add listbox widget.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@694 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2010-05-05 14:26:53 +00:00
parent 157bc5f263
commit 13c797f616
2 changed files with 402 additions and 0 deletions

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/*
* File : listbox.h
* 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
*/
#ifndef __RTGUI_LISTBOX_H__
#define __RTGUI_LISTBOX_H__
#include <rtgui/rtgui.h>
#include <rtgui/image.h>
#include <rtgui/rtgui_system.h>
#include <rtgui/widgets/widget.h>
struct rtgui_listbox_item
{
char* name;
rtgui_image_t *image;
};
/** Gets the type of a list box */
#define RTGUI_LISTBOX_TYPE (rtgui_listbox_type_get())
/** Casts the object to a filelist */
#define RTGUI_LISTBOX(obj) (RTGUI_OBJECT_CAST((obj), RTGUI_LISTBOX_TYPE, rtgui_listbox_t))
/** Checks if the object is a filelist box */
#define RTGUI_IS_LISTBOX(obj) (RTGUI_OBJECT_CHECK_TYPE((obj), RTGUI_LISTBOX_TYPE))
struct rtgui_listbox
{
struct rtgui_widget parent;
/* widget private data */
/* listbox item */
const struct rtgui_listbox_item* items;
/* item event handler */
void (*on_item)(rtgui_widget_t *widgets, struct rtgui_event* event);
/* total number of items */
rt_uint16_t items_count;
/* the number of item in a page */
rt_uint16_t page_items;
/* current item */
rt_uint16_t current_item;
};
typedef struct rtgui_listbox rtgui_listbox_t;
typedef void (*rtgui_onitem_func_t)(struct rtgui_widget* widget, rtgui_event_t *event);
rtgui_type_t *rtgui_listbox_type_get(void);
rtgui_listbox_t* rtgui_listbox_create(const struct rtgui_listbox_item* items, rt_uint16_t count,
rtgui_rect_t *rect);
void rtgui_listbox_destroy(rtgui_listbox_t* box);
rt_bool_t rtgui_listbox_event_handler(struct rtgui_widget* widget, struct rtgui_event* event);
#endif

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/*
* 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 <rtgui/rtgui_theme.h>
#include <rtgui/widgets/listbox.h>
#define LIST_MARGIN 5
static void _rtgui_listbox_constructor(struct rtgui_listbox *box)
{
/* set default widget rect and set event handler */
rtgui_widget_set_event_handler(RTGUI_WIDGET(box),rtgui_listbox_event_handler);
RTGUI_WIDGET(box)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE;
box->current_item = 0;
box->items_count = 0;
box->page_items = 0;
box->on_item = 0;
RTGUI_WIDGET_BACKGROUND(RTGUI_WIDGET(box)) = white;
RTGUI_WIDGET_TEXTALIGN(RTGUI_WIDGET(box)) = RTGUI_ALIGN_CENTER_VERTICAL;
}
rtgui_type_t *rtgui_listbox_type_get(void)
{
static rtgui_type_t *listbox_type = RT_NULL;
if (!listbox_type)
{
listbox_type = rtgui_type_create("listbox", RTGUI_WIDGET_TYPE,
sizeof(rtgui_listbox_t), RTGUI_CONSTRUCTOR(_rtgui_listbox_constructor), RT_NULL);
}
return listbox_type;
}
void rtgui_listbox_ondraw(struct rtgui_listbox* box)
{
struct rtgui_rect rect, item_rect;
struct rtgui_dc* dc;
rt_uint16_t page_index, index;
const struct rtgui_listbox_item* item;
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(RTGUI_WIDGET(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 */
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_blit(item->image, dc, &item_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);
}
void rtgui_listbox_update_current(struct rtgui_listbox* box, rt_uint16_t old_item)
{
struct rtgui_dc* dc;
const struct rtgui_listbox_item* item;
rtgui_rect_t rect, item_rect;
if (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_blit(item->image, dc, &item_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_blit(item->image, dc, &item_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_widget* widget, struct rtgui_event* event)
{
struct rtgui_listbox* box = RT_NULL;
box = RTGUI_LISTBOX(widget);
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)
{
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(RTGUI_WIDGET(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_WIDGET(box), RT_NULL);
}
}
}
}
}
break;
case RTGUI_EVENT_KBD:
{
struct rtgui_event_kbd* ekbd = (struct rtgui_event_kbd*)event;
if (ekbd->type == RTGUI_KEYDOWN)
{
rt_uint16_t old_item;
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_FALSE;
case RTGUIK_UP:
if (box->current_item > 0)
box->current_item --;
rtgui_listbox_update_current(box, old_item);
return RT_FALSE;
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_FALSE;
case RTGUIK_DOWN:
if (box->current_item < box->items_count - 1)
box->current_item ++;
rtgui_listbox_update_current(box, old_item);
return RT_FALSE;
case RTGUIK_RETURN:
if (box->on_item != RT_NULL)
{
box->on_item(RTGUI_WIDGET(box), RT_NULL);
}
return RT_FALSE;
default:
break;
}
}
}
return RT_FALSE;
}
/* use box event handler */
return rtgui_widget_event_handler(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());
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_onitem_func_t func)
{
RT_ASSERT(box != RT_NULL);
box->on_item = func;
}