gri3-wm/src/resize.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
* resize.c: Interactive resizing.
*
*/
#include "all.h"
extern xcb_connection_t *conn;
/*
* This is an ugly data structure which we need because there is no standard
* way of having nested functions (only available as a gcc extension at the
* moment, clang doesnt support it) or blocks (only available as a clang
* extension and only on Mac OS X systems at the moment).
*
*/
struct callback_params {
orientation_t orientation;
Con *output;
xcb_window_t helpwin;
uint32_t *new_position;
};
DRAGGING_CB(resize_callback) {
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const struct callback_params *params = extra;
Con *output = params->output;
DLOG("new x = %d, y = %d\n", new_x, new_y);
if (params->orientation == HORIZ) {
/* Check if the new coordinates are within screen boundaries */
if (new_x > (output->rect.x + output->rect.width - 25) ||
new_x < (output->rect.x + 25))
return;
*(params->new_position) = new_x;
xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_X, params->new_position);
} else {
if (new_y > (output->rect.y + output->rect.height - 25) ||
new_y < (output->rect.y + 25))
return;
*(params->new_position) = new_y;
xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_Y, params->new_position);
}
xcb_flush(conn);
}
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int resize_graphical_handler(Con *first, Con *second, orientation_t orientation, const xcb_button_press_event_t *event) {
DLOG("resize handler\n");
uint32_t new_position;
/* TODO: previously, we were getting a rect containing all screens. why? */
Con *output = con_get_output(first);
DLOG("x = %d, width = %d\n", output->rect.x, output->rect.width);
uint32_t mask = 0;
uint32_t values[2];
mask = XCB_CW_OVERRIDE_REDIRECT;
values[0] = 1;
/* Open a new window, the resizebar. Grab the pointer and move the window around
as the user moves the pointer. */
xcb_window_t grabwin = create_window(conn, output->rect, XCB_WINDOW_CLASS_INPUT_ONLY, XCURSOR_CURSOR_POINTER, true, mask, values);
Rect helprect;
if (orientation == HORIZ) {
helprect.x = event->root_x;
helprect.y = output->rect.y;
helprect.width = 2;
helprect.height = output->rect.height;
new_position = event->root_x;
} else {
helprect.x = output->rect.x;
helprect.y = event->root_y;
helprect.width = output->rect.width;
helprect.height = 2;
new_position = event->root_y;
}
mask = XCB_CW_BACK_PIXEL;
values[0] = config.client.focused.border;
mask |= XCB_CW_OVERRIDE_REDIRECT;
values[1] = 1;
xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
(orientation == HORIZ ?
XCURSOR_CURSOR_RESIZE_HORIZONTAL :
XCURSOR_CURSOR_RESIZE_VERTICAL), true, mask, values);
xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
xcb_flush(conn);
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const struct callback_params params = { orientation, output, helpwin, &new_position };
drag_pointer(NULL, event, grabwin, BORDER_TOP, resize_callback, &params);
xcb_destroy_window(conn, helpwin);
xcb_destroy_window(conn, grabwin);
xcb_flush(conn);
int pixels;
if (orientation == HORIZ)
pixels = (new_position - event->root_x);
else pixels = (new_position - event->root_y);
DLOG("Done, pixels = %d\n", pixels);
// if we got thus far, the containers must have
// percentages associated with them
assert(first->percent > 0.0);
assert(second->percent > 0.0);
// calculate the new percentage for the first container
double new_percent, difference;
double percent = first->percent;
DLOG("percent = %f\n", percent);
int original = (orientation == HORIZ ? first->rect.width : first->rect.height);
DLOG("original = %d\n", original);
new_percent = (original + pixels) * (percent / original);
difference = percent - new_percent;
DLOG("difference = %f\n", difference);
DLOG("new percent = %f\n", new_percent);
first->percent = new_percent;
// calculate the new percentage for the second container
double s_percent = second->percent;
second->percent = s_percent + difference;
DLOG("second->percent = %f\n", second->percent);
// now we must make sure that the sum of the percentages remain 1.0
con_fix_percent(first->parent);
return 0;
}