ui: Keyboard controls (#935)

* switch focus between views with Tab
* move focus within views with WASD/HJKL/Arrows
* move focus between graph edges by holding Shift
* move focus between code references by holding Shift
* removed graph panning with WASD and moved zooming to Alt + W/S
* removed graph navigation by pressing starting character in graph view lists
* changed local reference and custom trail shortcuts
* updated Keyboard Shortcuts window
* use common back and forward shortcuts and YZ & Shift + YZ
* fix macOS issue where widgets don't get proper focus after creating a new tab
* don't use shared_ptr in QtMainView

fixes #486, #327, #214, #210

testing/keyboard_controls/data/view_tests.cpp

@@ -0,0 +1,129 @@
+
+#define VIEW_TESTS
+
+// TEST: Switch Focus with Tab
+// START ----------------------------------------------------------------------
+
+class ViewTestClass {}; // <- ACTION: Activate
+
+// ACTION: Press Tab continuously
+// RESULT: Focus is moved between Graph and Code
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Focus Search View
+// START ----------------------------------------------------------------------
+
+// ACTION: Use Find shortcut
+// RESULT: Search view shows focus
+
+// ACTION: press Tab
+// RESULT: Search View loses focus
+
+// ACTION: Click into search field
+// RESULT: Search view shows focus
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Focus Graph View
+// START ----------------------------------------------------------------------
+
+// ACTION: Hover nodes using the mouse
+// RESULT: graph view receives focus
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Focus Code View
+// START ----------------------------------------------------------------------
+
+ViewTestClass v; // <- ACTION: Hover location of 'v'
+
+// RESULT: code view receives focus
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Graph remembers previously focused node
+// START ----------------------------------------------------------------------
+
+// ACTION: Hover a 'ViewTestFocus' in the graph
+
+// ACTION: Press Tab
+// RESULT: code view receives focus
+
+// ACTION: Press Tab
+// RESULTS:
+// - graph receives focus
+// - 'ViewTestFocus' is focused again
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Code remembers previously focused location
+// START ----------------------------------------------------------------------
+
+ViewTestClass var; // <- ACTION: Hover location of 'var'
+
+// ACTION: Press Tab
+// RESULT: graph view receives focus
+
+// ACTION: Press Tab
+// RESULTS:
+// - code receives focus
+// - 'var' is focused again
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Focus at active symbol when clicked in code
+// START ----------------------------------------------------------------------
+
+class ViewTestFocus // <- ACTION: Activate
+{
+	ViewTestClass member;
+};
+
+class ViewTestFocusDerived : public ViewTestFocus {};
+
+// RESULTS:
+// - Focus stays in code view
+// - Clicked location has focus
+
+// ACTION: Press Tab
+// RESULTS:
+// - Focus is moved to graph
+// - active node receives initial focus
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Focus at active symbol when clicked in graph
+// START ----------------------------------------------------------------------
+
+class ViewTestFocusUser
+{
+	ViewTestFocus focus;
+};
+
+// ACTION: Activate 'ViewTestFocusUser' in graph
+
+// RESULTS:
+// - Focus stays in graph view
+// - Clicked node has focus
+
+// ACTION: Press Tab
+// RESULTS:
+// - Focus is moved to code
+// - active location receives initial focus
+
+// END ------------------------------------------------------------------------