TODO

• Allow set different values as double tap max zoom
• Allow limit max image size (zoom level) in pixels or as fraction of view size
• Preserve state when full image is loaded above thumbnail
• Set bigger view pager scroll slop when panning. Or disable view pager scroll when zoomed.
• Zoom out from full image to initial position in list
• Allow scroll up/down gestures to close full image mode.
• Tilt phone to pan image
• Add custom sources for opening animation (better API)