QIcon not actually generating variations for QToolButton?

[davecotter]

note that "state" doesn't seem to be different between "off" and "on", so what is its purpose?

[mrjj]

Hi
on/off is used for Checkable buttons.
pr default its shown via the frame when checked but could
also have another icon. like big fat checkmark :)

Adding
icon.addFile(QStringLiteral(":/test.svg"), QSize(), QIcon::Normal, QIcon::Off);
also generates the other icons as i can later paint with them.
(in paintevent)
icon().paint(&p,rect(),Qt::AlignCenter, QIcon::Mode::Disabled, QIcon::State::Off);

[davecotter]

i'm using QToolButton, and QImages which have already been created. I'm not loading QIcons directly from files. How do i create a QIcon that i can then load into QToolButton, such that when the user clicks it, it shows a "darkened" or "pressed" image?

[davecotter]

does nobody else create QIcons programmatically, to be used in QToolButton?

[ODБOï]

@davecotter

QImage img(":/Icon.png");

auto toolButton = new QToolButton(toolBar);
toolButton->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
auto act = new QAction();
act->setIcon(QPixmap::fromImage(img));
act->setText("text");
toolButton->setDefaultAction(act);

[davecotter]

that code snip only adds in a single state (the up state). i have separate pngs for the down and disabled state that never get used. how do i cause my tool button to use those states?

[kshegunov]

I believe you're looking for this.

[davecotter]

@kshegunov that's literally the code i'm already using but it's not working. see the code snips at the start of this thread, am I doing it wrong?

[kshegunov]

Yeah, sorry. I think it worked for a push button. could you try that? I don't recall currently if it's supposed to work with the toolbar button, I remember recently doing something akin but it was a table delegate so I was drawing it manually.

EDIT:
I think my brain had gone on a vacation ...
What style are you using? Is it possible the style doesn't support that? I usually use Fusion (i.e. Qt drawing).

[davecotter]

not sure what you mean by "style", i'm just using Qt out of the box, i haven't specifically selected a "style".

unfortunately the "QPushButton" does not draw the icon as "pressed" either, it just darkens the background which is not what i want:

[kshegunov]

not sure what you mean by "style", i'm just using Qt out of the box, i haven't specifically selected a "style".

Judging by your screenshot you're using the native osx style.

From what I can see here: https://code.woboq.org/qt5/qtbase/src/widgets/styles/qcommonstyle.cpp.html#1700
The tool button only takes 3 icon states - active, disabled and normal. Selected isn't one of them. But that's for Fusion, I have no clue what goes in the native osx style. So first advice - switch to fusion and use Normal/Active to alternate between unpressed/pressed. If that's what you're expecting go back to the native style and see if the problem is there. If so I'd say it's either a bug or limitation of the native style's implementation.

[davecotter]

Fusion is un-mac-like, so i would not want to use it. strangely, "active" seems to mean "focused". when i click in the button it does turn color as expected but if i track the mouse (keep holding) while dragging OFF the button, it should re-draw in it's UP state, but it doesn't. when i let go it should do the same, but it STAYS looking pressed. if i then click the volume slider, the button THEN draws in the UP state. am i just not getting how this is designed to work?

[davecotter]

here is a minimal (20k) project demonstrating the problem.

[kshegunov]

@davecotter said in QIcon not actually generating variations for QToolButton?:

Fusion is un-mac-like, so i would not want to use it.

I meant it purely as an academic exercise, so to say.

@davecotter said in QIcon not actually generating variations for QToolButton?:

strangely, "active" seems to mean "focused". when i click in the button it does turn color as expected but if i track the mouse (keep holding) while dragging OFF the button, it should re-draw in it's UP state, but it doesn't. when i let go it should do the same, but it STAYS looking pressed. if i then click the volume slider, the button THEN draws in the UP state.

Well, that's odd. Unfortunately I have no answers for you here, sorry.

[davecotter]

filed this bug

please vote for it / watch it, if you care. thanks.