rt-thread/rtgui/widgets/textbox.c

351 lines
8.1 KiB
C

/*
* File : textbox.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/textbox.h>
#include <rtgui/rtgui_theme.h>
#ifndef _WIN32
#include <ctype.h>
#endif
#define RTGUI_TEXTBOX_LINE_MAX 64
#define RTGUI_TEXTBOX_MARGIN 3
static void rtgui_textbox_onkey(struct rtgui_textbox* box, struct rtgui_event_kbd* event);
static rt_bool_t rtgui_textbox_onfocus(struct rtgui_widget* widget, struct rtgui_event* event);
static rt_bool_t rtgui_textbox_onunfocus(struct rtgui_widget* widget, struct rtgui_event* event);
static void _rtgui_textbox_constructor(rtgui_textbox_t *box)
{
rtgui_rect_t rect = {0, 0, RTGUI_TEXTBOX_DEFAULT_WIDTH, RTGUI_TEXTBOX_DEFAULT_HEIGHT};
rtgui_widget_set_rect(RTGUI_WIDGET(box), &rect);
RTGUI_WIDGET(box)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE;
rtgui_widget_set_event_handler(RTGUI_WIDGET(box), rtgui_textbox_event_handler);
rtgui_widget_set_onfocus(RTGUI_WIDGET(box), rtgui_textbox_onfocus);
rtgui_widget_set_onunfocus(RTGUI_WIDGET(box), rtgui_textbox_onunfocus);
/* set default text align */
RTGUI_WIDGET_TEXTALIGN(RTGUI_WIDGET(box)) = RTGUI_ALIGN_CENTER_VERTICAL;
/* set proper of control */
box->caret_x = box->caret_y = 0;
box->caret = rtgui_caret_create(RTGUI_WIDGET(box));
box->line = box->line_begin = box->position = 0;
box->type = RTGUI_TEXTBOX_SINGLE;
/* allocate default line buffer */
box->text = RT_NULL;
rtgui_font_get_metrics(RTGUI_WIDGET(box)->gc.font, "h", &rect);
box->font_width = rtgui_rect_width(rect);
}
static void _rtgui_textbox_deconstructor(rtgui_textbox_t *box)
{
if (box->text != RT_NULL)
{
rt_free(box->text);
box->text = RT_NULL;
}
if (box->caret != RT_NULL)
{
rtgui_caret_destroy(box->caret);
box->caret = RT_NULL;
}
}
rtgui_type_t *rtgui_textbox_type_get(void)
{
static rtgui_type_t *textbox_type = RT_NULL;
if (!textbox_type)
{
textbox_type = rtgui_type_create("textbox", RTGUI_WIDGET_TYPE,
sizeof(rtgui_textbox_t),
RTGUI_CONSTRUCTOR(_rtgui_textbox_constructor),
RTGUI_DESTRUCTOR(_rtgui_textbox_deconstructor));
}
return textbox_type;
}
static void rtgui_textbox_onmouse(struct rtgui_textbox* box, struct rtgui_event_mouse* event)
{
rt_size_t length;
RT_ASSERT(box != RT_NULL);
RT_ASSERT(event != RT_NULL);
length = rt_strlen((const char*)box->text);
if (event->button & RTGUI_MOUSE_BUTTON_LEFT &&
event->button & RTGUI_MOUSE_BUTTON_DOWN)
{
rt_int32_t x;
/* set caret position */
x = event->x - RTGUI_WIDGET(box)->extent.x1;
if (x < 0)
{
box->position = 0;
}
else if (x > length * box->font_width)
{
box->position = length;
}
else
{
box->position = x / box->font_width;
}
rtgui_caret_set_point(box->caret, RTGUI_TEXTBOX_MARGIN + box->position * box->font_width, 2);
rtgui_caret_set_box(box->caret, 2, rtgui_rect_height(RTGUI_WIDGET(box)->extent) - 4);
/* set widget focus */
rtgui_widget_focus(RTGUI_WIDGET(box));
}
}
static void rtgui_textbox_onkey(struct rtgui_textbox* box, struct rtgui_event_kbd* event)
{
rt_size_t length;
RT_ASSERT(box != RT_NULL);
RT_ASSERT(event != RT_NULL);
if (event->type != RTGUI_KEYDOWN)
return ;
length = rt_strlen((const char*)box->text);
if (event->key == RTGUIK_DELETE)
{
if (box->position == length - 1)
{
box->text[box->position] = '\0';
}
else
{
unsigned char *c;
/* remove character */
for (c = &box->text[box->position]; c[1] != '\0'; c++)
*c = c[1];
*c = '\0';
}
}
else if (event->key == RTGUIK_BACKSPACE)
{
if (box->position == length - 1)
{
box->text[box->position] = '\0';
box->position --;
}
else if (box->position != 0)
{
/* remove current character */
if (box->position != 0)
{
unsigned char *c;
/* remove character */
for (c = &box->text[box->position - 1]; c[1] != '\0'; c++)
*c = c[1];
*c = '\0';
}
box->position --;
}
}
else if (event->key == RTGUIK_LEFT)
{
if (box->position > 0) box->position --;
}
else if (event->key == RTGUIK_RIGHT)
