I have three panels. Panel 1 is at the far left, docked left.. Panel 2 is in the middle. Panel 3 is at the far right, docked right. How do I get the middle panel (panel 2) to keep its left side anchored to the right side of panel 1, and it's right side anchored to the left side of panel 3, as the window resizes, or when I drag the shared side with panel 1 or panel 2? Basically, I want it to add like its dock property was 'fill" if it was a regular panel.
Right now, if I resize window by expanding the right side, there will be a gap between the right side of panel 2 (middle panel) and the left side of panel 3 (rightmost panel). In other words, panel 2 will not automatically expand to fill the extra space caused by resizing the window.
