Simple ListBox without a column header?

Development
1

I’m having a hard time finding an example for making a ListBox component that doesn’t use headers. My end goal is to have a simple single column list with ToggleButton rows. I think I’m good as far as the row items go, but I can’t find in the API docs any way of adding anything to a ListBox object. I have a ListBoxModel-derived class set up, but unsure where to go from there. If anything, I think I’m overdoing this when there could be a simple solution that I’m just not finding anywhere.

Code can be found at https://github.com/NebuHiiEjamu/CinemixAutomationBridge and the relevant files are for CheckBoxColumn and SimpleListBoxModel. I’m trying to make this to use as a component for PluginSettings

2

Hope it’s okay to bump. I’ve tried looking at the code for the DemoRunner’s side panel list, but my brain hurts to look at it.

1 Like
3

I’ll help bump it. I’m trying to piece this together myself at the moment. Some old forum posts mention a DragAndDropDemo.cpp but I don’t think it exists anymore (or at least I can’t find it). If I figure anything out I’ll let you know.

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4

Think I figured it out! The FontsDemo was very helpful.

Here’s the simplest form of a listbox that I could get displaying text. Doesn’t attempt to pull data from anywhere, just generates text directly.

I’d wager that to use a custom component instead of just drawing text, you’d place it inside the painListBoxItem() function.

class BasicListBox    : public ListBoxModel, public Component
{
public:
BasicListBox()
{
    // In your constructor, you should add any child components, and
    // initialise any special settings that your component needs.
    addAndMakeVisible(listBox);
    listBox.setRowHeight (30);
    listBox.setModel (this);   // Tell the listbox where to get its data model
    listBox.setColour (ListBox::textColourId, Colours::black);
    listBox.setColour (ListBox::backgroundColourId, Colours::white);
    
    setSize (400,600);
}

~BasicListBox()
{
}

void paint (Graphics& g) override
{
    /* This demo code just fills the component's background and
       draws some placeholder text to get you started.

       You should replace everything in this method with your own
       drawing code..
    */
	g.fillAll (Colours::lightgrey);   // clear the background
    
}

void resized() override
{
    // This method is where you should set the bounds of any child
    // components that your component contains..

	listBox.setBounds(0, 0, getParentWidth(), getParentHeight());
}

// The following methods implement the ListBoxModel virtual methods:
int getNumRows() override
{
    return 12; //you should probably derive this from whatever source data you end up using
}

void paintListBoxItem (int rowNumber, Graphics& g,
                       int width, int height, bool rowIsSelected) override
{

    if (rowIsSelected)
        g.fillAll (Colours::lightblue);        

    g.setColour (Colours::black);
    g.setFont (height * 0.7f);
   
    g.drawText ("Row Number " + String (rowNumber + 1), 5, 0, width, height,
                Justification::centredLeft, true);
}

void selectedRowsChanged (int /*lastRowselected*/) override
{
    //do stuff when selection changes
}


private:
ListBox listBox;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (BasicListBox)
};
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5

Awesome! Much appreciated!