123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/*
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* File : label.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2009, 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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* 2009-10-16 Bernard first version
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*/
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#include <rtgui/dc.h>
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#include <rtgui/widgets/label.h>
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#include <rtgui/rtgui_system.h>
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#include <rtgui/rtgui_theme.h>
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static void _rtgui_label_constructor(rtgui_label_t *label)
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{
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RTGUI_WIDGET_TEXTALIGN(label) = RTGUI_ALIGN_LEFT | RTGUI_ALIGN_CENTER_VERTICAL;
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/* init widget and set event handler */
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rtgui_object_set_event_handler(RTGUI_OBJECT(label), rtgui_label_event_handler);
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/* set field */
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label->text = RT_NULL;
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}
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static void _rtgui_label_destructor(rtgui_label_t *label)
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{
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/* release text memory */
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if (label->text)
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rt_free(label->text);
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label->text = RT_NULL;
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}
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DEFINE_CLASS_TYPE(label, "label",
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RTGUI_WIDGET_TYPE,
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_rtgui_label_constructor,
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_rtgui_label_destructor,
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sizeof(struct rtgui_label));
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rt_bool_t rtgui_label_event_handler(struct rtgui_object *object, struct rtgui_event* event)
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{
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struct rtgui_label *label;
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RTGUI_WIDGET_EVENT_HANDLER_PREPARE
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label = RTGUI_LABEL(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_theme_draw_label(label);
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break;
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default:
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return rtgui_widget_event_handler(object, event);
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}
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return RT_FALSE;
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}
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RTM_EXPORT(rtgui_label_event_handler);
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rtgui_label_t* rtgui_label_create(const char* text)
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{
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struct rtgui_label* label;
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label = (struct rtgui_label*) rtgui_widget_create(RTGUI_LABEL_TYPE);
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if (label != RT_NULL)
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{
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rtgui_rect_t rect;
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/* set default rect */
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rtgui_font_get_metrics(rtgui_font_default(), text, &rect);
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rect.x2 += (RTGUI_BORDER_DEFAULT_WIDTH << 1);
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rect.y2 += (RTGUI_BORDER_DEFAULT_WIDTH << 1);
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rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect);
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/* set text */
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label->text = (char*)rt_strdup((const char*)text);
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}
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return label;
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}
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RTM_EXPORT(rtgui_label_create);
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void rtgui_label_destroy(rtgui_label_t* label)
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{
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rtgui_widget_destroy(RTGUI_WIDGET(label));
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}
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RTM_EXPORT(rtgui_label_destroy);
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char* rtgui_label_get_text(rtgui_label_t* label)
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{
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RT_ASSERT(label != RT_NULL);
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return label->text;
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}
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RTM_EXPORT(rtgui_label_get_text);
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void rtgui_label_set_text(rtgui_label_t* label, const char* text)
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{
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RT_ASSERT(label != RT_NULL);
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if (label->text != RT_NULL)
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{
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/* it's a same text string */
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if (rt_strcmp(text, label->text) == 0)
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return;
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/* release old text memory */
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rt_free(label->text);
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}
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if (text != RT_NULL)
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label->text = (char*)rt_strdup((const char*)text);
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else
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label->text = RT_NULL;
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/* update widget */
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rtgui_theme_draw_label(label);
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}
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RTM_EXPORT(rtgui_label_set_text);
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