i3
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00001 /* 00002 * vim:ts=4:sw=4:expandtab 00003 * 00004 * i3 - an improved dynamic tiling window manager 00005 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE) 00006 * 00007 * resize.c: Interactive resizing. 00008 * 00009 */ 00010 #include "all.h" 00011 00012 extern xcb_connection_t *conn; 00013 00014 /* 00015 * This is an ugly data structure which we need because there is no standard 00016 * way of having nested functions (only available as a gcc extension at the 00017 * moment, clang doesn’t support it) or blocks (only available as a clang 00018 * extension and only on Mac OS X systems at the moment). 00019 * 00020 */ 00021 struct callback_params { 00022 orientation_t orientation; 00023 Con *output; 00024 xcb_window_t helpwin; 00025 uint32_t *new_position; 00026 }; 00027 00028 DRAGGING_CB(resize_callback) { 00029 const struct callback_params *params = extra; 00030 Con *output = params->output; 00031 DLOG("new x = %d, y = %d\n", new_x, new_y); 00032 if (params->orientation == HORIZ) { 00033 /* Check if the new coordinates are within screen boundaries */ 00034 if (new_x > (output->rect.x + output->rect.width - 25) || 00035 new_x < (output->rect.x + 25)) 00036 return; 00037 00038 *(params->new_position) = new_x; 00039 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_X, params->new_position); 00040 } else { 00041 if (new_y > (output->rect.y + output->rect.height - 25) || 00042 new_y < (output->rect.y + 25)) 00043 return; 00044 00045 *(params->new_position) = new_y; 00046 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_Y, params->new_position); 00047 } 00048 00049 xcb_flush(conn); 00050 } 00051 00052 int resize_graphical_handler(Con *first, Con *second, orientation_t orientation, const xcb_button_press_event_t *event) { 00053 DLOG("resize handler\n"); 00054 00055 uint32_t new_position; 00056 00057 /* TODO: previously, we were getting a rect containing all screens. why? */ 00058 Con *output = con_get_output(first); 00059 DLOG("x = %d, width = %d\n", output->rect.x, output->rect.width); 00060 00061 x_mask_event_mask(~XCB_EVENT_MASK_ENTER_WINDOW); 00062 xcb_flush(conn); 00063 00064 uint32_t mask = 0; 00065 uint32_t values[2]; 00066 00067 mask = XCB_CW_OVERRIDE_REDIRECT; 00068 values[0] = 1; 00069 00070 /* Open a new window, the resizebar. Grab the pointer and move the window around 00071 as the user moves the pointer. */ 00072 xcb_window_t grabwin = create_window(conn, output->rect, XCB_COPY_FROM_PARENT, XCB_COPY_FROM_PARENT, 00073 XCB_WINDOW_CLASS_INPUT_ONLY, XCURSOR_CURSOR_POINTER, true, mask, values); 00074 00075 Rect helprect; 00076 if (orientation == HORIZ) { 00077 helprect.x = event->root_x; 00078 helprect.y = output->rect.y; 00079 helprect.width = 2; 00080 helprect.height = output->rect.height; 00081 new_position = event->root_x; 00082 } else { 00083 helprect.x = output->rect.x; 00084 helprect.y = event->root_y; 00085 helprect.width = output->rect.width; 00086 helprect.height = 2; 00087 new_position = event->root_y; 00088 } 00089 00090 mask = XCB_CW_BACK_PIXEL; 00091 values[0] = config.client.focused.border; 00092 00093 mask |= XCB_CW_OVERRIDE_REDIRECT; 00094 values[1] = 1; 00095 00096 xcb_window_t helpwin = create_window(conn, helprect, XCB_COPY_FROM_PARENT, XCB_COPY_FROM_PARENT, 00097 XCB_WINDOW_CLASS_INPUT_OUTPUT, (orientation == HORIZ ? 00098 XCURSOR_CURSOR_RESIZE_HORIZONTAL : 00099 XCURSOR_CURSOR_RESIZE_VERTICAL), true, mask, values); 00100 00101 xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin); 00102 00103 xcb_flush(conn); 00104 00105 const struct callback_params params = { orientation, output, helpwin, &new_position }; 00106 00107 drag_pointer(NULL, event, grabwin, BORDER_TOP, resize_callback, ¶ms); 00108 00109 xcb_destroy_window(conn, helpwin); 00110 xcb_destroy_window(conn, grabwin); 00111 xcb_flush(conn); 00112 00113 int pixels; 00114 if (orientation == HORIZ) 00115 pixels = (new_position - event->root_x); 00116 else pixels = (new_position - event->root_y); 00117 00118 DLOG("Done, pixels = %d\n", pixels); 00119 00120 // if we got thus far, the containers must have 00121 // percentages associated with them 00122 assert(first->percent > 0.0); 00123 assert(second->percent > 0.0); 00124 00125 // calculate the new percentage for the first container 00126 double new_percent, difference; 00127 double percent = first->percent; 00128 DLOG("percent = %f\n", percent); 00129 int original = (orientation == HORIZ ? first->rect.width : first->rect.height); 00130 DLOG("original = %d\n", original); 00131 new_percent = (original + pixels) * (percent / original); 00132 difference = percent - new_percent; 00133 DLOG("difference = %f\n", difference); 00134 DLOG("new percent = %f\n", new_percent); 00135 first->percent = new_percent; 00136 00137 // calculate the new percentage for the second container 00138 double s_percent = second->percent; 00139 second->percent = s_percent + difference; 00140 DLOG("second->percent = %f\n", second->percent); 00141 00142 // now we must make sure that the sum of the percentages remain 1.0 00143 con_fix_percent(first->parent); 00144 00145 return 0; 00146 }