afac1e86bb
This patch improves the decorator in two ways. First, it enables the assignment of window colors depending on the window labels. This configuration can be changed dynamically. Second, it adds the handling of window controls for closing, maximizing, minimizing windows. Issue #1689 Fixes #1688
118 lines
2.4 KiB
C++
118 lines
2.4 KiB
C++
/*
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* \brief Graphics back end for example window decorator
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* \author Norman Feske
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* \date 2014-01-10
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*/
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/*
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* Copyright (C) 2014 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _CANVAS_H_
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#define _CANVAS_H_
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/* Painters of the nitpicker and scout graphics backends */
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#include <nitpicker_gfx/text_painter.h>
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#include <nitpicker_gfx/box_painter.h>
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#include <scout_gfx/icon_painter.h>
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/* decorator includes */
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#include <decorator/types.h>
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namespace Decorator {
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typedef Text_painter::Font Font;
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Font &default_font();
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enum Texture_id {
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TEXTURE_ID_CLOSER,
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TEXTURE_ID_MINIMIZE,
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TEXTURE_ID_MAXIMIZE,
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TEXTURE_ID_WINDOWED
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};
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Genode::Texture_base const &texture_by_id(Texture_id);
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class Canvas_base;
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template <typename PT> class Canvas;
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class Clip_guard;
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}
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/**
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* Abstract interface of graphics back end
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*/
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struct Decorator::Canvas_base
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{
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virtual Rect clip() const = 0;
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virtual void clip(Rect) = 0;
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virtual void draw_box(Rect, Color) = 0;
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virtual void draw_text(Point, Font const &, Color, char const *) = 0;
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virtual void draw_texture(Point, Texture_id) = 0;
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};
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template <typename PT>
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class Decorator::Canvas : public Decorator::Canvas_base
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{
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private:
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Genode::Surface<PT> _surface;
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public:
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Canvas(PT *base, Area size) : _surface(base, size) { }
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Rect clip() const override { return _surface.clip(); }
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void clip(Rect rect) override { _surface.clip(rect); }
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void draw_box(Rect rect, Color color) override
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{
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Box_painter::paint(_surface, rect, color);
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}
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void draw_text(Point pos, Font const &font,
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Color color, char const *string) override
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{
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Text_painter::paint(_surface, pos, font, color, string);
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}
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void draw_texture(Point pos, Texture_id id)
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{
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Genode::Texture<PT> const &texture =
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static_cast<Genode::Texture<PT> const &>(texture_by_id(id));
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unsigned const alpha = 255;
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Icon_painter::paint(_surface, Rect(pos, texture.size()), texture, alpha);
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}
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};
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class Decorator::Clip_guard : Rect
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{
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private:
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Canvas_base &_canvas;
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Rect const _orig_rect;
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public:
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Clip_guard(Canvas_base &canvas, Rect clip_rect)
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:
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_canvas(canvas), _orig_rect(canvas.clip())
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{
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_canvas.clip(Rect::intersect(_orig_rect, clip_rect));
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}
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~Clip_guard() { _canvas.clip(_orig_rect); }
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};
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#endif /* _CANVAS_H_ */
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