/***************************************************************************** Copyright (C) 1994,1997 Ivan A. Curtis. All rights reserved. This code must not be re-distributed without these copyright notices intact. ******************************************************************************* ******************************************************************************* Filename: ~icurtis/src/mx/select.c Description: Update History: (most recent first) I. Curtis 9-Apr-97 12:02 -- Updated I. Curtis 22-Mar-94 23:11 -- Created. ******************************************************************************/ #include "basic.h" #include "alert.h" #include "menu.h" #include "select.h" /********************************** * Handle an event for a scroller * **********************************/ int mx_scroll_event(Display *display, int screen, XEvent *event, mx_scroll *scroll, int *done) { static x, y, pick_x, pick_y; static int pick_item, item; int cursor_range, item_range; switch(event->type) { case Expose: if (event->xexpose.window == scroll->window) { XFillRectangle(display, scroll->window, scroll->app->gcd, scroll->cur_x, scroll->cur_y, scroll->cur_w, scroll->cur_h); return True; } break; case ButtonPress: if (event->xbutton.window == scroll->window) { pick_x = event->xbutton.x; pick_y = event->xbutton.y; pick_item = scroll->menu->start_item; if (pick_x >= scroll->cur_x && pick_x <= scroll->cur_x + scroll->cur_w && pick_y >= scroll->cur_y && pick_y <= scroll->cur_y + scroll->cur_h) scroll->inside = 1; return True; } break; case ButtonRelease: if (event->xbutton.window == scroll->window) { scroll->inside = 0; } break; case MotionNotify: if (event->xmotion.window == scroll->window) { if (!scroll->inside) return True; x = event->xbutton.x; y = event->xbutton.y; if (scroll->cur_y + y - pick_y < scroll->app->item_border) y = scroll->app->item_border + pick_y - scroll->cur_y; else if (scroll->cur_y + y - pick_y > scroll->height - scroll->app->item_border - scroll->cur_h) y = scroll->height - scroll->app->item_border - scroll->cur_h + pick_y - scroll->cur_y; if (y != pick_y) { XFillRectangle(display, scroll->window, scroll->app->gcf, scroll->cur_x, scroll->cur_y, scroll->cur_w, scroll->cur_h); scroll->cur_y += y - pick_y; cursor_range = scroll->height - 2 * scroll->app->item_border - scroll->cur_h; item_range = scroll->max_item - scroll->min_item - scroll->menu->max_items + 1; item = scroll->min_item + (item_range * (scroll->cur_y - scroll->app->item_border) + cursor_range / 2) / cursor_range; if (item != pick_item) { scroll->menu->start_item = pick_item = item; XClearArea(display, scroll->menu->window, 0, 0, 0, 0, True); } XFillRectangle(display, scroll->window, scroll->app->gcf, scroll->cur_x, scroll->cur_y, scroll->cur_w, scroll->cur_h); pick_y = y; } return True; } break; default: break; } return False; } /**************************************** * Pop up a selector on the root window * * at position x, y * ****************************************/ int mx_popup_select(Display *display, int screen, mx_panel *panel, int *x, int *y, int max_items) { XEvent event; mx_menu menu; mx_scroll scroll; mx_alert title; int done; if (!panel) return -1; menu.app = panel->app; menu.width = panel->width + 2 * menu.app->item_border; menu.height = menu.app->ascent + menu.app->descent + 2 * menu.app->item_border; menu.start_item = 1; menu.max_items = max_items; menu.n_items = panel->last_item - panel->first_item + 1; menu.item = panel->item + panel->first_item; scroll.app = panel->app; scroll.cur_w = 7; scroll.cur_h = 10; scroll.width = scroll.cur_w + 2 * scroll.app->item_border; scroll.height = menu.height * menu.max_items; scroll.menu = &menu; scroll.min_item = 1; scroll.max_item = menu.n_items - 1; title.app = panel->app; title.width = menu.width + scroll.width + menu.app->win_border; title.height = menu.height; title.start_item = 0; title.max_items = 1; title.item = menu.item; mx_adjust_xy(display, title.width + 2 * menu.app->win_border, (menu.height * (menu.max_items + 1) + 3 * menu.app->win_border), x, y); title.window = mx_transient_window_open(display, screen, menu.app->win_border, *x, *y, title.width, title.height); XSelectInput(display, title.window, ExposureMask | OwnerGrabButtonMask | ButtonPressMask | ButtonReleaseMask | EnterWindowMask | LeaveWindowMask); title.inside = -1; title.momentary = 0; menu.window = mx_transient_window_open(display, screen, menu.app->win_border, *x, *y + menu.height + menu.app->win_border, menu.width, menu.height * menu.max_items); XSelectInput(display, menu.window, ExposureMask | OwnerGrabButtonMask | ButtonPressMask | PointerMotionMask | ButtonReleaseMask | EnterWindowMask | LeaveWindowMask); scroll.window = mx_transient_window_open(display, screen, menu.app->win_border, *x + menu.width + menu.app->win_border, *y + menu.height + menu.app->win_border, scroll.width, scroll.height); XSelectInput(display, scroll.window, ExposureMask | OwnerGrabButtonMask | ButtonPressMask | ButtonMotionMask | ButtonReleaseMask | EnterWindowMask | LeaveWindowMask); done = 0; menu.inside = 0; menu.momentary = 0; menu.cur_y = 0; menu.choice = -1; scroll.inside = 0; scroll.cur_x = scroll.app->item_border; scroll.cur_y = scroll.app->item_border; while (!done) { XNextEvent(display, &event); if (mx_menu_event(display, screen, &event, &menu, &done, x, y)) continue; if (mx_scroll_event(display, screen, &event, &scroll, &done)) continue; if (mx_alert_event(display, screen, &event, &title, &done, x, y)) continue; if (event.type == Expose && menu.app->expose_fun) { if ((*(menu.app->expose_fun))(&event)) continue; } } mx_window_close(display, title.window); mx_window_close(display, menu.window); mx_window_close(display, scroll.window); return menu.choice; }