KisColorLabelMouseDragFilter Class Reference

#include <kis_color_label_button.h>

Inheritance diagram for KisColorLabelMouseDragFilter:

Public Member Functions
	KisColorLabelMouseDragFilter (QObject *parent=nullptr)

Protected Member Functions
void	checkSlideOverNeighborButtons (QMouseEvent *mouseEvent, class QAbstractButton *startingButton)
bool	eventFilter (QObject *obj, QEvent *event) override

Private Types
enum	State { Idle , WaitingForDragLeave , WaitingForDragEnter }

Private Attributes
State	currentState
QPoint	lastKnownMousePosition

Detailed Description

Definition at line 77 of file kis_color_label_button.h.

Member Enumeration Documentation

State

enum KisColorLabelMouseDragFilter::State

private

Enumerator
Idle
WaitingForDragLeave
WaitingForDragEnter

Definition at line 78 of file kis_color_label_button.h.

              {
        Idle,
        WaitingForDragLeave, //Waiting for mouse to exit first clicked while the mouse button is down.
        WaitingForDragEnter //Waiting for mouse to slide across buttons within the same button group.
    };

Constructor & Destructor Documentation

KisColorLabelMouseDragFilter()

KisColorLabelMouseDragFilter::KisColorLabelMouseDragFilter

(

QObject *

parent = nullptr

)

Definition at line 306 of file kis_color_label_button.cpp.

                                                                          : QObject(parent)
{
    lastKnownMousePosition = QPoint(0,0);
    currentState = Idle;
}

References currentState, Idle, and lastKnownMousePosition.

Member Function Documentation

checkSlideOverNeighborButtons()

void KisColorLabelMouseDragFilter::checkSlideOverNeighborButtons ( QMouseEvent * mouseEvent, class QAbstractButton * startingButton )

protected

Definition at line 391 of file kis_color_label_button.cpp.

{
    const QPoint currentPosition = mouseEvent->globalPos();
 
    if (startingButton->group()) {
        QList<QAbstractButton*> allButtons = startingButton->group()->buttons();
 
        Q_FOREACH(QAbstractButton* button, allButtons) {
            const QRect bounds = QRect(button->mapToGlobal(QPoint(0,0)), button->size());
            const QPoint upperLeft = QPoint(qMin(lastKnownMousePosition.x(), currentPosition.x()), qMin(lastKnownMousePosition.y(), currentPosition.y()));
            const QPoint lowerRight = QPoint(qMax(lastKnownMousePosition.x(), currentPosition.x()), qMax(lastKnownMousePosition.y(), currentPosition.y()));
            const QRect mouseMovement = QRect(upperLeft, lowerRight);
            if( bounds.intersects(mouseMovement) && !bounds.contains(lastKnownMousePosition)) {
                button->click();
            }
        }
    }
}

References bounds, button(), and lastKnownMousePosition.

eventFilter()

bool KisColorLabelMouseDragFilter::eventFilter ( QObject * obj, QEvent * event )

overrideprotected

Definition at line 312 of file kis_color_label_button.cpp.

{
    if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick) {
        QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 
        currentState = WaitingForDragLeave;
        lastKnownMousePosition = mouseEvent->globalPos();
 
        return true;
 
    } else if (event->type() == QEvent::MouseButtonRelease) {
        QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
        QAbstractButton* startingButton = static_cast<QAbstractButton*>(obj);
 
        //If we never left, toggle the original button.
        if( currentState == WaitingForDragLeave ) {
            if ( startingButton->group() && (mouseEvent->modifiers() & Qt::SHIFT)) {
                KisColorLabelFilterGroup* const group = static_cast<KisColorLabelFilterGroup*>(startingButton->group());
                const QList<QAbstractButton*> viableCheckedButtons = group->checkedViableButtons();
 
                const int buttonsEnabled = viableCheckedButtons.count();
                const bool shouldChangeIsolation = (buttonsEnabled == 1) && (viableCheckedButtons.first() == startingButton);
                const bool shouldIsolate = (buttonsEnabled != 1) || !shouldChangeIsolation;
 
                Q_FOREACH(QAbstractButton* otherBtn, group->viableButtons()) {
                    if (otherBtn == startingButton){
                        startingButton->setChecked(true);
                    } else {
                        otherBtn->setChecked(!shouldIsolate);
                    }
                }
 
            } else {
                startingButton->click();
            }
        }
 
        currentState = Idle;
        lastKnownMousePosition = mouseEvent->globalPos();
 
        return true;
 
    } else if (event->type() == QEvent::MouseMove) {
 
        if (currentState == WaitingForDragLeave) {
            QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
            QWidget* firstClicked = static_cast<QWidget*>(obj);
            const QPointF localPosition = mouseEvent->localPos();
 
            if (!firstClicked->rect().contains(localPosition.x(), localPosition.y())) {
                QAbstractButton* btn = static_cast<QAbstractButton*>(obj);
                btn->click();
 
                checkSlideOverNeighborButtons(mouseEvent, btn);
 
                currentState = WaitingForDragEnter;
            }
 
            lastKnownMousePosition = mouseEvent->globalPos();
 
            return true;
 
        } else if (currentState == WaitingForDragEnter) {
            QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
            QAbstractButton* startingButton = static_cast<QAbstractButton*>(obj);
            const QPoint currentPosition = mouseEvent->globalPos();
 
            checkSlideOverNeighborButtons(mouseEvent, startingButton);
 
            lastKnownMousePosition = currentPosition;
 
            return true;
        }
 
    }
 
    return false;
}

References KisColorLabelFilterGroup::checkedViableButtons(), checkSlideOverNeighborButtons(), currentState, Idle, lastKnownMousePosition, KisColorLabelFilterGroup::viableButtons(), WaitingForDragEnter, and WaitingForDragLeave.

Member Data Documentation

currentState

State KisColorLabelMouseDragFilter::currentState

private

Definition at line 84 of file kis_color_label_button.h.

lastKnownMousePosition

QPoint KisColorLabelMouseDragFilter::lastKnownMousePosition

private

Definition at line 85 of file kis_color_label_button.h.

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

• libs/ui/widgets/kis_color_label_button.h
• libs/ui/widgets/kis_color_label_button.cpp