C++ (Cpp) TextLayer_Cursor_SetPos Exemples

Exemple #1

TextBox_Cursor_Update( LCUI_Widget *widget )
/* 更新文本框的光标，返回该光标的像素坐标 */
{
	LCUI_Pos pixel_pos;
	LCUI_Widget *cursor;
	LCUI_TextLayer *layer;
	LCUI_TextBox *textbox;
	LCUI_Size size;
	
	textbox = Widget_GetPrivData( widget );
	layer = TextBox_GetTextLayer( widget );
	/* 如果显示了占位符，那么就复位光标的位置 */
	if( textbox->show_placeholder ) {
		TextLayer_Cursor_SetPos( layer, Pos(0,0) );
	}
	cursor = TextBox_GetCursor( widget );
	size.w = 1;
	size.h = TextLayer_CurRow_GetMaxHeight( layer );
	pixel_pos = TextLayer_Cursor_GetPixelPos( layer );
	Widget_Move( cursor, pixel_pos );
	Widget_Resize( cursor, size );
	/* 若当前文本框处于焦点状态，则让光标在更新时显示 */
	if( active_textbox == widget ) {
		Widget_Show( cursor );
	}
	return pixel_pos;
}

Exemple #2

TextLayer_Text_Backspace( LCUI_TextLayer *layer, int n )
/* 删除光标左边处n个字符 */
{
	int i, row_len;
	LCUI_Pos char_pos;
	Text_RowData *row_ptr;
	
	if( layer->read_only ) {
		return -1;
	}
	
	if( n <= 0 ) {
		return -2;
	}
	/* 计算当前光标所在字的位置 */
	char_pos = TextLayer_Cursor_GetPos( layer );
	DEBUG_MSG2( "before: %d,%d\n", char_pos.x, char_pos.y );
	for( i=n; char_pos.y>=0; --char_pos.y ) {
		row_ptr = Queue_Get( &layer->rows_data, char_pos.y );
		row_len = Queue_GetTotal( &row_ptr->string );
		
		if( char_pos.x == -1 ) {
			char_pos.x = row_len;
		}
		for( ; char_pos.x>=0 && i>0; --char_pos.x,--i );
		
		if( i<=0 && char_pos.x >= 0 ) {
			break;
		}
	}
	DEBUG_MSG2( "after: %d,%d\n", char_pos.x, char_pos.y );
	if( i>0 ) {
		n -= i;
	}
	DEBUG_MSG2("start_pos: %d,%d, len: %d\n", char_pos.x, char_pos.y, n);
	/* 开始删除文字 */
	_TextLayer_Text_Delete( layer, char_pos, n );
	/* 删除完后，需要将光标向左移动一个位置 */
	TextLayer_Cursor_SetPos( layer, char_pos );
	return 0;
}

Exemple #3

TextBox_Cursor_Move( LCUI_Widget *widget, LCUI_Pos new_pos )
/* 移动文本框内的光标 */
{
	LCUI_Pos pixel_pos;
	LCUI_Widget *cursor;
	LCUI_TextLayer *layer;
	LCUI_Size size;
	
	layer = TextBox_GetTextLayer( widget );
	cursor = TextBox_GetCursor( widget );
	size.w = 1;
	size.h = TextLayer_CurRow_GetMaxHeight( layer );
	pixel_pos = TextLayer_Cursor_SetPos( layer, new_pos );
	Widget_Move( cursor, pixel_pos );
	Widget_Resize( cursor, size );
	if( active_textbox == widget ) {
		Widget_Show( cursor );
	}
	/* 更新文本显示区域 */
	TextBox_ViewArea_Update( widget );
	return pixel_pos;
}