Rationale:
- there was a lot of large objects passed by value, so potentially
there's a speed bump from this
- even for implicitly shared classes like QString/QList there's still
a (small) cost for copying the objects when there's no reason to
- it's the right thing to do!
it's a Frankenstein's monster of the best bits of lots of other color
picker implementations. Features include:
- Sliders for hue, saturation, value, red, green, blue color components
- Alpha slider
- Option to copy/paste html color codes (in a variety of formats)
- Before/after color preview, with alpha preview
- Interactive 2D color ramp widget
- Hue wheel/triangle widget
- Editable color swatch lists
- Live color sampler with option to sample over a set radius
- Supports interaction with other apps via drag and drop of colors (OS support
dependant)
- Option to disable the dialog and use the native picker dialog instead (TODO:
make the dialog so awesome that even @dakcarto switches across...)
Credit for icons goes to 3nids!
- Add option to Options for live color chooser support (QgsColorDialog)
- Add ability to define whether QgsColorButton accepts live updates (default: true)
- Move QgsColorButton to single subclass of QPushButton
- Show different button types relative to whether button has text
- Add transparent checkerboard background for chosen colors with alpha < 255
- Fix triple-modal window issue for Mac (with regards to using native color dialog)
- Composer item frame now supports transparency
- Composer item background transparency support moved to color dialog
- Composer composition grid now supports transparency
