColor	fBackColor

ParamID	fTag

Protected Attributes inherited from ParamAware
std::unique_ptr< GUIParamCxMgr >	fParamCxMgr {}

Additional Inherited Members
Public Types inherited from TCustomControlView< int32 >
using	Creator = CustomViewCreator< TCustomControlView< int32 >, CustomControlView >

Protected Member Functions inherited from CustomView
void	sizeToFit (CCoord iWidth, CCoord iHeight)
	Convenient call to size to fit this view according to the and height provided. More...

bool	sizeToFit (BitmapPtr iBitmap, int iFrameCount=1)
	Convenient call to size to fit this view to match the bitmap. More...

Detailed Description

A momentary button is a button that lets you set the value of a parameter to its "on" value when pressed, otherwise its "off" value.

This view is designed to handle parameters which are backed by a bool representation but it works for any parameter (both Vst and Jmb) that is (or can be interpreted as) a discrete parameter.

Note: This view defines the "on" state as being the opposite of the "off" state and so the "off" state is the one being checked against the off value (otherwise we could end up in a situation where both isOn and isOff are true...). The consequence is that the underlying parameter might have a value that is neither the "off" value nor the "on" value, but for the sake of this view it will be treated as "on" (similarly to C/C++ where 0 is false and any non-zero is true).

In addition to the attributes exposed by CustomDiscreteControlView, this class exposes the following attributes:

Attribute Description

on-step Maps to the "on" value unless it is set to its default (-1) value in which case it maps to getStepCount() (should be -1 or a value in [0, stepCount]).

off-step Maps to the "off" value unless it is set to its default (-1) value in which case it maps to 0 (should be -1 or a value in [0, stepCount]).

on-color When no image is provided, back-color is used for the "off" state and on-color for the "on" state (draws a rectangle with this color).

disabled-color When no image is provided and the control is disabled, this color is used instead.

button-image

The image to use to draw the button. If button-image-has-disabled-state is true then the image should contain the following 3 frames (each is of size image height / 3):

y	frame
0	the button in its disabled state
1 * image height / 3	the button in its "off" state
2 * image height / 3	the button in its "on" state

Example: 3 frames example

If button-image-has-disabled-state is false then the image should contain the following 2 frames (each is of size image height / 2):

y	frame
0	the button in its "off" state
image height / 2	the button in its "on" state

Example: 2 frames example

button-image-has-disabled-state

Flag to determine whether the image contains a disabled state (3 frames) or not (2 frames)

See also: getImage() for details on the impact of this flag on the image

inverse Inverses the meaning of "on" and "off" in regards to drawing the view/image.

See also: CustomDiscreteControlView for details on discrete parameters and the usage of step-count

Constructor & Destructor Documentation

◆ MomentaryButtonView()

MomentaryButtonView ( const CRect & iSize )

inlineexplicit

Member Function Documentation

◆ draw()

void draw ( CDrawContext * iContext )

override

Calls drawOn() or drawOff() depending on the state (takes into account the inverse attribute)

◆ drawOff()

void drawOff ( CDrawContext * iContext )

virtual

called to display the "off" state (can be overriden)

◆ drawOn()

void drawOn ( CDrawContext * iContext )

virtual

called to display the "on" state (can be overriden)

◆ getComputedOffStep()

int32 getComputedOffStep ( ) const

inline

Computes "off" step based on value of off-step attribute.

◆ getComputedOnStep()

int32 getComputedOnStep ( ) const

Computes "on" step based on value of on-step attribute.

◆ getDisabledColor()

CColor const& getDisabledColor ( ) const

inline

When no image is provided and the control is disabled, this color is used instead.

◆ getImage()

BitmapPtr getImage ( ) const

inline

The image to use to draw the button.

If button-image-has-disabled-state is true then the image should contain the following 3 frames (each is of size image height / 3):

y	frame
0	the button in its disabled state
1 * image height / 3	the button in its "off" state
2 * image height / 3	the button in its "on" state

Example: 3 frames example

If button-image-has-disabled-state is false then the image should contain the following 2 frames (each is of size image height / 2):

y	frame
0	the button in its "off" state
image height / 2	the button in its "on" state

Example: 2 frames example

◆ getImageHasDisabledState()

bool getImageHasDisabledState ( ) const

inline

Flag to determine whether the image contains a disabled state (3 frames) or not (2 frames)

See also: getImage() for details on the impact of this flag on the image

◆ getInverse()

bool getInverse ( ) const

inline

Inverses the meaning of "on" and "off" in regards to drawing the view/image.

◆ getOffStep()

int32 getOffStep ( ) const

inline

Maps to the "off" value unless it is set to its default (-1) value in which case it maps to 0 (should be -1 or a value in [0, stepCount]).

◆ getOnColor()

CColor const& getOnColor ( ) const

inline

When no image is provided, back-color is used for the "off" state and on-color for the "on" state (draws a rectangle with this color).

◆ getOnStep()

int32 getOnStep ( ) const

void setImage ( BitmapPtr iImage )

inline

Attribute button-image.

◆ setImageHasDisabledState()

void setImageHasDisabledState ( bool iValue )

inline

bool sizeToFit ( )

override

Member Data Documentation

◆ fDisabledColor

CColor fDisabledColor {kBlackCColor}

protected

◆ fHeld

bool fHeld {false}

int32 fOnStep {-1}

protected

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

pongasoft/VST/GUI/Views/MomentaryButtonView.h
pongasoft/VST/GUI/Views/MomentaryButtonView.cpp

Classes

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MomentaryButtonView()

Member Function Documentation

◆ draw()

◆ drawOff()

◆ drawOn()

◆ getComputedOffStep()

◆ getComputedOnStep()

◆ getDisabledColor()

◆ getImage()

◆ getImageHasDisabledState()

◆ getInverse()

◆ getOffStep()

◆ getOnColor()

◆ getOnStep()

◆ isHeld()

◆ isOff()

◆ isOn()

◆ onKeyDown()

◆ onKeyUp()

◆ onMouseCancel()

◆ onMouseDown()

◆ onMouseUp()

◆ setDisabledColor()

◆ setImage()

◆ setImageHasDisabledState()

◆ setInverse()

◆ setOffStep()

◆ setOnColor()

◆ setOnStep()

◆ sizeToFit()

Member Data Documentation

◆ fDisabledColor

◆ fHeld

◆ fImage

◆ fImageHasDisabledState

◆ fInverse

◆ fOffStep

◆ fOnColor

◆ fOnStep