Media Clipboard Item Preview Pane

[NatalieElizabeth]

This is a feature intended to make it possible to preview tracks in the media clipboard, similarly to how you can enable a file preview pane in Windows File Explorer. This idea is primarily based on the media preview implemented in Adobe Premier Pro, where it's standard in the workflow to be able to preview and perform certain manipulations on (seeking, play/pause, zooming) media selected in the media clipboard/explorer widget before deciding what to do.

• The pane will be horizontal and positioned along the bottom of the screen, since tracks are horizontal entities. This will require the displacement or rethinking of the status and help boxes that currently reside in that space.
• The pane should be toggleable (x button or from view menu) and collabsible (- button)
• Core playback controls:
  • Loop/Repeat Toggle
  • Scrubbing and click to seek
  • Jump to start (|<)
• Waveform and Time Interaction
  • Horizontal zoom in/out (buttons and scroll)
  • Vertical zoom (amplitude) (ctrl + scroll or something of that nature)
  • Selectable region (for loop/repeat)
  • Snap to grid (?)
• Track Info and Quick Actions
  • Track label (duplicate rename field)
  • Track metadata (extent to be discussed)
    • Sample rate
    • Length
    • Source path
  • Delete
• Visual Feedback
  • Cynthia's time axis
  • Playback cursor/playhead
  • Peak meter or level display (current aplitude) as a bar on the side (?)
  • Preserve labels or other visual metadata that HARP supports already
• Integration
  • The preview plane displays whichever track is currently selected. If this is a track that can be dragged to another widget, you should be able to do so from the preview pane as well. (e.g. dragging a track from the clipboard to a model - you could drag it from the preview pane to the model as well, if you want) (?)
  • Keyboard shortcuts
    • Space - play/pause
    • Arrow keys - nudge playhead
    • Del - delete track
  • Vertically resizeable by drag
    • If other components have this especially
    • If other components don't have this, perhaps we should discuss it

[NatalieElizabeth]

My current intention is to create a visual mockup of how I think things will be placed and then receive feedback on that before I begin implementation.

[NatalieElizabeth]

Linked my issue_405 branch to this issue, which is based on Cynthia's 375 branch since it contains the new MediaDisplayComponent features that I need for this feature.
The latest commit contains the component for the preview pane as a placeholder. It's integrated into the view menu, is toggleable, and... exists. For next steps, I'll see what there is to be said about the placement of the component and what it should contain at the group meeting.