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