QmitkSliderLevelWindowWidget Class Reference

Provides a widget with a slider to change the level and window value of the current image. More...

#include <QmitkSliderLevelWindowWidget.h>

Inheritance diagram for QmitkSliderLevelWindowWidget:

Collaboration diagram for QmitkSliderLevelWindowWidget:

Public Member Functions
	QmitkSliderLevelWindowWidget (QWidget *parent=nullptr, Qt::WindowFlags f={})
	constructor More...
	~QmitkSliderLevelWindowWidget () override
	destructor More...
void	SetLevelWindowManager (mitk::LevelWindowManager *levelWindowManager)
	sets the manager who is responsible to collect and deliver changes on Level/Window More...
void	SetDataStorage (mitk::DataStorage *ds)
	sets the DataStorage which holds all image-nodes More...
mitk::LevelWindowManager *	GetManager ()
	returns the manager who is responsible to collect and deliver changes on Level/Window More...

Public Attributes
mitk::LevelWindow	m_LevelWindow
mitk::LevelWindowManager::Pointer	m_Manager
	manager who is responsible to collect and deliver changes on Level/Window More...

Protected Slots
void	HideScale ()
	Hide the scale if "Hide Scale" is selected in the context menu. More...
void	ShowScale ()
	Shows the scale if "Show Scale" is selected in the context menu. More...

Protected Member Functions
virtual void	Update ()
	recalculate the size and position of the slider bar More...
void	paintEvent (QPaintEvent *e) override
void	mouseMoveEvent (QMouseEvent *mouseEvent) override
void	enterEvent (QEnterEvent *event) override
void	mousePressEvent (QMouseEvent *mouseEvent) override
void	mouseReleaseEvent (QMouseEvent *mouseEvent) override
void	resizeEvent (QResizeEvent *event) override

Protected Attributes
QRect	m_Rect
QPoint	m_StartPos
bool	m_Resize
bool	m_Bottom
bool	m_MouseDown
bool	m_Leftbutton
bool	m_CtrlPressed
int	m_MoveHeight
bool	m_ScaleVisible
QRect	m_LowerBound
QRect	m_UpperBound
unsigned long	m_ObserverTag
bool	m_IsObserverTagSet
QFont	m_Font
QmitkLevelWindowWidgetContextMenu *	m_Contextmenu

Detailed Description

Provides a widget with a slider to change the level and window value of the current image.

This documentation actually refers to the QmitkLevelWindowWidget and is only put in this class due to technical issues (should be moved later).

The QmitkLevelWindowWidget is a kind of container for a QmitkSliderLevelWindowWidget (this is the cyan bar above the text input fields) and a QmitkLineEditLevelWindowWidget (with two text input fields). It holds a reference to a mitk::LevelWindowManager variable, which keeps the LevelWindowProperty of the currently selected image. Level/Window is manipulated by the text inputs and the Slider to adjust brightness/contrast of a single image. All changes on the slider or in the text input fields affect the current image by giving new values to LevelWindowManager. LevelWindowManager then sends a signal to tell other listeners about changes.

Which image is changed is determined by mitkLevelWindowManager. If m_AutoTopMost is true, always the topmost image in data tree (layer property) is affected by changes. The image which is affected by changes can also be changed by QmitkLevelWindowWidgetContextMenu, the context menu for QmitkSliderLevelWindowWidget and QmitkLineEditLevelWindowWidget. There you have the possibility to set a certain image or always the topmost image in the data tree (layer property) to be affected by changes.

The internal mitk::LevelWindow variable contains a range that is valid for a given image. It should not be possible to move the level/window parameters outside this range. The range can be changed and reset to its default values by QmitkLevelWindowWidgetContextMenu, the context menu for QmitkSliderLevelWindowWidget and QmitkLineEditLevelWindowWidget.

Now for the behaviour of the text inputs: The upper one contains the value of the level (brightness), the lower one shows the window (contrast).

The behaviour of the cyan bar is more obvious: the scale in the background shows the valid range. The cyan bar in front displays the currently selected level/window setting. You can change the level by dragging the bar with the left mouse button or clicking somewhere inside the scalerange with the left mouse button. The window is changed by moving the mouse on the upper or lower bound of the bar until the cursor becomes an vertical double-arrowed symbol. Then you can change the windowsize by clicking the left mouse button and move the mouse upwards or downwards. The bar becomes greater upwards as well as downwards. If you want to change the size of the window in only one direction you have to press the CTRL-key while doing the same as mentioned above. This information is also presented by a tooltip text when moving the mouse on the upper or lower bound of the bar.

Definition at line 77 of file QmitkSliderLevelWindowWidget.h.

