SegmentSlider Class Reference

This class implements a slider widget for representing a video segment. More...

#include <SegmentSlider.hpp>

List of all members.

Public Slots
void	editSegment ()
	Invoke an edit dialog on the video segment.
void	removeSegment ()
	Remove the current video segment.
void	segmentLevelChange (int level)
	The level spin box value changed.
void	setSliderFromMediaTime (const MP7Time &time)
	Update the slider's position according to the current media time.
void	updateSegmentDisplay ()
	Update display of markers and buddy labels according to the MP7VideoSegment.
void	gotoPrevSibling ()
	Make the previous generalized sibling segment the current one (if available).
void	gotoNextSibling ()
	Make the next generalized sibling segment the current one (if available).
Signals
void	segmentChanged (MP7ListViewItem *segmentRoot)
	The current segment has changed.
void	sliderMoved (const MP7Time &time)
	The slider was moved by the user.
Public Member Functions
	SegmentSlider (QWidget *parent, const char *name=NULL)
	Constructor.
	~SegmentSlider ()
	Destructor.
void	setSegment (const MP7VideoSegment &segment, bool emitSignal=true)
	Set the video segment represented by this slider and update the display accordingly.
MP7VideoSegment	getSegment () const
	Return the video segment represented by this slider.
void	setTitleLabel (QLabel *label)
	Set the segment title buddy label.
void	setStartTimeLabel (QLabel *label)
	Set the segment start time buddy label.
void	setEndTimeLabel (QLabel *label)
	Set the segment end time buddy label.
void	setLevelSpinBox (QSpinBox *spinbox)
	Set the segment level spinbox buddy widget.
void	setPrevSiblingButton (QButton *button)
	Set the previous sibling buddy button.
void	setNextSiblingButton (QButton *button)
	Set the next sibling buddy button.
void	enableSegmentZooming (bool on)
	Enable or disable segment zooming.
Protected Slots
void	emitSliderMovedSignal ()
	Emit a sliderMoved(const MP7Time &) signal.
Protected Member Functions
void	setMarker (const MP7VideoSegment &subsegment)
	Set a segment marker corresponding to the given subsegment.
void	removeMarker (int value)
	Remove the segment marker at the position given by value.
void	removeMarker (const MP7Time &time)
	Remove the segment marker at the given media time point.
void	repositionMarkers ()
	Re-position segment markers and activate segment tool-tips.
int	timeToValue (const MP7Time &time) const
	Convert time point to slider value.
MP7Time	valueToTime (int value) const
	Convert slider value to time point.
int	durationToValue (const MP7Time &time) const
	Convert duration to slider value.
virtual void	resizeEvent (QResizeEvent *e)
	Resize event handler.
virtual void	mouseDoubleClickEvent (QMouseEvent *e)
	Double-click event handler.

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Detailed Description

This class implements a slider widget for representing a video segment.

It allows segment markers to be set in media time units.

Author:

Mario Taschwer

Version:

Id

SegmentSlider.hpp,v 1.4 2004/09/24 13:15:09 mtaschwer Exp

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Constructor & Destructor Documentation

SegmentSlider::SegmentSlider (  QWidget *  parent, const char *  name = NULL )

Constructor. Initializes this slider with horizontal orientation and range [0..100].

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Member Function Documentation

void SegmentSlider::editSegment (   )  [slot]

Invoke an edit dialog on the video segment. A segmentChanged(MP7ListViewItem *) signal is emitted. See also: MP7VideoSegment::edit()

void SegmentSlider::enableSegmentZooming (  bool  on  )

Enable or disable segment zooming. Per default, segment zooming is enabled. See also: mouseDoubleClickEvent(QMouseEvent *)

void SegmentSlider::gotoNextSibling (   )  [slot]

Make the next generalized sibling segment the current one (if available). Two nodes of a tree are generalized siblings if they have the same distance to the root node.

void SegmentSlider::gotoPrevSibling (   )  [slot]

Make the previous generalized sibling segment the current one (if available). Two nodes of a tree are generalized siblings if they have the same distance to the root node.

virtual void SegmentSlider::mouseDoubleClickEvent (  QMouseEvent *  e  )  [protected, virtual]

Double-click event handler. If segment zooming is enabled, double-clicking this widget will zoom into the subsegment corresponding to the location of the double-click event. See also: enableSegmentZooming(bool)

void SegmentSlider::removeSegment (   )  [slot]

Remove the current video segment. The parent segment becomes the current one. The top-level segment cannot be removed.

void SegmentSlider::repositionMarkers (   )  [protected]

Re-position segment markers and activate segment tool-tips. The marker values are not modified.

void SegmentSlider::segmentChanged (  MP7ListViewItem *  segmentRoot  )  [signal]

The current segment has changed. The root element of the new segment is emitted.

void SegmentSlider::segmentLevelChange (  int  level  )  [slot]

The level spin box value changed. If the new value is less than the current segment level and segment zooming is enabled, this slider will zoom-out to the video segment of the specified level.

void SegmentSlider::setMarker (  const MP7VideoSegment &  subsegment  )  [protected]

Set a segment marker corresponding to the given subsegment. The slider will show a tool-tip with the segment title in the area corresponding to the segment duration. You need to call repositionMarkers() afterwards to display the new marker.

void SegmentSlider::setSegment (  const MP7VideoSegment &  segment, bool  emitSignal = true )

Set the video segment represented by this slider and update the display accordingly. If emitSignal is true and segment is not equal to the current segment, a segmentChanged(MP7ListViewItem *) signal will be emitted.

void SegmentSlider::sliderMoved (  const MP7Time &  time  )  [signal]

The slider was moved by the user. The time represented by the new slider position is emitted.

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

• SegmentSlider.hpp

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