Many coordinates are dynamically calculated. It is adjustable against client area change.
- Fix some brush/eraser shapes for pixel perfection.
- Reduce magic numbers in toolssettings.cpp.
- Refactoring.
CORE-18867
- Add CPaletteWindow::OnEraseBkgnd to avoid flickering.
- Add getColorBoxRect and drawColorBox helper functions to draw a color box.
- Add CPaletteWindow::DoHitTest helper function to do a hit test.
- Improve CPaletteWindow::OnPaint by using a memory bitmap.
- Improve readability of CMainWindow::alignChildrenToMainWindow.
CORE-18867