/* * File : listctrl.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 static void rtgui_listctrl_update_current(struct rtgui_listctrl* ctrl, rt_uint16_t old_item); static void _rtgui_listctrl_constructor(struct rtgui_listctrl *ctrl) { /* set default widget rect and set event handler */ rtgui_widget_set_event_handler(RTGUI_WIDGET(ctrl),rtgui_listctrl_event_handler); RTGUI_WIDGET(ctrl)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE; ctrl->current_item = -1; ctrl->items_count = 0; ctrl->page_items = 0; ctrl->on_item = 0; ctrl->on_item_draw = RT_NULL; RTGUI_WIDGET_BACKGROUND(RTGUI_WIDGET(ctrl)) = white; RTGUI_WIDGET_TEXTALIGN(RTGUI_WIDGET(ctrl)) = RTGUI_ALIGN_CENTER_VERTICAL; } rtgui_type_t *rtgui_listctrl_type_get(void) { static rtgui_type_t *listctrl_type = RT_NULL; if (!listctrl_type) { listctrl_type = rtgui_type_create("listctrl", RTGUI_WIDGET_TYPE, sizeof(rtgui_listctrl_t), RTGUI_CONSTRUCTOR(_rtgui_listctrl_constructor), RT_NULL); } return listctrl_type; } static void _rtgui_listctrl_get_rect(struct rtgui_listctrl* ctrl, rtgui_rect_t* rect) { rtgui_widget_get_rect(RTGUI_WIDGET(ctrl), rect); if (ctrl->items_count > rtgui_rect_height(*rect)/rtgui_theme_get_selected_height()) { rect->x2 = rect->x2 - 8; } } static void _rtgui_listctrl_get_scrollbar_rect(struct rtgui_listctrl* ctrl, rtgui_rect_t* rect) { rtgui_widget_get_rect(RTGUI_WIDGET(ctrl), rect); if (ctrl->items_count > rtgui_rect_height(*rect)/rtgui_theme_get_selected_height()) { rect->x1 = rect->x2 - 8; } else { /* no scrollbar */ rt_memset(rect, 0, sizeof(rtgui_rect_t)); } } static void _rtgui_listctrl_scrollbar_ondraw(struct rtgui_listctrl* ctrl, struct rtgui_dc* dc) { rtgui_rect_t rect; rt_uint32_t height, y1; /* get scrollbar rect */ _rtgui_listctrl_get_scrollbar_rect(ctrl, &rect); rtgui_dc_fill_rect(dc, &rect); height = rtgui_rect_height(rect); height = height / ((ctrl->items_count + (ctrl->page_items - 1))/ctrl->page_items); y1 = (ctrl->current_item / ctrl->page_items) * height; rect.y1 = rect.y1 + y1; rect.y2 = rect.y1 + height; rect.x1 -= 3; rtgui_theme_draw_selected(dc, &rect); } static void _rtgui_listctrl_scrollbar_onmouse(struct rtgui_listctrl* ctrl, struct rtgui_event_mouse* mouse) { rtgui_rect_t rect; rt_uint32_t height, y1; rt_uint16_t old_item; /* get scrollbar rect */ _rtgui_listctrl_get_scrollbar_rect(ctrl, &rect); height = rtgui_rect_height(rect); height = height / ((ctrl->items_count + (ctrl->page_items - 1))/ctrl->page_items); y1 = (ctrl->current_item / ctrl->page_items) * height; rect.y1 = rect.y1 + y1; rect.y2 = rect.y1 + height; rtgui_widget_rect_to_device(RTGUI_WIDGET(ctrl), &rect); old_item = ctrl->current_item; if (mouse->y < rect.y1) { if (ctrl->current_item - ctrl->page_items >= 0) ctrl->current_item -= ctrl->page_items; rtgui_listctrl_update_current(ctrl, old_item); } else if (mouse->y > rect.y2) { if (ctrl->current_item + ctrl->page_items < ctrl->items_count - 1) ctrl->current_item += ctrl->page_items; else ctrl->current_item = ((ctrl->current_item / ctrl->page_items) + 1) * ctrl->page_items; rtgui_listctrl_update_current(ctrl, old_item); } } static void _rtgui_listctrl_ondraw(struct rtgui_listctrl* ctrl) { struct rtgui_rect rect, item_rect; struct rtgui_dc* dc; rt_uint16_t