# Main Layout of the Application

## Main BMP Window / Playback sources

This is the main BMP window the way it will present itself to you. The number of items in the artist list visible here might be different, but the general layout will be the same. The green highlighted area at the left is the Playback Source selection.

## Selected and playing Sources

### Selected Playback Source

The selected source is the source whose controls the main area of the BMP window will display, when selected. Playback still happens from the playing source (see below), until the user intervenes and decides to start playback from the selected source. Visually it is rendered using a light grey background with darker grey text.

### Playing Playback Source

The playing source ('the', because only one source can be playing at any given time) is the source which currently is being played from, and which for the most part currently controls the behaviour of the application. It is visually being rendered using a light shade of blue with white text. If no source is playing, then none of the sources will be highlited like this, but at least one will be always the selected one (see above).

The playing source can also be the selected source (in case the user simply selects the currently playing source). In this case, the source is being rendered visually the way a playing source is being rendered, with no other source than this one being marked as either selected (nor playing, of course). This makes it easy to recognize that the currently displayed controls belong to the currently playing source,

### Source Controls Area

The 'Radio' source is currently selected (red highlighted area), and also playing (no other source is being displayed as selected, as can be seen). The green highlighted area marks the area where BMP is currently displaying the controls which belong to the 'Radio' source (a list of radio streams in this case).