@Pl45m4 said in QSlider linked with other QSlider - hints needed:

@MasterBLB said in QSlider linked with other QSlider - hints needed:

And again, soon after I post here I get stroke of genius, and find solution on my own. Happens almost every time.

Rubber Duck Debugging at its best :))

Yepp, though before posting I spent several hours testing different approaches - most interesting finding was that for press and hold lmb on non-handle element of the slider invokes timer events. The most important discovery was:

value() returns something an event happens if the event was some kind which affect the value now, just after QSlider::event(), the value() should be different

after realizing that the rest was easy.

@J-Hilk Thanks ...I tried this.

@gde23 said in QSlider as QStyledItemDelegate: moving slider requires additional mouseclick:

So is there a way the slider can be grabbed directly from the first click?

Currently not, no - the first click is the edit trigger.

Thanks for trying @Kent-Dorfman , but I don't know Python so the example is useless for me.

@SGaist
ActionTriggered seems to work better:

void StepSlider::mouseMoveEvent(QMouseEvent *event) { int valueBefore = value(); QSlider::mouseMoveEvent(event); int valueDelta = value() - valueBefore; if (event->modifiers() == Qt::ControlModifier && valueDelta != 0) { mirroredSlider->triggerAction(valueDelta > 0 ? QAbstractSlider::SliderSingleStepAdd : QAbstractSlider::SliderSingleStepSub); } qDebug() << objectName() << " value delta:" << valueDelta; }

though in some situations mirroredSlider is not incremented/decremented properly - but that may be related to my sliders in the testbed project doesn't have properly set stuff to allow change values only by stepSize = 5

Thank you @JKSH .

Hi and welcome to devnet,

Depending on the effect you want, you should consider implementing a subclass of QAbstractSlider and to the painting yourself.

@lansing
Pro Tip. ;)

If you right click your custom class name
alt text

You can easy see and insert functions from base

alt text

@sayan275
i think you have to use another QMediaPlayer instance designated for the preview frames.

There is an example application showing this (taken from here).

@SGaist Thanks I managed to do it this way.

But why use QLineEdit if you are only manipulating numbers ? That makes the code uselessly complicated.

@UnitScan
alternatively you could "hack" a little bit.
set the step size to 1 and max value to the widgets width. Update the max value on every resize (and also recalculate the value).
You then create custom setter for your"real" max value and a new signal with the "real" value calculated linear to the base max value.

@raven-worx: while I'm not sure it is the right solution for what @tokafr wants to do, he can take ownership of the vertical scrollbar and have some influence this way. I have done it before that way.

@tokafr: Instead of trying to influence the hidden layout of the QTableView, you could mask the space between the header view and the vertical scrollbar to make it look like it being part of the header view. Stylesheets are probably the best place to try.

[SOLVED]

To make thumb slider jump directly at mouse click, use this subclass:

header file: https://nopaste.me/view/c38f6570
source file: https://nopaste.me/view/ee7b9450

EDIT: line 4 in .cpp file is useless, you can delete this

Because that's something you have to implemented and handle yourself.

@jsulm
Are there other methods for resizing an Image?

Maybe drag the Image in the Corners for resizing?

I figured out the answer. I have to create a QSlider from scratch meaning not one created from the ui already.

So,

QSlider *slider = new MySlider(Qt::horizontal); ui->frameTestLayout->addWidget(slider); slider->setFocusPolicy(Qt::NoFocus); slider->setTickPosition(QSlider::TicksAbove); slider->setTickInterval(number);

@Chris-Kawa @mrjj
sorry for the late reply,
thanks guys it now works using setnotifyinterval() :)