JUCE/extras/Projucer/Source/LiveBuildEngine/UI/jucer_ActivityListComponent.h

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#pragma once


//==============================================================================
class CurrentActivitiesComp   : public Component,
                                private ChangeListener,
                                private ListBoxModel,
                                private Timer
{
public:
    CurrentActivitiesComp (ActivityList& activities)
        : Component ("Activities"), activityList (activities)
    {
        addAndMakeVisible (&list);
        list.setColour (ListBox::backgroundColourId, Colours::transparentBlack);
        list.setRowHeight (16);
        list.setModel (this);

        activityList.addChangeListener (this);
    }

    ~CurrentActivitiesComp() override
    {
        activityList.removeChangeListener (this);
    }

    void resized() override         { list.setBounds (getLocalBounds()); }

    int getNumRows() override
    {
        return activityList.getNumActivities();
    }

    void paintListBoxItem (int rowNumber, Graphics& g,
                           int width, int height, bool /*rowIsSelected*/) override
    {
        const StringArray activities (activityList.getActivities());

        if (rowNumber >= 0 && rowNumber < activities.size())
        {
            g.setColour (findColour (defaultTextColourId));

            g.setFont (height * 0.7f);
            g.drawText (activities [rowNumber],
                        4, 0, width - 5, height, Justification::centredLeft, true);
        }
    }

    void paint (Graphics& g) override
    {
        if (getNumRows() == 0)
            TreePanelBase::drawEmptyPanelMessage (*this, g, "(No activities)");
    }

    static int getMaxPanelHeight()      { return 200; }

private:
    ActivityList& activityList;
    ListBox list;
    int panelHeightToSet;

    void timerCallback() override
    {
        stopTimer();

        if (ConcertinaPanel* cp = findParentComponentOfClass<ConcertinaPanel>())
            cp->setPanelSize (this, panelHeightToSet, true);
    }

    void changeListenerCallback (ChangeBroadcaster*) override
    {
        list.updateContent();

        panelHeightToSet = jmax (3, getNumRows()) * list.getRowHeight() + 15;

        if (! isTimerRunning())
            startTimer (100);

        repaint();
    }
};