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rt-thread-official/components/rtgui/widgets/listctrl.c

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/*
* 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 <rtgui/rtgui_theme.h>
#include <rtgui/widgets/listctrl.h>
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;
}
DEFINE_CLASS_TYPE(listctrl, "listctrl",
RTGUI_WIDGET_TYPE,
_rtgui_listctrl_constructor,
RT_NULL,
sizeof(struct rtgui_listctrl));
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;
}
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