page_index, index; dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(ctrl)); if (dc == RT_NULL) return; _rtgui_listctrl_get_rect(ctrl, &rect); rtgui_dc_fill_rect(dc, &rect); rect.x2 -= 1; rect.y2 -= 1; /* 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 */ page_index = (ctrl->current_item / ctrl->page_items) * ctrl->page_items; for (index = 0; index < ctrl->page_items; index ++) { if (page_index + index >= ctrl->items_count) break; if (page_index + index == ctrl->current_item) { rtgui_theme_draw_selected(dc, &item_rect); } if (ctrl->on_item_draw != RT_NULL) { ctrl->on_item_draw(ctrl, dc, &item_rect, page_index + index); } /* move to next item position */ item_rect.y1 += (rtgui_theme_get_selected_height() + 2); item_rect.y2 += (rtgui_theme_get_selected_height() + 2); } /* draw scrollbar */ _rtgui_listctrl_scrollbar_ondraw(ctrl, dc); rtgui_dc_end_drawing(dc); } void rtgui_listctrl_update_current(struct rtgui_listctrl* ctrl, rt_uint16_t old_item) { struct rtgui_dc* dc; rtgui_rect_t rect, item_rect; if (old_item/ctrl->page_items != ctrl->current_item/ctrl->page_items) { /* it's not a same page, update all */ rtgui_widget_update(RTGUI_WIDGET(ctrl)); return; } dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(ctrl)); if (dc == RT_NULL) return; _rtgui_listctrl_get_rect(ctrl, &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 % ctrl->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); if (ctrl->on_item_draw != RT_NULL) ctrl->on_item_draw(ctrl, dc, &item_rect, old_item); /* 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 += (ctrl->current_item % ctrl->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); if (ctrl->on_item_draw != RT_NULL) ctrl->on_item_draw(ctrl, dc, &item_rect, ctrl->current_item); rtgui_dc_end_drawing(dc); } rt_bool_t rtgui_listctrl_event_handler(struct rtgui_widget* widget, struct rtgui_event* event) { struct rtgui_listctrl* ctrl = RT_NULL; ctrl = RTGUI_LISTCTRL(widget); switch (event->type) { case RTGUI_EVENT_PAINT: _rtgui_listctrl_ondraw(ctrl); return RT_FALSE; case RTGUI_EVENT_RESIZE: { struct rtgui_event_resize* resize; resize = (struct rtgui_event_resize*)event; /* recalculate page items */ ctrl->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; /* get scrollbar rect */ _rtgui_listctrl_get_scrollbar_rect(ctrl, &rect); rtgui_widget_rect_to_device(RTGUI_WIDGET(ctrl), &rect); if (rtgui_rect_contains_point(&rect, emouse->x, emouse->y) == RT_EOK) { _rtgui_listctrl_scrollbar_onmouse(ctrl, emouse); return RT_TRUE; } /* calculate selected item */ /* get physical extent information */ _rtgui_listctrl_get_rect(ctrl, &rect); rtgui_widget_rect_to_device(widget, &rect); if ((rtgui_rect_contains_point(&rect, emouse->x, emouse->y) == RT_EOK) && (ctrl->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(ctrl)); if (dc != RT_NULL) { /* get widget rect */ rtgui_widget_get_rect(RTGUI_WIDGET(ctrl), &rect); /* update focus border */ rect.x2 -= 1; rect.y2 -= 1; rtgui_dc_end_drawing(dc); } } if ((index < ctrl->page_items) && (ctrl->current_item/ctrl->page_items)* ctrl->page_items + index < ctrl->items_count) { rt_uint16_t old_item; old_item = ctrl->current_item; /* set selected item */ ctrl->current_item = (ctrl->current_item/ctrl->page_items) * ctrl->page_items + index; if (emouse->button & RTGUI_MOUSE_BUTTON_DOWN) { /* down event */ rtgui_listctrl_update_current(ctrl, old_item); } else { /* up event */ if (ctrl->on_item != RT_NULL) { ctrl->on_item(RTGUI_WIDGET(ctrl), RT_NULL); } } } } return RT_TRUE; } case RTGUI_EVENT_KBD: { struct rtgui_event_kbd* ekbd = (struct rtgui_event_kbd*)event; if ((ekbd->type == RTGUI_KEYDOWN) && (ctrl->items_count > 0)) { rt_uint16_t old_item; old_item = ctrl->current_item; switch (ekbd->key) { case RTGUIK_LEFT: if (ctrl->current_item - ctrl->page_items >= 0) ctrl->current_item -= ctrl->page_items; rtgui_listctrl_update_current(ctrl, old_item); return RT_FALSE; case RTGUIK_UP: if (ctrl->current_item > 0) ctrl->current_item --; rtgui_listctrl_update_current(ctrl, old_item); return RT_FALSE; case RTGUIK_RIGHT: if (ctrl->current_item + ctrl->page_items < ctrl->items_count - 1) ctrl->current_item += ctrl->page_items; else { if ((((ctrl->current_item/ctrl->page_items) + 1) * ctrl->page_items) < ctrl->items_count - 1) ctrl->current_item = ((ctrl->current_item / ctrl->page_items) + 1) * ctrl->page_items; } rtgui_listctrl_update_current(ctrl, old_item); return RT_FALSE; case RTGUIK_DOWN: if (ctrl->current_item < ctrl->items_count - 1) ctrl->current_item ++; rtgui_listctrl_update_current(ctrl, old_item); return RT_FALSE; case RTGUIK_RETURN: if (ctrl->on_item != RT_NULL) { ctrl->on_item(RTGUI_WIDGET(ctrl), RT_NULL); } return RT_FALSE; default: break; } } } return RT_FALSE; } /* use ctrl event handler */ return rtgui_widget_event_handler(widget, event); } rtgui_listctrl_t* rtgui_listctrl_create(rt_uint32_t items, rt_uint16_t count, rtgui_rect_t *rect, rtgui_onitem_draw_t ondraw) { struct rtgui_listctrl* ctrl = RT_NULL; ctrl = (struct rtgui_listctrl*) rtgui_widget_create(RTGUI_LISTCTRL_TYPE); if (ctrl != RT_NULL) { ctrl->items = items; ctrl->items_count = count; ctrl->on_item_draw = ondraw; ctrl->page_items = rtgui_rect_height(*rect) / (2 + rtgui_theme_get_selected_height()); rtgui_widget_set_rect(RTGUI_WIDGET(ctrl), rect); } return ctrl; } void rtgui_listctrl_destroy(rtgui_listctrl_t* ctrl) { /* destroy ctrl */ rtgui_widget_destroy(RTGUI_WIDGET(ctrl)); } void rtgui_listctrl_set_onitem(rtgui_listctrl_t* ctrl, rtgui_onitem_func_t func) { RT_ASSERT(ctrl != RT_NULL); ctrl->on_item = func; } void rtgui_listctrl_set_items(rtgui_listctrl_t* ctrl, rt_uint32_t items, rt_uint16_t count) { rtgui_rect_t rect; ctrl->items = items; ctrl->items_count = count; ctrl->current_item = 0; rtgui_widget_get_rect(RTGUI_WIDGET(ctrl), &rect); ctrl->page_items = rtgui_rect_height(rect) / (2 + rtgui_theme_get_selected_height()); rtgui_widget_update(RTGUI_WIDGET(ctrl)); } rt_bool_t rtgui_listctrl_get_item_rect(rtgui_listctrl_t* ctrl, rt_uint16_t item, rtgui_rect_t* item_rect) { if (item < ctrl->items_count) { rt_uint16_t index; /* check whether this item in current page */ index = (ctrl->current_item / ctrl->page_items) * ctrl->page_items; if (index > item || index + ctrl->page_items <= item) return RT_FALSE; rtgui_widget_get_extent(RTGUI_WIDGET(ctrl), item_rect); item_rect->y1 -= 2; item_rect->y1 += (item % ctrl->page_items) * (2 + rtgui_theme_get_selected_height()); item_rect->y2 = item_rect->y1 + (2 + rtgui_theme_get_selected_height()); return RT_TRUE; } return RT_FALSE; }