Category : Files from Magazines
Archive : DFPP01.ZIP
Filename : MOUSE.CPP
Output of file : MOUSE.CPP contained in archive : DFPP01.ZIP
#include
#include "desktop.h"
// -------- mouse constructor
Mouse::Mouse()
{
// ------- see if mouse driver is installed
unsigned char far *ms;
ms = (unsigned char far *)
MK_FP(peek(0, MOUSE*4+2), peek(0, MOUSE*4));
// --- if the interrupt vector is null or points to a retf,
// the mouse driver is not installed
installed = (Bool) (ms != NULL && *ms != 0xcf);
if (installed) {
// --- get the mouse state buffer size
CallMouse(BUFFSIZE);
statebuffer = new char[regs.x.bx];
// --- save the mouse state
CallMouse(SAVESTATE, 0, 0,
FP_OFF(statebuffer), FP_SEG(statebuffer));
// --- reset the mouse
CallMouse(RESETMOUSE);
prevx = prevy =
clickx = clicky =
releasex = releasey -1;
SetTravel(0, desktop.screen().Width()-1, 0,
desktop.screen().Height()-1);
}
}
Mouse::~Mouse()
{
if (installed) {
Hide();
// --- restore the mouse state
CallMouse(RESTORESTATE, 0, 0,
FP_OFF(statebuffer), FP_SEG(statebuffer));
delete [] statebuffer;
}
}
void Mouse::GetPosition(int &mx, int &my)
{
mx = my = 0;
if (installed) {
CallMouse(READMOUSE);
mx = regs.x.cx/8;
my = regs.x.dx/8;
if (desktop.screen().Width() == 40)
mx /= 2;
}
}
void Mouse::SetPosition(int x, int y)
{
if (installed) {
if (desktop.screen().Width() == 40)
x *= 2;
CallMouse(SETPOSITION,0,x*8,y*8);
}
}
Bool Mouse::Moved()
{
int x, y;
Bool rtn = False;
if (installed) {
GetPosition(x, y);
rtn = (Bool) (x != prevx || y != prevy);
prevx = x;
prevy = y;
}
return rtn;
}
void Mouse::Show()
{
if (installed)
CallMouse(SHOWMOUSE);
}
void Mouse::Hide()
{
if (installed)
CallMouse(HIDEMOUSE);
}
Bool Mouse::LeftButton()
{
Bool rtn = False;
if (installed) {
CallMouse(READMOUSE);
rtn = (Bool) ((regs.x.bx & 1) == 1);
}
return rtn;
}
Bool Mouse::ButtonReleased()
{
Bool rtn = False;
if (installed) {
CallMouse(BUTTONRELEASED);
rtn = (Bool) (regs.x.bx != 0);
}
return rtn;
}
void Mouse::SetTravel(int minx, int maxx, int miny, int maxy)
{
if (installed) {
if (desktop.screen().Width() == 40) {
minx *= 2;
maxx *= 2;
}
CallMouse(XLIMIT, 0, minx*8, maxx*8);
CallMouse(YLIMIT, 0, miny*8, maxy*8);
}
}
void Mouse::CallMouse(int m1,int m2,int m3,int m4, unsigned es)
{
struct SREGS sregs;
segread(&sregs);
if (es != 0)
sregs.es = es;
regs.x.dx = m4;
regs.x.cx = m3;
regs.x.bx = m2;
regs.x.ax = m1;
int86x(MOUSE, ®s, ®s, &sregs);
}
// ------ get the window to send mouse events
DFWindow *Mouse::MouseWindow(int mx, int my)
{
DFWindow *Mwnd;
if (desktop.FocusCapture() != NULL)
Mwnd = desktop.FocusCapture();
else
Mwnd = inWindow(mx, my);
return Mwnd;
}
void Mouse::DispatchRelease()
{
if (ButtonReleased()) {
int mx, my;
GetPosition(mx, my);
DFWindow *Mwnd;
if ((Mwnd = MouseWindow(mx, my)) == NULL)
return;
// ------- disable typematic check
clickx = clicky = -1;
delaytimer.DisableTimer();
// ------- the button was released
if (mx == releasex && my == releasey)
// ---- same position as last left button release
if (doubletimer.TimerRunning())
// -- second click before double timeout
Mwnd->DoubleClick(mx, my);
doubletimer.SetTimer(DOUBLETICKS);
Mwnd->ButtonReleased(mx, my);
releasex = mx;
releasey = my;
}
}
void Mouse::DispatchMove()
{
if (Moved()) {
int mx, my;
GetPosition(mx, my);
DFWindow *Mwnd;
if ((Mwnd = MouseWindow(mx, my)) != NULL) {
Mwnd->MouseMoved(mx, my);
clickx = clicky = -1;
}
}
}
void Mouse::DispatchLeftButton()
{
if (LeftButton()) {
int mx, my;
GetPosition(mx, my);
DFWindow *Mwnd;
if ((Mwnd = MouseWindow(mx, my)) == NULL)
return;
if (mx == clickx && my == clicky) {
if (delaytimer.TimedOut()) {
// ---- button held down a while
delaytimer.SetTimer(DELAYTICKS);
// ---- post a typematic-like button
Mwnd->LeftButton(mx, my);
}
}
else {
// --------- new button press
delaytimer.SetTimer(FIRSTDELAY);
if (Mwnd->SetFocus())
Mwnd->LeftButton(mx, my);
clickx = mx;
clicky = my;
}
}
}
// -------- dispatch mouse events
void Mouse::DispatchEvent()
{
DispatchRelease();
DispatchMove();
DispatchLeftButton();
}
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