winsys.cpp
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#include <ncurses.h>
#include <ctype.h>
#include <list>
#include <string>
#include "cpoint.h"
#include "screen.h"
using namespace std;
class CView {
protected:
CRect geom;
public:
CView(CRect g) : geom(g){};
virtual void paint() = 0;
virtual bool handleEvent(int key) = 0;
virtual void move(const CPoint& delta)
{
geom.topleft += delta;
};
virtual ~CView(){};
};
class CWindow : public CView {
protected:
char c;
public:
CWindow(CRect r, char _c = '*') : CView(r), c(_c){};
void paint()
{
for (int i = geom.topleft.y; i < geom.topleft.y + geom.size.y; i++) {
gotoyx(i, geom.topleft.x);
for (int j = 0; j < geom.size.x; j++)
printw("%c", c);
};
};
bool handleEvent(int key)
{
switch (key) {
case KEY_UP:
move(CPoint(0, -1));
return true;
case KEY_DOWN:
move(CPoint(0, 1));
return true;
case KEY_RIGHT:
move(CPoint(1, 0));
return true;
case KEY_LEFT:
move(CPoint(-1, 0));
return true;
};
return false;
};
};
class CFramedWindow : public CWindow {
public:
CFramedWindow(CRect r, char _c = '\'') : CWindow(r, _c){};
void paint()
{
for (int i = geom.topleft.y; i < geom.topleft.y + geom.size.y; i++) {
gotoyx(i, geom.topleft.x);
if ((i == geom.topleft.y) ||
(i == geom.topleft.y + geom.size.y - 1)) {
printw("+");
for (int j = 1; j < geom.size.x - 1; j++)
printw("-");
printw("+");
}
else {
printw("|");
for (int j = 1; j < geom.size.x - 1; j++)
printw("%c", c);
printw("|");
}
}
};
};
class CInputLine : public CFramedWindow {
string text;
public:
CInputLine(CRect r, char _c = ',') : CFramedWindow(r, _c){};
void paint()
{
CFramedWindow::paint();
gotoyx(geom.topleft.y + 1, geom.topleft.x + 1);
for (unsigned j = 1, i = 0;
(j + 1 < (unsigned)geom.size.x) && (i < text.length()); j++, i++)
printw("%c", text[i]);
};
bool handleEvent(int c)
{
if (CFramedWindow::handleEvent(c))
return true;
if ((c == KEY_DC) || (c == KEY_BACKSPACE)) {
if (text.length() > 0) {
text.erase(text.length() - 1);
return true;
};
}
if ((c > 255) || (c < 0))
return false;
if (!isalnum(c) && (c != ' '))
return false;
text.push_back(c);
return true;
}
};
class CGroup : public CView {
list<CView*> children;
public:
CGroup(CRect g) : CView(g){};
void paint()
{
for (CView* i : children)
i->paint();
};
bool handleEvent(int key)
{
if (!children.empty() && children.back()->handleEvent(key))
return true;
if (key == '\t') {
if (!children.empty()) {
children.push_front(children.back());
children.pop_back();
};
return true;
}
return false;
};
void insert(CView* v)
{
children.push_back(v);
};
~CGroup()
{
for (CView* i : children)
delete i;
};
};
class CDesktop : public CGroup {
public:
CDesktop() : CGroup(CRect())
{
int y, x;
init_screen();
getscreensize(y, x);
geom.size.x = x;
geom.size.y = y;
};
~CDesktop()
{
done_screen();
};
void paint()
{
for (int i = geom.topleft.y; i < geom.topleft.y + geom.size.y; i++) {
gotoyx(i, geom.topleft.x);
for (int j = 0; j < geom.size.x; j++)
printw(".");
};
CGroup::paint();
}
int getEvent()
{
return ngetch();
};
void run()
{
int c;
paint();
refresh();
while (1) {
c = getEvent();
if (c == 27) // ESC key
break;
if (handleEvent(c)) {
paint();
refresh();
};
};
};
};
int main()
{
CDesktop d;
d.insert(new CInputLine(CRect(CPoint(5, 7), CPoint(15, 15))));
d.insert(new CWindow(CRect(CPoint(2, 3), CPoint(20, 10)), '#'));
d.run();
return 0;
}