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