/* * File : listbox.c * This file is part of RTGUI in RT-Thread RTOS * COPYRIGHT (C) 2010, RT-Thread Development Team * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rt-thread.org/license/LICENSE * * Change Logs: * Date Author Notes * 2010-01-06 Bernard first version */ #include #include #define LIST_MARGIN 5 static void _rtgui_listbox_constructor(struct rtgui_listbox *box) { /* set default widget rect and set event handler */ rtgui_object_set_event_handler(RTGUI_OBJECT(box), rtgui_listbox_event_handler); RTGUI_WIDGET(box)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE; box->current_item = -1; box->items_count = 0; box->page_items = 1; box->on_item = 0; RTGUI_WIDGET_BACKGROUND(box) = white; RTGUI_WIDGET_TEXTALIGN(box) = RTGUI_ALIGN_CENTER_VERTICAL; } DEFINE_CLASS_TYPE(listbox, "listbox", RTGUI_WIDGET_TYPE, _rtgui_listbox_constructor, RT_NULL, sizeof(struct rtgui_listbox)); void rtgui_listbox_ondraw(struct rtgui_listbox* box) { struct rtgui_dc* dc; rt_uint16_t page_index, index; const struct rtgui_listbox_item* item; struct rtgui_rect rect, item_rect, image_rect; dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(box)); if (dc == RT_NULL) return; rtgui_widget_get_rect(RTGUI_WIDGET(box), &rect); rtgui_dc_fill_rect(dc, &rect); rect.x2 -= 1; rect.y2 -= 1; /* draw focused border */ if (RTGUI_WIDGET_IS_FOCUSED(box)) rtgui_dc_draw_focus_rect(dc, &rect); /* get item base rect */ item_rect = rect; item_rect.x1 += 1; item_rect.x2 -= 1; item_rect.y1 += 2; item_rect.y2 = item_rect.y1 + (2 + rtgui_theme_get_selected_height()); /* get current page */ if (box->current_item == -1) page_index = 0; else page_index = (box->current_item / box->page_items) * box->page_items; for (index = 0; index < box->page_items; index ++) { if (page_index + index >= box->items_count) break; item = &(box->items[page_index + index]); if (page_index + index == box->current_item) { rtgui_theme_draw_selected(dc, &item_rect); } item_rect.x1 += LIST_MARGIN; if (item->image != RT_NULL) { rtgui_image_get_rect(item->image, &image_rect); rtgui_rect_moveto_align(&item_rect, &image_rect, RTGUI_ALIGN_CENTER_VERTICAL); rtgui_image_blit(item->image, dc, &image_rect); item_rect.x1 += item->image->w + 2; } /* draw text */ rtgui_dc_draw_text(dc, item->name, &item_rect); if (item->image != RT_NULL) item_rect.x1 -= (item->image->w + 2); item_rect.x1 -= LIST_MARGIN; /* move to next item position */ item_rect.y1 += (rtgui_theme_get_selected_height() + 2); item_rect.y2 += (rtgui_theme_get_selected_height() + 2); } rtgui_dc_end_drawing(dc); } static void rtgui_listbox_update_current(struct rtgui_listbox* box, rt_int16_t old_item) { struct rtgui_dc* dc; const struct rtgui_listbox_item* item; rtgui_rect_t rect, item_rect, image_rect; if ((old_item == -1) || (old_item/box->page_items != box->current_item/box->page_items)) { /* it's not a same page, update all */ rtgui_widget_update(RTGUI_WIDGET(box)); return; } dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(box)); if (dc == RT_NULL) return; rtgui_widget_get_rect(RTGUI_WIDGET(box), &rect); rect.x2 -= 1; rect.y2 -= 1; item_rect = rect; /* get old item's rect */ item_rect.x1 += 1; item_rect.x2 -= 1; item_rect.y1 += 2; item_rect.y1 += (old_item % box->page_items) * (2 + rtgui_theme_get_selected_height()); item_rect.y2 = item_rect.y1 + (2 + rtgui_theme_get_selected_height()); /* draw old item */ rtgui_dc_fill_rect(dc, &item_rect); item_rect.x1 += LIST_MARGIN; item = &(box->items[old_item]); if (item->image != RT_NULL) { rtgui_image_get_rect(item->image, &image_rect); rtgui_rect_moveto_align(&item_rect, &image_rect, RTGUI_ALIGN_CENTER_VERTICAL); rtgui_image_blit(item->image, dc, &image_rect); item_rect.x1 += item->image->w + 2; } rtgui_dc_draw_text(dc, item->name, &item_rect); /* draw current item */ item_rect = rect; /* get current item's rect */ item_rect.x1 += 1; item_rect.x2 -= 1; item_rect.y1 += 2; item_rect.y1 += (box->current_item % box->page_items) * (2 + rtgui_theme_get_selected_height()); item_rect.y2 = item_rect.y1 + (2 + rtgui_theme_get_selected_height()); /* draw current item */ rtgui_theme_draw_selected(dc, &item_rect); item_rect.x1 += LIST_MARGIN; item = &(box->items[box->current_item]); if (item->image != RT_NULL) { rtgui_image_get_rect(item->image, &image_rect); rtgui_rect_moveto_align(&item_rect, &image_rect, RTGUI_ALIGN_CENTER_VERTICAL); rtgui_image_blit(item->image, dc, &image_rect); item_rect.x1 += (item->image->w + 2); } rtgui_dc_draw_text(dc, item->name, &item_rect); rtgui_dc_end_drawing(dc); } rt_bool_t