KisQtWidgetsTweaker Class Reference

#include <KisQtWidgetsTweaker.h>

Inheritance diagram for KisQtWidgetsTweaker:

Classes
struct	Private

Public Member Functions
bool	eventFilter (QObject *receiver, QEvent *event) override
	KisQtWidgetsTweaker (QObject *parent=nullptr)
	~KisQtWidgetsTweaker ()

Static Public Member Functions
static KisQtWidgetsTweaker *	instance ()

Private Attributes
Private *	d

Detailed Description

KisQtWidgetsTweaker is used to make minor adjustments to "native" qt widgets' behavior application-wise by filtering events addressed to them It expected to be installed on the application

Definition at line 20 of file KisQtWidgetsTweaker.h.

Constructor & Destructor Documentation

KisQtWidgetsTweaker()

KisQtWidgetsTweaker::KisQtWidgetsTweaker

(

QObject *

parent = nullptr

)

Definition at line 231 of file KisQtWidgetsTweaker.cpp.

    :QObject(parent)
    , d(new KisQtWidgetsTweaker::Private(this))
{
 
}

~KisQtWidgetsTweaker()

KisQtWidgetsTweaker::~KisQtWidgetsTweaker

(

)

Definition at line 238 of file KisQtWidgetsTweaker.cpp.

{
    delete d;
}

References d.

Member Function Documentation

eventFilter()

bool KisQtWidgetsTweaker::eventFilter ( QObject * receiver, QEvent * event )

override

Definition at line 242 of file KisQtWidgetsTweaker.cpp.

{
    switch(event->type()) {
    case QEvent::ShortcutOverride:{
        //QLineEdit and other widgets lets qt's shortcut system take away it's keyboard events
        //even is it knows them, such as ctrl+backspace
        //if there is application-wide shortcut, assigned to it.
        //The following code fixes it
        //by accepting ShortcutOverride events.
 
        //if you press key 'a' and then 'b', qt at first call
        //all handlers for 'a' key press event, and only after that
        //for 'b'
        QKeyEvent *key = static_cast<QKeyEvent*>(event);
        if (d->lastKeyPressProcessingComplete) {
            d->newPhysicalKeyPressed(key);
        }
        for(int i = 0; i < numOfShortcutOverriders; ++i) {
            if (d->decision != ShortcutOverriderBase::DecisionOnShortcutOverride::askNext) {
                break;
            }
            if (d->interestedHandlers.at(i)) {
                d->decision = allShortcutOverriders[i]->handleEvent(receiver, key);
            }
        }
        //if nothing said whether shortcutoverride to be accepted
        //last widget that qt will ask will be kismainwindow or docker
        if (qobject_cast<KisMainWindow*>(receiver)!=nullptr||
            receiver->inherits(QDockWidget::staticMetaObject.className())) {
            for (int i = 0; i < numOfShortcutOverriders; ++i) {
                if (d->decision != ShortcutOverriderBase::DecisionOnShortcutOverride::askNext) {
                    break;
                }
                if (d->interestedHandlers.at(i)) {
                    d->decision = allShortcutOverriders[i]->finishedPhysicalKeyPressHandling();
                }
            }
 
            d->lastKeyPressProcessingComplete = true;
        }
        bool retval = false;
        switch (d->decision) {
        case ShortcutOverriderBase::DecisionOnShortcutOverride::askNext:
            event->ignore();
            retval = false;
            break;
        case ShortcutOverriderBase::DecisionOnShortcutOverride::dontOverrideShortcut:
            event->ignore();
            retval = true;
            break;
        case ShortcutOverriderBase::DecisionOnShortcutOverride::overrideShortcut:
            event->accept();
            //once shortcutoverride accepted, qt stop asking everyone
            //about it and proceed to handling next event
            d->lastKeyPressProcessingComplete = true;
            retval = true;
            break;
        }
 
        return retval || QObject::eventFilter(receiver, event);
 
    }break;
 
        //other event types
    default:
        break;
    }
 
 
    //code for tweaking the behavior of other qt elements will go here
 
 
    return QObject::eventFilter(receiver, event);
}

References d, KisQtWidgetsTweaker::Private::decision, KisQtWidgetsTweaker::Private::interestedHandlers, KisQtWidgetsTweaker::Private::lastKeyPressProcessingComplete, and KisQtWidgetsTweaker::Private::newPhysicalKeyPressed().

instance()

KisQtWidgetsTweaker * KisQtWidgetsTweaker::instance ( )

static

Definition at line 318 of file KisQtWidgetsTweaker.cpp.

{
    return kqwt_instance;
}

Member Data Documentation

d

Private* KisQtWidgetsTweaker::d

private

Definition at line 31 of file KisQtWidgetsTweaker.h.

---

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

• libs/ui/input/KisQtWidgetsTweaker.h
• libs/ui/input/KisQtWidgetsTweaker.cpp