Resizing: re-draw at terminal resize

CMakeLists.txt

@@ -22,10 +22,7 @@ project(vis
  
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
 
-add_executable(vis 
-    src/main.cpp 
-    src/calendar.cpp
-    )
+add_subdirectory(src)
 
 find_library(NCURSES_LIB NAMES ncurses)
 target_link_libraries(vis ncurses)

src/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_subdirectory(engine) 
+add_subdirectory(calendar) 
+
+add_executable(vis main.cpp)
+
+target_link_libraries(vis engine) 
+target_link_libraries(vis calendar) 

src/calendar/CMakeLists.txt

@@ -0,0 +1 @@
+add_library(calendar SHARED calendar.cpp)

src/calendar/calendar.cpp

@@ -41,11 +41,15 @@ void Calendar::set_year(int year) {
         this->info.current_day = this->info.current_month_days; 
 }
 
+calendar_information Calendar::get_info() {
+    return this->info;
+}
+
 Calendar::Calendar(calendar_information *preinfo) {
     this->info = *preinfo; 
-        if (preinfo != nullptr) {
+
+    if (preinfo != nullptr)
         return; 
-    }
 
     this->info = calendar_information(); 
 }

src/calendar/calendar.hpp

@@ -1,3 +1,6 @@
+#ifndef CALENDAR_HPP
+#define CALENDAR_HPP 
+
 struct calendar_information {
     int current_day; 
     int current_month;
@@ -16,6 +19,8 @@ class Calendar {
         calendar_information get_info();
 
         Calendar(calendar_information *preinfo = nullptr); 
+
     private:
         calendar_information info; 
 }; 
+#endif

src/engine/CMakeLists.txt

@@ -0,0 +1 @@
+add_library(engine SHARED engine.cpp)

src/engine/engine.cpp

@@ -0,0 +1,42 @@
+#include <stdlib.h>
+#include <ncurses.h>
+#include "engine.hpp"
+
+Engine::Engine(int padding, calendar_view_mode view_mode) {
+    this->padding = padding;
+    this->view_mode = view_mode;
+    this->cells_table = std::vector<engine_child>();
+
+    calendar_information date_info = calendar_information();
+    this->calendar = new Calendar(&date_info);
+}
+
+Engine::~Engine() {
+    delete this->calendar;
+}
+
+void Engine::draw(WINDOW *win) {
+    this->cells_table.clear(); 
+
+    box(win, 0, 0);
+
+    calendar_information date_info = this->calendar->get_info();
+
+    
+    switch (this->view_mode) {
+        case MONTH_VIEW:
+            for (int i = 1; i <= date_info.current_month_days; i++) 
+                mvwprintw(win, i, 3, "D%d", i);
+            break;
+        case MONTHS_VIEW:
+            for (int i = 1; i <= 12; i++) 
+                wprintw(win, "M%d", i);
+            break;
+    }
+
+    wprintw(win, "\n");
+
+    mvwprintw(win, LINES-1, 0, "Year: %d, Month: %d, Day: %d", date_info.current_year, date_info.current_month, date_info.current_day);
+
+    wrefresh(win);
+}

src/engine/engine.hpp

@@ -0,0 +1,37 @@
+#ifndef ENGINE_HPP 
+#define ENGINE_HPP 
+
+#include <ncurses.h>
+#include <vector>
+#include "../calendar/calendar.hpp"
+
+struct engine_child {
+    int x; 
+    int y;
+};
+
+enum calendar_view_mode {
+    MONTH_VIEW = 0, 
+    MONTHS_VIEW,
+};
+
+// title: drawing engine
+// description: use for drawing the TUI and interact with the cells
+class Engine {
+    public: 
+        Engine(int padding = 10, calendar_view_mode view_mode = MONTH_VIEW);
+        ~Engine();
+
+        void draw(WINDOW *win);
+
+        Calendar *calendar; 
+
+        calendar_view_mode view_mode; 
+        int padding; // padding
+        
+    private:
+        std::vector<engine_child> cells_table;
+
+};
+
+#endif

src/main.cpp

@@ -1,23 +1,72 @@
 #include <iostream>
 #include <string.h>
+#include <signal.h>
 #include <ncurses.h>
-#include <curses.h>
-#include "calendar.hpp"
+#include "calendar/calendar.hpp"
+#include "engine/engine.hpp"
 
-#define MIN_WIDTH 100
-#define MIN_HEIGHT 40
+Engine engine = Engine(10, MONTH_VIEW);
+WINDOW *main_win; 
 
-using namespace std; 
+void sig_winch(int sig) {
+    if (isendwin()) return;
+    endwin();
+    wclear(main_win);
+    wrefresh(main_win);
+
+    wresize(main_win, LINES, COLS);
+
+    // redraw the TUI after the resize signal
+    engine.draw(main_win);
+
+    flushinp();
+}
+
+void signals() {
+    signal(SIGWINCH, sig_winch);
+}
 
 int main() {
     initscr();
+    refresh();
+    noecho();
 
-    int active_cell = 0; 
+    main_win = newwin(LINES, COLS, 0, 0);
+
+    // handle required signals 
+    signals();
 
     for (;;) {
+        wclear(main_win);
+        wrefresh(main_win);
+        engine.draw(main_win);
        
-        refresh(); 
+        char ch = getch();
+        int month;
+        switch (ch) {
+            case 'k': 
+                month = engine.calendar->get_info().current_month;
+                if (month >= 12) {
+                    month = 12; 
+                    break;
                 }
 
+                engine.calendar->set_month(++month);
+                break;
+            case 'j': 
+                month = engine.calendar->get_info().current_month;
+                if (month <= 1) {
+                    month = 1; 
+                    break;
+                }
+
+                engine.calendar->set_month(--month);
+                break;
+        }
+    }
+
+
+    endwin();
+
     return 0; 
 }