rtgui_listbox_event_handler(struct rtgui_object* object, struct rtgui_event* event) { struct rtgui_listbox* box; RTGUI_WIDGET_EVENT_HANDLER_PREPARE box = RTGUI_LISTBOX(object); switch (event->type) { case RTGUI_EVENT_PAINT: rtgui_listbox_ondraw(box); return RT_FALSE; case RTGUI_EVENT_RESIZE: { struct rtgui_event_resize* resize; resize = (struct rtgui_event_resize*)event; /* recalculate page items */ box->page_items = resize->h / (2 + rtgui_theme_get_selected_height()); } break; case RTGUI_EVENT_MOUSE_BUTTON: { rtgui_rect_t rect; struct rtgui_event_mouse* emouse; emouse = (struct rtgui_event_mouse*)event; /* calculate selected item */ /* get physical extent information */ rtgui_widget_get_rect(widget, &rect); rtgui_widget_rect_to_device(widget, &rect); if ((rtgui_rect_contains_point(&rect, emouse->x, emouse->y) == RT_EOK) && (box->items_count > 0)) { rt_uint16_t index; index = (emouse->y - rect.y1) / (2 + rtgui_theme_get_selected_height()); /* set focus */ rtgui_widget_focus(widget); { struct rtgui_rect rect; struct rtgui_dc* dc; dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(box)); if (dc != RT_NULL) { /* get widget rect */ rtgui_widget_get_rect(RTGUI_WIDGET(box), &rect); /* update focus border */ rect.x2 -= 1; rect.y2 -= 1; /* draw focused border */ if (RTGUI_WIDGET_IS_FOCUSED(box)) rtgui_dc_draw_focus_rect(dc, &rect); rtgui_dc_end_drawing(dc); } } if ((index < box->items_count) && (index < box->page_items)) { rt_uint16_t old_item; old_item = box->current_item; /* set selected item */ box->current_item = (box->current_item/box->page_items) * box->page_items + index; if (emouse->button & RTGUI_MOUSE_BUTTON_DOWN) { /* down event */ rtgui_listbox_update_current(box, old_item); } else { /* up event */ if (box->on_item != RT_NULL) { box->on_item(RTGUI_OBJECT(box), RT_NULL); } } } } return RT_TRUE; } case RTGUI_EVENT_KBD: { struct rtgui_event_kbd* ekbd = (struct rtgui_event_kbd*)event; if ((ekbd->type == RTGUI_KEYDOWN) && (box->items_count > 0)) { rt_int16_t old_item; if (box->current_item == -1) { /* set a initial item */ if ((box->items_count > 0) && (ekbd->key == RTGUIK_UP || ekbd->key == RTGUIK_DOWN)) { box->current_item = 0; rtgui_listbox_update_current(box, -1); return RT_TRUE; } else return RT_FALSE; } old_item = box->current_item; switch (ekbd->key) { case RTGUIK_LEFT: if (box->current_item - box->page_items >= 0) box->current_item -= box->page_items; rtgui_listbox_update_current(box, old_item); return RT_TRUE; case RTGUIK_UP: if (box->current_item > 0) box->current_item --; rtgui_listbox_update_current(box, old_item); return RT_TRUE; case RTGUIK_RIGHT: if (box->current_item + box->page_items < box->items_count - 1) box->current_item += box->page_items; rtgui_listbox_update_current(box, old_item); return RT_TRUE; case RTGUIK_DOWN: if (box->current_item < box->items_count - 1) box->current_item ++; rtgui_listbox_update_current(box, old_item); return RT_TRUE; case RTGUIK_RETURN: if (box->on_item != RT_NULL) box->on_item(RTGUI_OBJECT(box), RT_NULL); return RT_TRUE; default: break; } } } return RT_FALSE; } /* use box event handler */ return rtgui_widget_event_handler(RTGUI_OBJECT(widget), event); } rtgui_listbox_t* rtgui_listbox_create(const struct rtgui_listbox_item* items, rt_uint16_t count, rtgui_rect_t *rect) { struct rtgui_listbox* box = RT_NULL; box = (struct rtgui_listbox*) rtgui_widget_create(RTGUI_LISTBOX_TYPE); if (box != RT_NULL) { box->items = items; box->items_count = count; box->page_items = rtgui_rect_height(*rect) / (2 + rtgui_theme_get_selected_height()); if (box->page_items == 0) box->page_items = 1; rtgui_widget_set_rect(RTGUI_WIDGET(box), rect); } return box; } void rtgui_listbox_destroy(rtgui_listbox_t* box) { /* destroy box */ rtgui_widget_destroy(RTGUI_WIDGET(box)); } void rtgui_listbox_set_onitem(rtgui_listbox_t* box, rtgui_event_handler_ptr func) { RT_ASSERT(box != RT_NULL); box->on_item = func; } void rtgui_listbox_set_items(rtgui_listbox_t* box, struct rtgui_listbox_item* items, rt_uint16_t count) { rtgui_rect_t rect; box->items = items; box->items_count = count; box->current_item = -1; rtgui_widget_get_rect(RTGUI_WIDGET(box), &rect); box->page_items = rtgui_rect_height(rect) / (2 + rtgui_theme_get_selected_height()); rtgui_widget_update(RTGUI_WIDGET(box)); } void rtgui_listbox_set_current_item(rtgui_listbox_t* box, int index) { RT_ASSERT(box != RT_NULL); if (index != box->current_item) { int old_item; old_item = box->current_item; box->current_item = index; rtgui_listbox_update_current(box, old_item); } }