{
if (box->position < length) box->position ++;
}
else if (event->key == RTGUIK_HOME)
{
box->position = 0;
}
else if (event->key == RTGUIK_END)
{
box->position = length;
}
else if (event->key == RTGUIK_RETURN)
{
if (box->on_enter != RT_NULL)
{
box->on_enter(RTGUI_WIDGET(box), RT_NULL);
}
}
else
{
if (isprint(event->key) || isdigit(event->key))
{
/* no buffer on this line */
if (length + 1 > box->line_length) return;
if (box->position < length - 1)
{
unsigned char* c;
for (c = &box->text[length]; c != &box->text[box->position]; c--)
*c = *(c-1);
box->text[length + 1] = '\0';
}
box->text[box->position] = event->key;
box->position ++;
}
}
/* re-draw text box */
rtgui_theme_draw_textbox(box);
rtgui_caret_set_point(box->caret,
RTGUI_TEXTBOX_MARGIN + box->position * box->font_width , 2);
rtgui_caret_set_box(box->caret, 2, rtgui_rect_height(RTGUI_WIDGET(box)->extent) - 4);
}
static rt_bool_t rtgui_textbox_onfocus(struct rtgui_widget* widget, struct rtgui_event* event)
{
struct rtgui_textbox* box = (struct rtgui_textbox*)widget;
/* show caret */
rtgui_caret_show(box->caret, box->caret_x, box->caret_y);
return RT_TRUE;
}
static rt_bool_t rtgui_textbox_onunfocus(struct rtgui_widget* widget, struct rtgui_event* event)
{
struct rtgui_textbox* box = (struct rtgui_textbox*)widget;
/* hide caret */
rtgui_caret_hide(box->caret);
return RT_TRUE;
}
rt_bool_t rtgui_textbox_event_handler(struct rtgui_widget* widget, struct rtgui_event* event)
{
struct rtgui_textbox* box = (struct rtgui_textbox*)widget;
switch (event->type)
{
case RTGUI_EVENT_PAINT:
if (widget->on_draw != RT_NULL) widget->on_draw(widget, event);
else rtgui_theme_draw_textbox(box);
break;
case RTGUI_EVENT_MOUSE_BUTTON:
if (widget->on_mouseclick != RT_NULL) widget->on_mouseclick(widget, event);
else rtgui_textbox_onmouse(box, (struct rtgui_event_mouse*)event);
return RT_TRUE;
case RTGUI_EVENT_KBD:
if (widget->on_key != RT_NULL) widget->on_key(widget, event);
else rtgui_textbox_onkey(box, (struct rtgui_event_kbd*)event);
return RT_TRUE;
}
return RT_FALSE;
}
struct rtgui_textbox* rtgui_textbox_create(const char* text)
{
struct rtgui_textbox* box;
box = (struct rtgui_textbox*) rtgui_widget_create (RTGUI_TEXTBOX_TYPE);
if (box != RT_NULL)
{
rtgui_rect_t rect = {0, 0, RTGUI_TEXTBOX_DEFAULT_WIDTH, RTGUI_TEXTBOX_DEFAULT_HEIGHT};
/* allocate default line buffer */
rtgui_textbox_set_value(box, text);
rtgui_font_get_metrics(RTGUI_WIDGET(box)->gc.font, "h", &rect);
box->font_width = rtgui_rect_width(rect);
}
return box;
}
void rtgui_textbox_destroy(struct rtgui_textbox* box)
{
rtgui_widget_destroy(RTGUI_WIDGET(box));
}
void rtgui_textbox_set_value(struct rtgui_textbox* box, const char* text)
{
if (box->text != RT_NULL)
{
if (box->line_length > rt_strlen(text) + 1)
{
rt_memcpy(box->text, text, rt_strlen(text) + 1);
return;
}
else
{
/* free the old text */
rtgui_free(box->text);
box->text = RT_NULL;
}
}
box->line_length = RTGUI_TEXTBOX_LINE_MAX > rt_strlen(text) + 1 ?
RTGUI_TEXTBOX_LINE_MAX : rt_strlen(text) + 1;
/* allocate line buffer */
box->text = rtgui_malloc(box->line_length);
rt_memset(box->text, 0, box->line_length);
/* copy text */
rt_memcpy(box->text, text, rt_strlen(text) + 1);
/* set current position */
box->position = 0;
}
const char* rtgui_textbox_get_value(struct rtgui_textbox* box)
{
return (const char*)box->text;
}
void rtgui_widget_set_line_length(struct rtgui_textbox* box, rt_size_t length)
{
rt_uint8_t* new_line;
RT_ASSERT(box != RT_NULL);
/* invalid length */
if (length <= 0) return;
new_line = rtgui_malloc(length);
if (length < box->line_length)
{
rt_memcpy(new_line, box->text, length - 1);
new_line[length] = '\0';
}
else
{
rt_memcpy(new_line, (const char*)box->text, rt_strlen((const char*)box->text));
}
/* set line length */
box->line_length = length;
}