basic ui

driver/ui/view.cpp

@@ -0,0 +1,58 @@
+#include "view.h"
+
+WINDOW* View::win = nullptr;
+
+View::View()
+{
+	if(!win)
+		throw std::runtime_error("View::win not initialized, missing context!");
+	getmaxyx(win, height, width); // init width and height	
+	keypad(win, TRUE);
+}
+
+void View::setWinContext(WINDOW* win)
+{
+	View::win = win;
+}
+
+WINDOW* View::getWinContext()
+{
+	return win;
+}
+
+void View::addCall(std::function<void(int)> call)
+{
+	calls.push_back(call);
+}
+
+void View::setTitle(std::string title)
+{
+	this->title = title;
+}
+
+void View::repaint()
+{
+	// get screen size
+	struct winsize size;	
+	if (ioctl(0, TIOCGWINSZ, (char *) &size) < 0)
+		throw std::runtime_error("TIOCGWINSZ error");
+	
+	
+	start_x = floor((size.ws_col - width) / 2.);
+	start_y = floor((size.ws_row - height) / 2.);
+	
+	mvwin(win, start_y, start_x);
+
+	wclear(win);
+	
+	// generic draw
+	box(win, 0, 0);
+	int offset_x = (width - title.length()) / 2;
+	mvwprintw(win, 1, offset_x, "%s", title.c_str());
+	
+	// specific draw
+	draw();
+
+	refresh();
+	wrefresh(win);
+}

driver/ui/view.h

@@ -0,0 +1,42 @@
+#ifndef VIEW_H
+#define VIEW_H
+
+#include <iostream>
+#include <cmath>
+#include <vector>
+#include <functional>
+#include <ncurses.h> // sudo apt-get install libncurses5-dev
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+class View
+{
+public:
+	View(void);
+	
+	static void setWinContext(WINDOW* win);
+	static WINDOW* getWinContext(void);
+
+	virtual void addCall(std::function<void(int)> call);
+	
+	void setSize(int width, int height);
+	void setTitle(std::string title);
+	
+	virtual void repaint(void);
+	
+	virtual void draw(void) = 0;
+	virtual std::function<void(int)> keypress(int& key) = 0;
+	
+	
+protected:
+	int width, height;
+	int start_x = 0, start_y = 0;
+	std::string title;
+	std::vector<std::function<void(int)>> calls;
+	
+	constexpr static int KEY_ENT = 10;
+	
+	static WINDOW* win;
+};
+
+#endif // VIEW_H

driver/ui/view_info.cpp

@@ -0,0 +1,33 @@
+#include "view_info.h"
+
+ViewInfo::ViewInfo()
+{
+}
+
+void ViewInfo::draw()
+{
+	mvwprintw(win, text_offset_y, text_offset_x, "%s", "hello");
+}
+
+std::function<void(int)> ViewInfo::keypress(int& key)
+{
+	std::function<void(int)> ret = nullptr;
+	switch(key)
+	{
+		
+		case KEY_MOUSE:
+		{
+			// http://pronix.linuxdelta.de/C/Linuxprogrammierung/Linuxsystemprogrammieren_C_Kurs_Kapitel10b.shtml
+			MEVENT event;
+			if(getmouse(&event) == OK && event.bstate & BUTTON1_CLICKED)
+				key = -1; // do return from view
+			break;
+		}
+		case KEY_ENT:
+			key = -1; // do return from view
+			break;
+		default:
+			break;
+	}
+	return ret;
+}

driver/ui/view_info.h

@@ -0,0 +1,18 @@
+#ifndef VIEW_INFO
+#define VIEW_INFO
+
+#include "view.h"
+
+class ViewInfo : public View
+{
+public:
+	ViewInfo(void);
+	virtual void draw(void) override;
+	virtual std::function<void(int)> keypress(int& key) override;
+
+private:
+	constexpr static int text_offset_x = 2;
+	constexpr static int text_offset_y = 3;
+};
+
+#endif // VIEW_INFO

driver/ui/view_main.cpp

@@ -0,0 +1,62 @@
+#include "view_main.h"
+
+void ViewMain::draw()
+{
+	
+	for(size_t i = 0; i < choices.size(); i++)
+	{
+		if(selection == i)
+			wattron(win, A_REVERSE);
+		mvwprintw(win, i + choice_offset_y, choice_offset_x, "%s", choices[i].c_str());
+		if(selection == i)
+			wattroff(win, A_REVERSE);		
+	}
+}
+
+std::function<void(int)> ViewMain::keypress(int& key)
+{
+	std::function<void(int)> ret = nullptr;
+	switch(key)
+	{
+		case KEY_UP:
+			selection = (selection - 1) % choices.size();
+			break;
+		case KEY_DOWN:
+			selection = (selection + 1) % choices.size();
+			break;
+		case KEY_MOUSE:
+		{
+			// http://pronix.linuxdelta.de/C/Linuxprogrammierung/Linuxsystemprogrammieren_C_Kurs_Kapitel10b.shtml
+			MEVENT event;
+			bool hit = false;
+			if(getmouse(&event) == OK && event.bstate & (BUTTON1_CLICKED | BUTTON1_DOUBLE_CLICKED))
+			{
+				size_t column_start = start_x + choice_offset_x;
+				size_t row_start = start_y + choice_offset_y;
+				size_t mouse_x = event.x, mouse_y = event.y;
+				for(size_t i = 0; i < choices.size(); i++)
+					if(mouse_y == row_start + i && mouse_x >= column_start && mouse_x < column_start + choices[i].length())
+					{
+						if(selection == i || event.bstate & BUTTON1_DOUBLE_CLICKED)
+							hit = true;
+						selection = i;
+					}
+			}
+			if(!hit)
+				break;
+			
+			// fall through to next case
+			__attribute__ ((fallthrough));
+		}
+		case KEY_ENT:
+			if(selection == choices.size() - 1) // exit
+				key = -1; // do return from view
+			else
+				ret = calls[selection];			
+			break;
+		default:
+			break;
+	}
+	repaint();
+	return ret;
+}

driver/ui/view_main.h

@@ -0,0 +1,24 @@
+#ifndef VIEW_MAIN_H
+#define VIEW_MAIN_H
+
+#include <vector>
+#include <string>
+#include "view.h"
+
+class ViewMain : public View
+{
+public:
+	virtual void draw(void) override;
+	virtual std::function<void(int)> keypress(int& key) override;
+
+private:
+	constexpr static int choice_offset_x = 2;
+	constexpr static int choice_offset_y = 3;
+	size_t selection = 0;
+	const std::vector<std::string> choices = {
+		"Beobachten",
+		"Exit"
+	};
+};
+
+#endif // VIEW_MAIN_H