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Maps: Add new basic maps application and map widget

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Bastiaan van der Plaat 2023-09-03 13:13:58 +02:00 • committed by Jelle Raaijmakers
parent 50d72f0d8c
commit f9f9c38de3
6 changed files with 503 additions and 0 deletions
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128
Userland/Applications/Maps/MapWidget.h Normal file
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/*
* Copyright (c) 2023, Bastiaan van der Plaat <bastiaan.v.d.plaat@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibGUI/Painter.h>
#include <LibGUI/Widget.h>
#include <LibProtocol/Request.h>
#include <LibProtocol/RequestClient.h>
class MapWidget final : public GUI::Widget {
C_OBJECT(MapWidget);
public:
struct LatLng {
double latitude;
double longitude;
double distance_to(LatLng const& other) const;
};
struct Options {
String tile_layer_url { "https://tile.openstreetmap.org/{}/{}/{}.png"_string };
LatLng center;
int zoom;
bool scale_enabled { true };
int scale_max_width { 100 };
bool attribution_enabled { true };
String attribution_text { "© OpenStreetMap contributors"_string };
URL attribution_url { "https://www.openstreetmap.org/copyright"sv };
};
LatLng center() const { return m_center; }
void set_center(LatLng const& center)
{
m_center = {
min(max(center.latitude, -LATITUDE_MAX), LATITUDE_MAX),
min(max(center.longitude, -180.0), 180.0)
};
update();
}
int zoom() const { return m_zoom; }
void set_zoom(int zoom)
{
m_zoom = min(max(zoom, ZOOM_MIN), ZOOM_MAX);
update();
}
struct TileKey {
int x;
int y;
int zoom;
unsigned hash() const
{
return pair_int_hash(x, pair_int_hash(y, zoom));
}
bool operator==(TileKey const& other) const
{
return x == other.x && y == other.y && zoom == other.zoom;
}
};
private:
MapWidget(Options const&);
virtual void mousemove_event(GUI::MouseEvent&) override;
virtual void mousedown_event(GUI::MouseEvent&) override;
virtual void mouseup_event(GUI::MouseEvent&) override;
virtual void mousewheel_event(GUI::MouseEvent&) override;
virtual void paint_event(GUI::PaintEvent&) override;
Optional<RefPtr<Gfx::Bitmap>> get_tile_image(int x, int y);
void paint_tiles(GUI::Painter&);
void paint_scale_line(GUI::Painter&, String label, Gfx::IntRect rect);
void paint_scale(GUI::Painter&);
void paint_attribution(GUI::Painter&);
static int constexpr TILE_SIZE = 256;
static double constexpr LATITUDE_MAX = 85.0511287798066;
static size_t constexpr TILES_CACHE_MAX = 256;
static int constexpr ZOOM_MIN = 2;
static int constexpr ZOOM_MAX = 19;
static float constexpr PANEL_PADDING_X = 6;
static float constexpr PANEL_PADDING_Y = 4;
// These colors match the default OpenStreetMap map tiles style, so they don't depend on any system theme colors
static Gfx::Color constexpr map_background_color = { 200, 200, 200 };
static Gfx::Color constexpr panel_background_color = { 255, 255, 255, 204 };
static Gfx::Color constexpr panel_foreground_color = { 51, 51, 51 };
RefPtr<Protocol::RequestClient> m_request_client;
Vector<RefPtr<Protocol::Request>> m_active_requests;
String m_tile_layer_url;
LatLng m_center;
int m_zoom {};
bool m_scale_enabled {};
int m_scale_max_width {};
bool m_attribution_enabled {};
String m_attribution_text;
float m_attribution_width {};
float m_attribution_height {};
URL m_attribution_url;
bool m_dragging { false };
int m_last_mouse_x { 0 };
int m_last_mouse_y { 0 };
bool m_first_image_loaded { false };
bool m_connection_failed { false };
OrderedHashMap<TileKey, RefPtr<Gfx::Bitmap>> m_tiles;
};
template<>
struct AK::Traits<MapWidget::TileKey> : public GenericTraits<MapWidget::TileKey> {
static unsigned hash(MapWidget::TileKey const& t) { return t.hash(); }
};