Inheritance diagram for ACG::QtWidgets::QtWheel:

Public Types
enum	Orientation { Horizontal, Vertical }
	Orientation of the widget.

Signals
void	angleChangedTo (double _angle)

void	angleChangedBy (double _angle)

void	gearUp ()

void	gearDown ()
	Like gearUp() but the value of gear() halves.

void	hideWheel ()
	Emitted when the wheel will be hidden by the context menu.

Public Member Functions
	QtWheel (QWidget _parent=0, const char _name=0, Orientation _orientation=Horizontal)
	Constructor.

virtual	~QtWheel ()
	Destructor.

int	ticks () const
	get number of ticks on the wheel

void	setTicks (int _number)
	set `_number` of ticks on the wheel (default: 36)

double	angle () const
	get current angle of the wheel (radiants, unbounded, cf. clip())

void	setAngle (double _angle)
	set current angle of the wheel (radiants, unbounded, cf. clip())

double	diffAngle () const

bool	marker () const
	Are there markers on the wheel?

void	setMarker (bool _b)
	enable/disable markers on the wheel

Orientation	orientation () const
	get orientation

void	setOrientation (Orientation _orientation)
	set orientation

bool	draggingWheel () const
	Is the user currently dragging the wheel whith the mouse?

void	setTracking (bool _b)

bool	tracking () const
	Is tracking on?

void	setGear (double _g)

double	gear () const
	How fast does angle() change when the wheel is turned? (see above)

virtual QSizePolicy	sizePolicy () const
	reimplemented

virtual QSize	sizeHint () const
	reimplemented

Static Public Member Functions
static double	clip (double _angle)

static double	deg (double _angle)
	maps `_angle` from radiants to degrees (works also for clip()ped angles)

Protected Member Functions
virtual void	mousePressEvent (QMouseEvent *)
	reimplemented

virtual void	mouseReleaseEvent (QMouseEvent *)
	reimplemented

virtual void	mouseMoveEvent (QMouseEvent *)
	reimplemented

virtual void	mouseDoubleClickEvent (QMouseEvent *)
	reimplemented

virtual void	keyPressEvent (QKeyEvent *)
	reimplemented

virtual void	keyReleaseEvent (QKeyEvent *)
	reimplemented

virtual void	resizeEvent (QResizeEvent *)
	reimplemented

virtual void	paintEvent (QPaintEvent *)
	reimplemented More...

virtual void	drawContents (QPainter *)
	reimplemented

virtual void	redrawPixmap ()
	draw wheel to pixmap (double buffering)

Private Slots
void	slotCustomContextMenuRequested (const QPoint &pos)

Private Member Functions
	QtWheel (const QtWheel &)
	Copy constructor. Never used!

QtWheel &	operator= (const QtWheel &)
	Assignment operator. Never used!

double	turn (const QPoint &_pos)

void	updateMenu ()
	updates the ticks of the menu

void	shrinkRect (QRect &, int, int)
	expands a rectangle in x/y direction

Private Attributes
double	angle_
	current angle of the wheel

double	lastAngle_
	last angle, depends on tracking_

int	size_
	size of wheel in pixels

double	gear_
	speed of revolution

int	gearShift_
	click-shifted gear by 2^gearShift_

Orientation	orientation_
	orientation of the widget

int	ticks_
	number of ticks on the wheel

bool	marker_
	should ticks be marked by colors?

QPoint	pos_
	recent mouse position

bool	dragging_
	currently dragging the slider?

bool	tracking_
	tracking on?

QPalette	palette_
	color group

QPixmap	pixmap_
	pixmap of the wheel

Detailed Description

Definition at line 107 of file QtWheel.hh.

Member Function Documentation

void ACG::QtWidgets::QtWheel::angleChangedBy ( double _angle )

signal

The angle chaned by the relative _angle (cf. clip()).

Note: Do not use this signal together with angleChangedBy()! The reason for this is that you cannot be sure in which order the you get the signals!

If you need both values the angle and the relative difference then use this signal and angle() or angleChangedTo() and diffAngle() respectively!

void ACG::QtWidgets::QtWheel::angleChangedTo ( double _angle )

signal

The angle changed to the absolute _angle (cf. clip()). Note: Do not use together with angleChangedBy() (see there)!

double ACG::QtWidgets::QtWheel::clip ( double _angle )

static

Clips _angle to range [0,2pi[. All angle()s provided by this widget are unbounded in a sense that a full turn of the wheel is 2pi not 0. As a consequence two full turns are 4pi, etc.

This methods clips the angle again [0,2pi[

See also: deg()

Definition at line 443 of file QtWheel.cc.

double ACG::QtWidgets::QtWheel::diffAngle ( ) const

inline

Get difference angle. You may call this method from a slot connected to angleChangedTo() and obtain the difference angle (equal to the argument to angleChangedBy()).

Definition at line 150 of file QtWheel.hh.

void ACG::QtWidgets::QtWheel::gearUp ( )

signal

The gear() has been "shifted" by double clicking the widget. Up-shifting will double the value of gear(). The signal is emitted after gear() has been changed.

void ACG::QtWidgets::QtWheel::paintEvent ( QPaintEvent * _e )

protectedvirtual

reimplemented

Todo:: : bitBlt(this,r.left(),r.top(),pixmap_);

Definition at line 283 of file QtWheel.cc.

void ACG::QtWidgets::QtWheel::setGear ( double _g )

inline

How fast does angle() changed when the wheel is turned? The default setting is 1.0. Then angle() will be changed by pi (180 degrees) when dragging the wheel from one end of the widget to the other. In general this angular difference will be multiplied by gear(), i.e. for values >1,0 the angle changes faster.

Definition at line 186 of file QtWheel.hh.

void ACG::QtWidgets::QtWheel::setTracking ( bool _b )

inline

Enables wheel tracking (default: true)

If tracking is enabled, then the QtWheel emits signals whenever the it is dragged. Otherwise signals are emitted only when a dragging process is finished.

Definition at line 175 of file QtWheel.hh.

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

ACG/QtWidgets/QtWheel.hh
ACG/QtWidgets/QtWheel.cc

Public Types

Signals

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Slots

Private Member Functions

Private Attributes

Detailed Description

Member Function Documentation