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