Constructor & Destructor Documentation

QmitkSliderLevelWindowWidget()

QmitkSliderLevelWindowWidget::QmitkSliderLevelWindowWidget	(	QWidget *	parent = nullptr,
		Qt::WindowFlags	f = {}
	)

constructor

~QmitkSliderLevelWindowWidget()

QmitkSliderLevelWindowWidget::~QmitkSliderLevelWindowWidget ( )

override

destructor

Member Function Documentation

enterEvent()

void QmitkSliderLevelWindowWidget::enterEvent ( QEnterEvent *  event )

overrideprotected

GetManager()

mitk::LevelWindowManager* QmitkSliderLevelWindowWidget::GetManager

(

)

returns the manager who is responsible to collect and deliver changes on Level/Window

HideScale

void QmitkSliderLevelWindowWidget::HideScale ( )

protectedslot

Hide the scale if "Hide Scale" is selected in the context menu.

mouseMoveEvent()

void QmitkSliderLevelWindowWidget::mouseMoveEvent ( QMouseEvent *  mouseEvent )

overrideprotected

method implements the component behavior

checks if cursor is on upper or lower bound of slider bar and changes cursor symbol

checks if left mouse button is pressed and if CTRL is pressed and changes sliderbar in move-direction accordingly

mousePressEvent()

void QmitkSliderLevelWindowWidget::mousePressEvent ( QMouseEvent *  mouseEvent )

overrideprotected

registers events when a mousebutton is pressed

if leftbutton is pressed m_Leftbutton is set to true

also checks if CTRL is pressed and sets the bool variable m_CtrlPressed

mouseReleaseEvent()

void QmitkSliderLevelWindowWidget::mouseReleaseEvent ( QMouseEvent *  mouseEvent )

overrideprotected

sets the variable m_MouseDown to false

paintEvent()

void QmitkSliderLevelWindowWidget::paintEvent ( QPaintEvent *  e )

overrideprotected

repaint the slider and the scale

resizeEvent()

void QmitkSliderLevelWindowWidget::resizeEvent ( QResizeEvent *  event )

overrideprotected

causes an update of the sliderbar when resizing the window

SetDataStorage()

void QmitkSliderLevelWindowWidget::SetDataStorage

(

mitk::DataStorage *

ds

)

sets the DataStorage which holds all image-nodes

SetLevelWindowManager()

void QmitkSliderLevelWindowWidget::SetLevelWindowManager

(

mitk::LevelWindowManager *

levelWindowManager

)

sets the manager who is responsible to collect and deliver changes on Level/Window

ShowScale

void QmitkSliderLevelWindowWidget::ShowScale ( )

protectedslot

Shows the scale if "Show Scale" is selected in the context menu.

Update()

virtual void QmitkSliderLevelWindowWidget::Update ( )

protectedvirtual

recalculate the size and position of the slider bar

Member Data Documentation

m_Bottom

bool QmitkSliderLevelWindowWidget::m_Bottom

protected

Definition at line 124 of file QmitkSliderLevelWindowWidget.h.

m_Contextmenu

QmitkLevelWindowWidgetContextMenu* QmitkSliderLevelWindowWidget::m_Contextmenu

protected

data structure which creates the context menu for QmitkLineEditLevelWindowWidget

Definition at line 140 of file QmitkSliderLevelWindowWidget.h.

m_CtrlPressed

bool QmitkSliderLevelWindowWidget::m_CtrlPressed

protected

Definition at line 127 of file QmitkSliderLevelWindowWidget.h.

m_Font

QFont QmitkSliderLevelWindowWidget::m_Font

protected

Definition at line 135 of file QmitkSliderLevelWindowWidget.h.

m_IsObserverTagSet

bool QmitkSliderLevelWindowWidget::m_IsObserverTagSet

protected

Definition at line 133 of file QmitkSliderLevelWindowWidget.h.

m_Leftbutton

bool QmitkSliderLevelWindowWidget::m_Leftbutton

protected

Definition at line 126 of file QmitkSliderLevelWindowWidget.h.

m_LevelWindow

mitk::LevelWindow QmitkSliderLevelWindowWidget::m_LevelWindow

Definition at line 97 of file QmitkSliderLevelWindowWidget.h.

m_LowerBound

QRect QmitkSliderLevelWindowWidget::m_LowerBound

protected

Definition at line 130 of file QmitkSliderLevelWindowWidget.h.

m_Manager

mitk::LevelWindowManager::Pointer QmitkSliderLevelWindowWidget::m_Manager

manager who is responsible to collect and deliver changes on Level/Window

Definition at line 100 of file QmitkSliderLevelWindowWidget.h.

m_MouseDown

bool QmitkSliderLevelWindowWidget::m_MouseDown

protected

Definition at line 125 of file QmitkSliderLevelWindowWidget.h.

m_MoveHeight

int QmitkSliderLevelWindowWidget::m_MoveHeight

protected

Definition at line 128 of file QmitkSliderLevelWindowWidget.h.

m_ObserverTag

unsigned long QmitkSliderLevelWindowWidget::m_ObserverTag

protected

Definition at line 132 of file QmitkSliderLevelWindowWidget.h.

m_Rect

QRect QmitkSliderLevelWindowWidget::m_Rect

protected

helper for drawing the component

Definition at line 116 of file QmitkSliderLevelWindowWidget.h.

m_Resize

bool QmitkSliderLevelWindowWidget::m_Resize

protected

Definition at line 123 of file QmitkSliderLevelWindowWidget.h.

m_ScaleVisible

bool QmitkSliderLevelWindowWidget::m_ScaleVisible

protected

Definition at line 129 of file QmitkSliderLevelWindowWidget.h.

m_StartPos

QPoint QmitkSliderLevelWindowWidget::m_StartPos

protected

helper for drawing the component

Definition at line 121 of file QmitkSliderLevelWindowWidget.h.

m_UpperBound

QRect QmitkSliderLevelWindowWidget::m_UpperBound

protected

Definition at line 131 of file QmitkSliderLevelWindowWidget.h.

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

• QmitkSliderLevelWindowWidget.h