rtt-f030/rtgui/widgets/label.c

114 lines
2.5 KiB
C

/*
* File : label.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2009, 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
* 2009-10-16 Bernard first version
*/
#include <rtgui/dc.h>
#include <rtgui/widgets/label.h>
#include <rtgui/rtgui_system.h>
#include <rtgui/rtgui_theme.h>
static void _rtgui_label_constructor(rtgui_label_t *label)
{
/* init widget and set event handler */
rtgui_widget_set_event_handler(RTGUI_WIDGET(label), rtgui_label_event_handler);
/* set field */
label->text = RT_NULL;
}
static void _rtgui_label_destructor(rtgui_label_t *label)
{
/* release text memory */
rt_free(label->text);
label->text = RT_NULL;
}
rtgui_type_t *rtgui_label_type_get(void)
{
static rtgui_type_t *label_type = RT_NULL;
if (!label_type)
{
label_type = rtgui_type_create("label", RTGUI_WIDGET_TYPE,
sizeof(rtgui_label_t),
RTGUI_CONSTRUCTOR(_rtgui_label_constructor),
RTGUI_DESTRUCTOR(_rtgui_label_destructor));
}
return label_type;
}
rt_bool_t rtgui_label_event_handler(struct rtgui_widget* widget, struct rtgui_event* event)
{
struct rtgui_label* label;
RT_ASSERT(widget != RT_NULL);
label = (struct rtgui_label*) widget;
switch (event->type)
{
case RTGUI_EVENT_PAINT:
rtgui_theme_draw_label(label);
break;
}
return RT_FALSE;
}
rtgui_label_t* rtgui_label_create(const unsigned char* text)
{
struct rtgui_label* label;
label = (struct rtgui_label*) rtgui_widget_create(RTGUI_LABEL_TYPE);
if (label != RT_NULL)
{
rtgui_rect_t rect;
/* set default rect */
rtgui_font_get_metrics(rtgui_font_default(), text, &rect);
rect.x2 += (RTGUI_BORDER_DEFAULT_WIDTH << 1);
rect.y2 += (RTGUI_BORDER_DEFAULT_WIDTH << 1);
rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect);
/* set text */
label->text = (unsigned char*)rt_strdup((const char*)text);
}
return label;
}
void rtgui_label_destroy(rtgui_label_t* label)
{
rtgui_widget_destroy(RTGUI_WIDGET(label));
}
unsigned char* rtgui_label_get_text(rtgui_label_t* label)
{
RT_ASSERT(label != RT_NULL);
return label->text;
}
void rtgui_label_set_text(rtgui_label_t* label, const unsigned char* text)
{
RT_ASSERT(label != RT_NULL);
if (label->text != RT_NULL)
{
/* release old text memory */
rt_free(label->text);
}
if (text != RT_NULL) label->text = (unsigned char*)rt_strdup((const char*)text);
else label->text = RT_NULL;
}