ImageBaseKnob< ImageType > Class Template Reference

#include <ImageBaseWidgets.hpp>

Inheritance diagram for ImageBaseKnob< ImageType >:

Classes
class	Callback

Public Member Functions
	ImageBaseKnob (Widget *parentWidget, const ImageType &image, Orientation orientation=Vertical) noexcept
	ImageBaseKnob (const ImageBaseKnob &imageKnob)
ImageBaseKnob &	operator= (const ImageBaseKnob &imageKnob)
void	setCallback (Callback *callback) noexcept
void	setImageLayerCount (uint count) noexcept
void	setRotationAngle (int angle)
bool	setValue (float value, bool sendCallback=false) noexcept override
Public Member Functions inherited from SubWidget
	SubWidget (Widget *parentWidget)
	~SubWidget () override
template<typename T >
bool	contains (T x, T y) const noexcept
template<typename T >
bool	contains (const Point< T > &pos) const noexcept
int	getAbsoluteX () const noexcept
int	getAbsoluteY () const noexcept
Point< int >	getAbsolutePos () const noexcept
Rectangle< int >	getAbsoluteArea () const noexcept
Rectangle< uint >	getConstrainedAbsoluteArea () const noexcept
void	setAbsoluteX (int x) noexcept
void	setAbsoluteY (int y) noexcept
void	setAbsolutePos (int x, int y) noexcept
void	setAbsolutePos (const Point< int > &pos) noexcept
Point< int >	getMargin () const noexcept
void	setMargin (int x, int y) noexcept
void	setMargin (const Point< int > &offset) noexcept
Widget *	getParentWidget () const noexcept
void	repaint () noexcept override
virtual void	toFront ()
void	setNeedsFullViewportDrawing (bool needsFullViewportForDrawing=true)
void	setNeedsViewportScaling (bool needsViewportScaling=true, double autoScaleFactor=0.0)
void	setSkipDrawing (bool skipDrawing=true)
Public Member Functions inherited from Widget
virtual	~Widget ()
bool	isVisible () const noexcept
void	setVisible (bool visible)
void	show ()
void	hide ()
uint	getWidth () const noexcept
uint	getHeight () const noexcept
const Size< uint >	getSize () const noexcept
void	setWidth (uint width) noexcept
void	setHeight (uint height) noexcept
void	setSize (uint width, uint height) noexcept
void	setSize (const Size< uint > &size) noexcept
uint	getId () const noexcept
void	setId (uint id) noexcept
Application &	getApp () const noexcept
Window &	getWindow () const noexcept
const GraphicsContext &	getGraphicsContext () const noexcept
TopLevelWidget *	getTopLevelWidget () const noexcept
Application &	getParentApp () const noexcept
Window &	getParentWindow () const noexcept
Public Member Functions inherited from KnobEventHandler
	KnobEventHandler (SubWidget *self)
	KnobEventHandler (SubWidget *self, const KnobEventHandler &other)
KnobEventHandler &	operator= (const KnobEventHandler &other)
float	getValue () const noexcept
float	getNormalizedValue () const noexcept
void	setDefault (float def) noexcept
void	setRange (float min, float max) noexcept
void	setStep (float step) noexcept
void	setUsingLogScale (bool yesNo) noexcept
Orientation	getOrientation () const noexcept
void	setOrientation (const Orientation orientation) noexcept
void	setCallback (Callback *callback) noexcept
bool	mouseEvent (const Widget::MouseEvent &ev)
bool	motionEvent (const Widget::MotionEvent &ev)
bool	scrollEvent (const Widget::ScrollEvent &ev)

Protected Member Functions
void	onDisplay () override
bool	onMouse (const MouseEvent &) override
bool	onMotion (const MotionEvent &) override
bool	onScroll (const ScrollEvent &) override
Protected Member Functions inherited from SubWidget
virtual void	onPositionChanged (const PositionChangedEvent &)
Protected Member Functions inherited from Widget
virtual bool	onKeyboard (const KeyboardEvent &)
virtual bool	onCharacterInput (const CharacterInputEvent &)
virtual void	onResize (const ResizeEvent &)
virtual bool	onSpecial (const SpecialEvent &)
Protected Member Functions inherited from KnobEventHandler
State	getState () const noexcept

Additional Inherited Members
Public Types inherited from KnobEventHandler
enum	Orientation { Horizontal , Vertical }
enum	State { kKnobStateDefault = 0x0 , kKnobStateHover = 0x1 , kKnobStateDragging = 0x2 , kKnobStateDraggingHover = kKnobStateDragging|kKnobStateHover }

Detailed Description

template<class ImageType>
class ImageBaseKnob< ImageType >

DGL Image Knob class.

This is a typical knob/dial, where the drawing comes from a pregenerated image "filmstrip". The knob's "filmstrip" image can be either horizontal or vertical, with the number of steps automatically based on the largest value (ie, horizontal if width>height, vertical if height>width). There are no different images for "hover" or "down" states.

The event logic for this knob comes from the KnobEventHandler class.

See also

CairoImageKnob, OpenGLImageKnob

Member Function Documentation

onDisplay()

template<class ImageType >

void ImageBaseKnob< ImageType >::onDisplay ( )

overrideprotectedvirtual

A function called to draw the widget contents.

Implements Widget.

onMouse()

template<class ImageType >

bool ImageBaseKnob< ImageType >::onMouse ( const MouseEvent &  )

overrideprotectedvirtual

A function called when a mouse button is pressed or released.

Returns

True to stop event propagation, false otherwise.

Reimplemented from Widget.

onMotion()

template<class ImageType >

bool ImageBaseKnob< ImageType >::onMotion ( const MotionEvent &  )

overrideprotectedvirtual

A function called when the pointer moves.

Returns

True to stop event propagation, false otherwise.

Reimplemented from Widget.

onScroll()

template<class ImageType >

bool ImageBaseKnob< ImageType >::onScroll ( const ScrollEvent &  )

overrideprotectedvirtual

A function called on scrolling (e.g. mouse wheel or track pad).

Returns

True to stop event propagation, false otherwise.

Reimplemented from Widget.

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

• dgl/ImageBaseWidgets.hpp