DiagramEventAddImage Class Reference

The DiagramEventAddImage class This diagram event, handle the adding of an image in a diagram. More...

#include <diagrameventaddimage.h>

Inheritance diagram for DiagramEventAddImage:

Collaboration diagram for DiagramEventAddImage:

Public Member Functions
	DiagramEventAddImage (Diagram *diagram)
	DiagramEventAddImage::DiagramEventAddImage Default constructor.
	~DiagramEventAddImage () override
	DiagramEventAddImage::~DiagramEventAddImage.
void	mousePressEvent (QGraphicsSceneMouseEvent *event) override
	DiagramEventAddImage::mousePressEvent Left button: starts a potential drag-to-resize, anchored here – but doesn't commit to anything yet. A quick click-release (see mouseMoveEvent's threshold check) still places the image at its original size, matching the previous behavior exactly; only an actual drag switches to resizing. Right button still rotates in 90 degree steps, unchanged, and only while not already left-dragging.
void	mouseMoveEvent (QGraphicsSceneMouseEvent *event) override
	DiagramEventAddImage::mouseMoveEvent Action when mouse move.
void	mouseReleaseEvent (QGraphicsSceneMouseEvent *event) override
	DiagramEventAddImage::mouseReleaseEvent Left button release commits whatever mouseMoveEvent last set – original size and centered if the press never turned into a real drag, or the dragged-out size and position otherwise. Either way, this is the only place placement is actually finalized now; a plain click no longer finishes inside mousePressEvent itself, since it has to wait and see whether a drag follows.
void	mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event) override
	DiagramEventAddImage::mouseDoubleClickEvent This method is used only to overwrite double click. When double click, image properties dialog isn't open.
void	wheelEvent (QGraphicsSceneWheelEvent *event) override
	DiagramEventAddImage::wheelEvent Action when mouse wheel is rotated.
bool	isNull () const
	DiagramEventAddImage::isNull.
Public Member Functions inherited from DiagramEventInterface
	DiagramEventInterface (Diagram *diagram)
	~DiagramEventInterface () override=0
virtual void	keyPressEvent (QKeyEvent *event)
	DiagramEventInterface::keyPressEvent By default, press escape key abort the current action.
virtual void	keyReleaseEvent (QKeyEvent *event)
virtual bool	isRunning () const
virtual void	init ()

Private Member Functions
void	openDialog ()
	DiagramEventAddImage::openDialog Open dialog to select the image to add.
void	showHint () const
	DiagramEventAddImage::showHint Re-asserted on every move (see mouseMoveEvent), not just once at activation: Qt's own built-in "show an action's statusTip on hover" has its own internal "restore whatever was there before" logic for when the hover ends. Since this message is first shown during that same hover session (the user is still over the toolbar icon when the deferred constructor-time call above fires), Qt's hover-tracking has no idea this code changed the status bar in the meantime – the moment the mouse leaves the icon for the canvas, it silently restores whatever it remembers being there before its own tip started, overwriting this one. Re-showing it on every move within the canvas simply outlasts that one-time restore – the exact same issue already found and fixed for the shape tools.

Private Attributes
DiagramImageItem *	m_image
bool	m_is_added
bool	m_pressed = false
bool	m_resize_engaged = false
QPointF	m_press_pos

Additional Inherited Members
Signals inherited from DiagramEventInterface
void	finish ()
Protected Attributes inherited from DiagramEventInterface
QPointer< Diagram >	m_diagram
bool	m_running {false}
bool	m_abort {false}

Detailed Description

The DiagramEventAddImage class This diagram event, handle the adding of an image in a diagram.

Constructor & Destructor Documentation

DiagramEventAddImage()

DiagramEventAddImage::DiagramEventAddImage

(

Diagram *

diagram

)

DiagramEventAddImage::DiagramEventAddImage Default constructor.

