Multi-row icon bar

[edreamleo]

I just ran across the following file from lukagolibrodo. I'm not sure how useful the above would be.

#@+leo-ver=5-thin
#@+node:lukagolibrodo.20210329145317.1: * @file /home/me/leo-environment/MakeIconbarMultirow.py
#@@language python

from leo.core.leoQt import QtWidgets, QtCore

# This script make iconbar always expanded. Mainly based on this solution:
#https://stackoverflow.com/questions/55930004/keep-qtoolbar-showing-always-all-items


class eventfilterinst(QtCore.QObject):
    def eventFilter(self, obj, event):
        if event.type() == QtCore.QEvent.Leave: # and obj is qt_widget:
            return True
        return super().eventFilter(obj, event)

#first, do it immediately
#@+<<hacks for iconbar>>
#@+node:lukagolibrodo.20210329151339.1: ** <<hacks for iconbar>>
iconbar=c.frame.iconBar.w
lay = iconbar.findChild(QtWidgets.QLayout)
if lay is not None:
    lay.setExpanded(True)

button = iconbar.findChild(QtWidgets.QToolButton, "qt_toolbar_ext_button")
if button is not None:
    button.setFixedSize(0, 0)

ieventfilterinst=eventfilterinst()
c.frame.iconBar.w.installEventFilter(ieventfilterinst)
#@-<<hacks for iconbar>>

#maybe there is some elegant solution, but if only to expand iconbar it overlaps with body and tree areas -> so just enlarge it
c.frame.iconBar.w.setFixedHeight(100)

#second, register hook (if not, behavoir of iconbar reset when save)
#this code may be dirty because every time new objects are created
def expandiconbar(tag, keywords):
    global ieventfilterinst #?
    #@+<<hacks for iconbar>>
    #@+node:lukagolibrodo.20210329151339.1: ** <<hacks for iconbar>>
    iconbar=c.frame.iconBar.w
    lay = iconbar.findChild(QtWidgets.QLayout)
    if lay is not None:
        lay.setExpanded(True)

    button = iconbar.findChild(QtWidgets.QToolButton, "qt_toolbar_ext_button")
    if button is not None:
        button.setFixedSize(0, 0)

    ieventfilterinst=eventfilterinst()
    c.frame.iconBar.w.installEventFilter(ieventfilterinst)
    #@-<<hacks for iconbar>>

g.registerHandler('save2',expandiconbar)

g.es('fin')

#@-leo

Notes

I have never gotten QMainWindow.addToolBarBreak() to work.

The following works, but does not put the two toolbars on separate rows:

toolbar = QToolBar()
c.frame.top.addToolBar(toolbar)  # c.frame.top is a `DynamicWindow`, a subclass of `QMainWindow`.

QToolBar shows a "extension" icon for large numbers of icons. Clicking this icon shows all icons on separate rows.

Summary

I have spent too much time on this issue. Somebody else will have to finish it.