Upgrade for latest feather-tk

[leighsmith]

• Added Linux build Docker container to attempt to lock down a build mechanism for Linux and a defined set of dependencies.
• Revamped code to build with the latest main branch of feather-tk, which has diverged greatly from the feather-tk API expected by the current Toucan.
• Not everything builds. The principle problem is the disappearance of IWidget::_setSizeHint() while it is used extensively in lib/toucanView (listed below). Further advice is needed for the steps to take to resolve this bit-rot.

% find . -name \* -type f -exec grep -e _setSizeHint {} \; -print
        _setSizeHint(sizeHint);
./toucan/lib/toucanView/ItemLabel.cpp
        _setSizeHint(sizeHint);
./toucan/lib/toucanView/VideoClipItem.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/LogTool.cpp
        _setSizeHint(_bellows->getSizeHint());
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/JSONTool.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/MainWindow.cpp
        _setSizeHint(_layout->getSizeHint());
        _setSizeHint(_layout->getSizeHint());
        _setSizeHint(_layout->getSizeHint());
        _setSizeHint(_label->getSizeHint());
./toucan/lib/toucanView/TimeWidgets.cpp
        _setSizeHint(sizeHint);
        _setSizeHint(sizeHint);
./toucan/lib/toucanView/TimeLayout.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/FileToolBar.cpp
        _setSizeHint(_layout->getSizeHint());
        _setSizeHint(_scrollWidget->getSizeHint());
./toucan/lib/toucanView/ExportTool.cpp
        _setSizeHint(_scrollWidget->getSizeHint());
./toucan/lib/toucanView/TimelineWidget.cpp
        _setSizeHint(_viewport->getSizeHint());
./toucan/lib/toucanView/FileTab.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/WindowToolBar.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/TrackItem.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/ToolBar.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/InfoBar.cpp
        _setSizeHint(_bellows->isVisible(false) ? _bellows->getSizeHint() : ftk::Size2I());
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/DetailsTool.cpp
        _setSizeHint(sizeHint);
./toucan/lib/toucanView/MarkerItem.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/GapItem.cpp
        _setSizeHint(_scrollWidget->getSizeHint());
./toucan/lib/toucanView/BackgroundTool.cpp
        _setSizeHint(_layout->getSizeHint());
        _setSizeHint(_scrollWidget->getSizeHint());
./toucan/lib/toucanView/GraphTool.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/AudioClipItem.cpp
        _setSizeHint(_layout->getSizeHint());
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/CompareTool.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/PlaybackBar.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/ViewToolBar.cpp
        _setSizeHint(sizeHint);
./toucan/lib/toucanView/TimelineItem.cpp
        _setSizeHint(ftk::Size2I(0, _size.thumbnailHeight));
./toucan/lib/toucanView/ThumbnailsWidget.cpp
        _setSizeHint(_layout->getSizeHint());
./toucan/lib/toucanView/StackItem.cpp

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• ✅ login: leighsmith / name: Leigh Smith (0d6ebbd, 11711cf, 162d940, 1fa2a72, 394bab3, 3d32cd7, 83e701f, 84056c7, 8dfa36e, 93bad05, b753c62, be9b2fb, c0179c2, d049a71, d4da3f2, eb85405, f4229e3)

[darbyjohnston]

Hi, and thanks for the contribution. The feather-tk library is still in early development and going through a lot of changes, sorry for the churn.

For the size hint I believe the change was moving from a setter function _setSizeHint to a virtual getter function getSizeHint(). So for example InfoBar.cpp has this code:

void InfoBar::sizeHintEvent(const ftk::SizeHintEvent& event)
{
    IWidget::sizeHintEvent(event);
    _setSizeHint(_layout->getSizeHint());
}

Which would be converted into:

Size2I InfoBar::getSizeHint() const
 {
    return _layout->getSizeHint();
}

If that seems like too much work I can take a look, but if you would like to proceed I'm happy to answer any questions.

[leighsmith]

Thanks, that gives me a good example of the intended upgrade path. I'll see what I can accomplish & report progress.