Parameters

diagram

: diagram where operate this event

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~DiagramEventAddImage()

DiagramEventAddImage::~DiagramEventAddImage ( )

override

DiagramEventAddImage::~DiagramEventAddImage.

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Member Function Documentation

isNull()

bool DiagramEventAddImage::isNull

(

)

const

DiagramEventAddImage::isNull.

Returns

: true if image can't be loaded, otherwise return false.

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mouseDoubleClickEvent()

void DiagramEventAddImage::mouseDoubleClickEvent ( QGraphicsSceneMouseEvent * event )

overridevirtual

DiagramEventAddImage::mouseDoubleClickEvent This method is used only to overwrite double click. When double click, image properties dialog isn't open.

Parameters

event

: event of mouse double click.

Reimplemented from DiagramEventInterface.

mouseMoveEvent()

void DiagramEventAddImage::mouseMoveEvent ( QGraphicsSceneMouseEvent * event )

overridevirtual

DiagramEventAddImage::mouseMoveEvent Action when mouse move.

Parameters

event

: event of mouse move

Reimplemented from DiagramEventInterface.

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mousePressEvent()

void DiagramEventAddImage::mousePressEvent ( QGraphicsSceneMouseEvent * event )

overridevirtual

DiagramEventAddImage::mousePressEvent Left button: starts a potential drag-to-resize, anchored here – but doesn't commit to anything yet. A quick click-release (see mouseMoveEvent's threshold check) still places the image at its original size, matching the previous behavior exactly; only an actual drag switches to resizing. Right button still rotates in 90 degree steps, unchanged, and only while not already left-dragging.

Parameters

event

: event of mouse pressed

Reimplemented from DiagramEventInterface.

mouseReleaseEvent()

void DiagramEventAddImage::mouseReleaseEvent ( QGraphicsSceneMouseEvent * event )

overridevirtual

DiagramEventAddImage::mouseReleaseEvent Left button release commits whatever mouseMoveEvent last set – original size and centered if the press never turned into a real drag, or the dragged-out size and position otherwise. Either way, this is the only place placement is actually finalized now; a plain click no longer finishes inside mousePressEvent itself, since it has to wait and see whether a drag follows.

Parameters

event

: event of mouse release

Reimplemented from DiagramEventInterface.

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openDialog()

void DiagramEventAddImage::openDialog ( )

private

DiagramEventAddImage::openDialog Open dialog to select the image to add.

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showHint()

void DiagramEventAddImage::showHint ( ) const

private

DiagramEventAddImage::showHint Re-asserted on every move (see mouseMoveEvent), not just once at activation: Qt's own built-in "show an action's statusTip on hover" has its own internal "restore whatever was there before" logic for when the hover ends. Since this message is first shown during that same hover session (the user is still over the toolbar icon when the deferred constructor-time call above fires), Qt's hover-tracking has no idea this code changed the status bar in the meantime – the moment the mouse leaves the icon for the canvas, it silently restores whatever it remembers being there before its own tip started, overwriting this one. Re-showing it on every move within the canvas simply outlasts that one-time restore – the exact same issue already found and fixed for the shape tools.

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wheelEvent()

void DiagramEventAddImage::wheelEvent ( QGraphicsSceneWheelEvent * event )

overridevirtual

DiagramEventAddImage::wheelEvent Action when mouse wheel is rotated.

Parameters

event

evet of mouse wheel

Reimplemented from DiagramEventInterface.

Member Data Documentation

m_image

DiagramImageItem* DiagramEventAddImage::m_image

private

m_is_added

bool DiagramEventAddImage::m_is_added

private

m_press_pos

QPointF DiagramEventAddImage::m_press_pos

private

m_pressed

bool DiagramEventAddImage::m_pressed = false

private

m_resize_engaged

bool DiagramEventAddImage::m_resize_engaged = false

private

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

• sources/diagramevent/diagrameventaddimage.h
• sources/diagramevent/diagrameventaddimage.cpp