Ichthyostega
acb674a9d2
...in an attempt to clarify why numerous cross links are not generated. In the end, this attempt was not very successful, yet I could find some breadcrumbs... - file comments generally seem to have a problem with auto link generation; only fully qualified names seem to work reliably - cross links to entities within a namespace do not work, if the corresponding namespace is not documented in Doxygen - documentation for entities within anonymous namespaces must be explicitly enabled. Of course this makes only sense for detailed documentation (but we do generate detailed documentation here, including implementation notes) - and the notorious problem: each file needs a valid @file comment - the hierarchy of Markdown headings must be consistent within each documentation section. This entails also to individual documented entities. Basically, there must be a level-one heading (prefix "#"), otherwise all headings will just disappear... - sometimes the doc/devel/doxygen-warnings.txt gives further clues
139 lines
3.7 KiB
C++
139 lines
3.7 KiB
C++
/*
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GTK-CANVAS-EXPERIMENT.hpp - Explore capabilities of the GTK canvas widget
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Copyright (C) Lumiera.org
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2016, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file gtk-canvas-experiment.hpp
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** A custom widget using a canvas to draw and to place widgets.
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** @remark as of 10/2018 we start to build a new timeline widget,
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** based on this technology demo.
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*/
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#ifndef RESEARCH_GTK_CANVAS_EXPERIMENT_H
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#define RESEARCH_GTK_CANVAS_EXPERIMENT_H
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#include "stage/gtk-base.hpp"
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#include <vector>
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namespace demo {
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/**
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* "experimental" child widget for investigation of Gtk::Layout
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*/
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class ChildEx
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: public Gtk::Button
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{
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static uint childNo;
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public:
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ChildEx();
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~ChildEx();
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private:
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void on_clicked() override;
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};
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void __verifyDeadChildren();
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/**
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* "experimental" custom canvas, based on Gtk::Layout.
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* In addition this customised widget supports direct drawing
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*/
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class Canvas
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: public Gtk::Layout
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{
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bool shallDraw_;
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bool recalcExtension_ = false;
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public:
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void enableDraw (bool);
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void adjustSize();
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private:
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virtual bool on_draw (Cairo::RefPtr<Cairo::Context> const&) override;
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void determineExtension();
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};
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/**
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* Dockable panel to hold timeline widget(s).
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* @todo build the actual implementation, after finishing the investigation
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*
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* # Investigation of gtk::GtkLayout
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* As of 10/2016, we start this task with an exploration of GTK behaviour
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*
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* \par Plan of investigation
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* 1. place some simple widgets (Buttons) ✔
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* 2. learn how to draw ✔
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* 3. place a huge number of widgets, to scrutinise scrolling and performance
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* 4. place widgets overlapping and irregularly, beyond the scrollable area ✔
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* 5. bind signals to those widgets, to verify event dispatching ✔
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* 6. bind some further signal(s) to the ~GtkLayout container
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* 7. hide and re-show a partially and a totally overlapped widget
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* 8. find a way to move a widget ✔ and delete arbitrary widgets ✔
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* 9. expand an existing widget (text change) ✔
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* 10. build a custom "clip" widget ✘
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* 11. retrofit all preceding tests to use this "clip" widget ✘
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*/
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class CanvasDemoPanel
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: public Gtk::Box
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{
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public:
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CanvasDemoPanel();
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private:
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Gtk::Box twoParts_;
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Gtk::ButtonBox buttons_;
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Gtk::Button button_1_;
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Gtk::Button button_2_;
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Gtk::Button button_3_;
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Gtk::Button button_4_;
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Gtk::Button button_5_;
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Gtk::CheckButton toggleDraw_;
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Gtk::Frame frame_;
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Gtk::ScrolledWindow scroller_;
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Canvas canvas_;
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ChildEx* makeChld();
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using ChildV = std::vector<ChildEx*>;
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ChildV childz_;
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void experiment_1();
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void experiment_2();
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void experiment_3();
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void experiment_4();
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void experiment_5();
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};
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}// namespace demo
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#endif /*RESEARCH_GTK_CANVAS_EXPERIMENT_H*/
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