ewm is a tiling window manager for X based on dwm
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ewm/mouse.c

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/*
* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
* (C)opyright MMVI Kris Maglione <fbsdaemon@gmail.com>
* See LICENSE file for license details.
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "wm.h"
#define ButtonMask (ButtonPressMask | ButtonReleaseMask)
#define MouseMask (ButtonMask | PointerMotionMask)
static void
mmatch(Client *c, int x1, int y1, int x2, int y2)
{
c->w = abs(x1 - x2);
c->h = abs(y1 - y2);
if(c->incw)
c->w -= (c->w - c->basew) % c->incw;
if(c->inch)
c->h -= (c->h - c->baseh) % c->inch;
if(c->minw && c->w < c->minw)
c->w = c->minw;
if(c->minh && c->h < c->minh)
c->h = c->minh;
if(c->maxw && c->w > c->maxw)
c->w = c->maxw;
if(c->maxh && c->h > c->maxh)
c->h = c->maxh;
c->x = (x1 <= x2) ? x1 : x1 - c->w;
c->y = (y1 <= y2) ? y1 : y1 - c->h;
}
void
mresize(Client *c)
{
XEvent ev;
int old_cx, old_cy;
old_cx = c->x;
old_cy = c->y;
if(XGrabPointer(dpy, root, False, MouseMask, GrabModeAsync, GrabModeAsync,
None, cursor[CurResize], CurrentTime) != GrabSuccess)
return;
XGrabServer(dpy);
XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w, c->h);
for(;;) {
XMaskEvent(dpy, MouseMask, &ev);
switch(ev.type) {
default: break;
case MotionNotify:
XUngrabServer(dpy);
mmatch(c, old_cx, old_cy, ev.xmotion.x, ev.xmotion.y);
XResizeWindow(dpy, c->win, c->w, c->h);
XGrabServer(dpy);
break;
case ButtonRelease:
resize(c);
XUngrabServer(dpy);
XUngrabPointer(dpy, CurrentTime);
return;
}
}
}
void
mmove(Client *c)
{
XEvent ev;
int x1, y1, old_cx, old_cy, di;
unsigned int dui;
Window dummy;
old_cx = c->x;
old_cy = c->y;
if(XGrabPointer(dpy, root, False, MouseMask, GrabModeAsync, GrabModeAsync,
None, cursor[CurMove], CurrentTime) != GrabSuccess)
return;
XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
XGrabServer(dpy);
for(;;) {
XMaskEvent(dpy, MouseMask, &ev);
switch (ev.type) {
default: break;
case MotionNotify:
XUngrabServer(dpy);
c->x = old_cx + (ev.xmotion.x - x1);
c->y = old_cy + (ev.xmotion.y - y1);
XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
XGrabServer(dpy);
break;
case ButtonRelease:
resize(c);
XUngrabServer(dpy);
XUngrabPointer(dpy, CurrentTime);
return;
}
}
}