Under GTK3, the scrollbars fade in and out, causing a cascade of
re-paint events. These cause KiCad to be unresponsive while the repaint
events occur. By default this is 1s fade in 1s fade out but can be
configured by the user/wm.
Area mapping the repaint events to just scrollbar areas will be a good
solution but until/unless that happens the scrollbars in GTK3 are
problematic.
On GTK+3, the zoom events are smaller and faster, so
the trigger the zoom acceleration.
A simple fix is to use the non-accelerated Mac-style
zooming and an appropriate constant. This can be tweaked
further as needed.
Fixes: lp:1786515
* https://bugs.launchpad.net/kicad/+bug/1786515
GTK3 smooth scrolling is enabled by wxWidgets but not to the exclusion
of normal scroll up/down events. wxWidgets maps these both to the same
scroll handler and will fire them both if they are not handled before
being queued. Testing timestamps allows us to mark and ignore the
dupes.
This is set to GTK3 only for now as it isn't listed as a problem for
other platforms. But it shouldn't cause issues if it is enabled
elsewhere in the future.
The reduces a little bit of WX dependency, and makes
the timing code a bit more type-safe.
Also adds a more testable interface for the accelerated
zoom controller.
This is done to avoid a big chunk of conditionally-compiled code
in the middle of the event function.
Also separates the zoom logic from the WX_VIEW_CONTROLS object
and isolates it in a separate class behind a clearer interface.
Add some simple tests for sane steps on GTK+3-sized scroll
steps.
The only required scroll event handler is wxEVT_SCROLLWIN_THUMBTRACK,
which is responsible for dragging the scrolling sliders. One of the
remaining ones is also called when mousewheel is scrolled (MSW only) and
due to that overrides the new view setting with view settings computed
from the sliders position.
Fixes: lp:1767604
* https://bugs.launchpad.net/kicad/+bug/1767604
Gal mode: graphic cross-air cursor moved on items when clicking on & DRC error, like in legacy mode.
Make popup menu shown when right clicking on a DRC error item working.
In the previous version the method did not work correctly
when an action was invoked from context menu. In such case,
the cursor position was obtained in the moment of selecting
the action, instead of using the right click location.
New classes:
- VIEW - represents view that is seen by user, takes care of layer ordering & visibility and how it is displayed (which location, how much zoomed, etc.)
- VIEW_ITEM - Base class for every item that can be displayed on VIEW (the biggest change is that now it may be necessary to override ViewBBox & ViewGetLayers method for derived classes).
- EDA_DRAW_PANEL_GAL - Inherits after EDA_DRAW_PANEL, displays VIEW output, right now it is not editable (in opposite to usual EDA_DRAW_PANEL).
- GAL/OPENGL_GAL/CAIRO_GAL - Base Graphics Abstraction Layer class + two different flavours (Cairo is not fully supported yet), that offers methods to draw primitives using different libraries.
- WX_VIEW_CONTROLS - Controller for VIEW, handles user events, allows zooming, panning, etc.
- PAINTER/PCB_PAINTER - Classes that uses GAL interface to draw items (as you may have already guessed - PCB_PAINTER is a class for drawing PCB specific object, PAINTER is an abstract class). Its methods are invoked by VIEW, when an item has to be drawn. To display a new type of item - you need to implement draw(ITEM_TYPE*) method that draws it using GAL methods.
- STROKE_FONT - Implements stroke font drawing using GAL methods.
Most important changes to Kicad original code:
* EDA_ITEM now inherits from VIEW_ITEM, which is a base class for all drawable objects.
* EDA_DRAW_FRAME contains both usual EDA_DRAW_PANEL and new EDA_DRAW_PANEL_GAL, that can be switched anytime.
* There are some new layers for displaying multilayer pads, vias & pads holes (these are not shown yet on the right sidebar in pcbnew)
* Display order of layers is different than in previous versions (if you are curious - you may check m_galLayerOrder@pcbnew/basepcbframe.cpp). Preserving usual order would result in not very natural display, such as showing silkscreen texts on the bottom.
* Introduced new hotkey (Alt+F12) and new menu option (View->Switch canvas) for switching canvas during runtime.
* Some of classes (mostly derived from BOARD_ITEM) now includes ViewBBox & ViewGetLayers methods.
* Removed tools/class_painter.h, as now it is extended and included in source code.
Build changes:
* GAL-based rendering option is turned on by a new compilation CMake option KICAD_GAL.
* When compiling with CMake option KICAD_GAL=ON, GLEW and Cairo libraries are required.
* GAL-related code is compiled into a static library (common/libgal).
* Build with KICAD_GAL=OFF should not need any new libraries and should come out as a standard version of Kicad
Currently most of items in pcbnew can be displayed using OpenGL (to be done are DIMENSIONS and MARKERS).
More details about GAL can be found in: http://www.ohwr.org/attachments/1884/view-spec.pdf
Tomasz Włostowski
Seth Hillbrand
John Beard
Jeff Young
Maciej Suminski
jean-pierre charras
Jon Evans
Julius Schmidt
Michael Geselbracht
Baranovskiy Konstantin
Bernhard Stegmaier
Jon Neal
Garth Corral