Move decay radio widget into advanced group box, and set the default value to 0. This method of controlling the kernel shape is non-standard, and should be achieved instead by giving users a choice of standard kernel functions.
[FEATURE] Add option to select kernel shape (quartic, triangular or uniform) in heatmap plugin
Merge heatmap_fixes branch
Merge heatmap_fixes branch
Change float to double for calculations
Merge branch 'master' into heatmap_kernels
[FEATURE] Add triweight and Epanechnikov kernels. Make decay disabled for all kernels expect Triangular kernel. Fix math for triangular kernels.
Move kernelShape enum to heatmap.h
Update QgsColorButton so it shows a color chooser on click
Update core components to use the new QgsColorButton implementation
[FEATURE] Update QgsColorButton to offer live color chooser updates and show transparent checkerboard background

- 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
Fix missing conversion from QgsColorButtonV2 to QgsColorButton
Fix for #7398, allow alpha value change in line pattern fill color picker

- Add alpha picker and render support for: line pattern fill, line decoration symbol, font marker symbol
[FEATURE] Add composition blend modes for layers (#5248)
Add support for loading and saving blend modes to project files
New blend modes combo box widget
Add blend modes widget to vector layer properties dialog
Add blend modes widget to raster layer properties dialog
Merge pull request #475 from nyalldawson/blend_modes

Add support for blending (composition) modes, eg Overlay, Mutiply, etc (Close #5248)
Fix live color updating slot parameter by using SLOT macro