displayLayout and Rendering TUI library |
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navig.cpp (4586B)
1 #include <iostream> 2 #include <stack> 3 #include <string> 4 5 #include "display/display.hpp" 6 #include "display/layout.hpp" 7 #include "display/window_pivot.hpp" 8 #include "menu.hpp" 9 10 namespace 11 { 12 13 bool is_finished = false; // NOLINT 14 15 using display::WindowPivot; 16 17 class WindowCustom : public WindowPivot 18 { 19 public: 20 WindowCustom(display::plc_t aplc, 21 display::piv_t piv, 22 const example::menu_t& menu) 23 : WindowPivot(aplc, {4, 2, 5, 4}, piv, calc_dim(menu)) 24 , m_menu(menu) 25 { 26 } 27 28 void render() const override 29 { 30 std::cout << alec::background_v<alec::Color::BLUE>; 31 line_reset(); 32 33 line_center(m_menu.title); 34 line_empty(); 35 for (std::size_t i = 0; i < m_menu.items.size(); i++) { 36 if (m_selected == i) { 37 std::cout << alec::foreground_v<alec::Color::GREEN>; 38 } 39 40 line_right(m_menu.items[i].prompt); 41 42 if (m_selected == i) { 43 std::cout << alec::foreground_v<alec::Color::DEFAULT>; 44 } 45 } 46 47 WindowPivot::render(); 48 WindowPivot::render_border(); 49 50 std::cout << alec::background_v<alec::Color::DEFAULT>; 51 std::cout << std::flush; 52 } 53 54 void input(display::event& evnt) override 55 { 56 if (evnt.type() != display::event::Type::KEY) { 57 return; 58 } 59 60 if (evnt.key() == 'j') { 61 if (m_selected + 1 < m_menu.items.size()) { 62 m_selected++; 63 } 64 evnt.type() = display::event::Type::NONE; 65 render(); 66 return; 67 } 68 69 if (evnt.key() == 'k') { 70 if (m_selected > 0) { 71 m_selected--; 72 } 73 evnt.type() = display::event::Type::NONE; 74 render(); 75 return; 76 } 77 78 if (evnt.key() == 'l') { 79 m_menu.items[m_selected].callback(m_selected); 80 evnt.type() = display::event::Type::NONE; 81 return; 82 } 83 84 if (evnt.key() == 'h') { 85 m_menu.callback(0); 86 evnt.type() = display::event::Type::NONE; 87 return; 88 } 89 } 90 91 private: 92 static display::dim_t calc_dim(const example::menu_t& menu) 93 { 94 std::size_t width = menu.title.size(); 95 for (const auto& item : menu.items) { 96 width = std::max(width, item.prompt.size()); 97 } 98 99 return {display::wth_t(width), display::hgt_t(menu.items.size() + 2)}; 100 } 101 102 example::menu_t m_menu; 103 uint8_t m_selected = 0; 104 }; 105 106 } // namespace 107 108 namespace example 109 { 110 111 int operation1(std::size_t /* unused */) // NOLINT 112 { 113 std::cout << alec::cursor_position(1, 1) << "operation 1"; 114 std::cout << alec::cursor_position(2, 1) 115 << alec::erase_line_v<alec::Motion::WHOLE> 116 << "Some operation is done"; 117 std::cout << std::flush; 118 return 1; 119 } 120 121 int operation2(std::size_t /* unused */) // NOLINT 122 { 123 std::cout << alec::cursor_position(1, 1) << "operation 2"; 124 std::cout << alec::cursor_position(2, 1) 125 << alec::erase_line_v<alec::Motion::WHOLE> 126 << "Some other operation is done"; 127 std::cout << std::flush; 128 return 1; 129 } 130 131 int operation3(std::size_t /* unused */) // NOLINT 132 { 133 std::cout << alec::cursor_position(1, 1) << "operation 3"; 134 std::cout << alec::cursor_position(2, 1) 135 << alec::erase_line_v<alec::Motion::WHOLE> 136 << "Yet another operation is done"; 137 std::cout << std::flush; 138 return 1; 139 } 140 141 int finish(std::size_t /* unused */) // NOLINT 142 { 143 std::cout << alec::cursor_position(1, 1) 144 << alec::erase_line_v<alec::Motion::WHOLE>; 145 std::cout << "finishing..."; 146 std::cout << std::flush; 147 is_finished = true; 148 return 0; 149 } 150 151 int menu_t::visit(const menu_t& menu) 152 { 153 using display::Display, display::Layout; 154 using display::PvtX, display::PvtY, display::piv_t; 155 156 auto& layout = Display::display().layout(); 157 158 static std::stack<const menu_t*> stk; 159 160 if (!stk.empty() && stk.top()->title == menu.title) { 161 stk.pop(); 162 if (stk.empty()) { 163 finish(0); 164 return 0; 165 } 166 } else { 167 stk.push(&menu); 168 } 169 170 layout.set_child<WindowCustom>(piv_t(PvtX::Right, PvtY::Bottom), *stk.top()); 171 layout.render(); 172 173 return 0; 174 } 175 176 } // namespace example 177 178 int main() 179 { 180 try { 181 using namespace display; // NOLINT 182 183 auto& display = Display::display(); 184 example::menu_main(0); 185 186 while (!is_finished) { 187 auto evnt = display.get_event(); 188 if (evnt.type() == event::Type::RESIZE) { 189 std::cout << alec::erase_display_v<alec::Motion::WHOLE>; 190 display.render(); 191 continue; 192 } 193 194 if (evnt.type() == event::Type::KEY) { 195 if (evnt.key() == 'q') { 196 break; 197 } 198 display.input(evnt); 199 } 200 } 201 } catch (std::exception& err) { 202 std::cout << err.what() << '\n' << std::flush; 203 } 204 205 return 0; 206 }