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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <AK/Function.h>
30#include <AK/StdLibExtras.h>
31#include <LibGUI/Frame.h>
32
33class GlyphMapWidget final : public GUI::Frame {
34 C_OBJECT(GlyphMapWidget)
35public:
36 virtual ~GlyphMapWidget() override;
37
38 u8 selected_glyph() const { return m_selected_glyph; }
39 void set_selected_glyph(u8);
40
41 int rows() const { return ceil_div(m_glyph_count, m_columns); }
42 int columns() const { return m_columns; }
43
44 int preferred_width() const;
45 int preferred_height() const;
46
47 Gfx::Font& font() { return *m_font; }
48 const Gfx::Font& font() const { return *m_font; }
49
50 void update_glyph(u8);
51
52 Function<void(u8)> on_glyph_selected;
53
54private:
55 explicit GlyphMapWidget(Gfx::Font&);
56 virtual bool accepts_focus() const override { return true; }
57 virtual void paint_event(GUI::PaintEvent&) override;
58 virtual void mousedown_event(GUI::MouseEvent&) override;
59 virtual void keydown_event(GUI::KeyEvent&) override;
60
61 Gfx::Rect get_outer_rect(u8 glyph) const;
62
63 RefPtr<Gfx::Font> m_font;
64 int m_glyph_count { 256 };
65 int m_columns { 32 };
66 int m_horizontal_spacing { 2 };
67 int m_vertical_spacing { 2 };
68 u8 m_selected_glyph { 0 };
69};