620 lines
18 KiB
C++
620 lines
18 KiB
C++
/****************************************************************************
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* apps/include/graphics/nxwidgets/cmultilinetextbox.hxx
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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*
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* Portions of this package derive from Woopsi (http://woopsi.org/) and
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* portions are original efforts. It is difficult to determine at this
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* point what parts are original efforts and which parts derive from Woopsi.
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* However, in any event, the work of Antony Dzeryn will be acknowledged
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* in most NxWidget files. Thanks Antony!
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*
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* Copyright (c) 2007-2011, Antony Dzeryn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the names "Woopsi", "Simian Zombie" nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CMULTILINETEXTBOX_HXX
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#define __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CMULTILINETEXTBOX_HXX
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <nuttx/nx/nxglib.h>
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#include <nuttx/nx/nx.h>
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#include "graphics/nxwidgets/cscrollingpanel.hxx"
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#include "graphics/nxwidgets/cwidgetstyle.hxx"
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#include "graphics/nxwidgets/cnxstring.hxx"
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#include "graphics/nxwidgets/ctext.hxx"
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#include "graphics/nxwidgets/cwidgeteventhandler.hxx"
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#include "graphics/nxwidgets/itextbox.hxx"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Implementation Classes
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****************************************************************************/
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#if defined(__cplusplus)
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namespace NXWidgets
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{
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class CNxTimer;
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/**
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* Textbox that offers multiple lines of text. Has scrolling
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* capability and can be dragged using the mouse. The text
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* it contains can be changed or added to. It can remember more
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* rows of text than it can display, and these additional
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* rows can be scrolled through.
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*/
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class CMultiLineTextBox : public ITextBox, public CScrollingPanel,
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public CWidgetEventHandler
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{
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public:
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/**
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* Enum of horizontal alignment options.
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*/
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enum TextAlignmentHoriz
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{
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TEXT_ALIGNMENT_HORIZ_CENTER = 0, /**< Centre the text */
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TEXT_ALIGNMENT_HORIZ_LEFT = 1, /**< Align left */
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TEXT_ALIGNMENT_HORIZ_RIGHT = 2 /**< Align right */
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};
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/**
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* Enum of vertical alignment options.
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*/
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enum TextAlignmentVert
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{
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TEXT_ALIGNMENT_VERT_CENTER = 0, /**< Align to centre of textbox */
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TEXT_ALIGNMENT_VERT_TOP = 1, /**< Align to top of textbox */
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TEXT_ALIGNMENT_VERT_BOTTOM = 2 /**< Align to bottom of textbox */
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};
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protected:
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CText *m_text; /**< CText object that manipulates
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and wraps the raw text string. */
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uint8_t m_visibleRows; /**< Total number of rows that the
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textbox can display at once. */
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nxgl_coord_t m_maxRows; /**< Maximum number of rows that the
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textbox should buffer. */
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int32_t m_topRow; /**< Index of the top row of text
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currently displayed. */
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TextAlignmentHoriz m_hAlignment; /**< Horizontal alignment of the text. */
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TextAlignmentVert m_vAlignment; /**< Vertical alignment of the text. */
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int m_cursorPos; /**< Position of the cursor within
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the string. */
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uint8_t m_showCursor; /**< Cursor visibility. */
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bool m_wrapCursor; /**< True wrap cursor at the ends of the text */
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/**
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* Get the coordinates of the cursor relative to the text.
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*
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* @param x Will be populated with the x coordinate of the cursor.
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* @param y Will be populated with the y coordinate of the cursor.
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*/
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virtual void getCursorCoordinates(nxgl_coord_t& x, nxgl_coord_t& y) const;
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/**
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* Gets the index of the character at the specified x coordinate in the
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* specified row.
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*
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* @param x X coordinate of the character.
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* @param rowIndex Index of the row containing the character.
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* @return The index of the character at the specified coordinate.
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*/
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virtual int getCharIndexAtCoordinate(nxgl_coord_t x, int rowIndex) const;
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/**
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* Get the index of the character at the specified coordinates.
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*
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* @param x X coordinate of the character.
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* @param y Y coordinate of the character.
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* @return The index of the character at the specified coordinates.
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*/
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virtual unsigned int getCharIndexAtCoordinates(nxgl_coord_t x, nxgl_coord_t y) const;
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/**
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* Get the row containing the specified Y coordinate.
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*
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* @param y Y coordinate to locate.
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* @return The index of the row containing the specified Y coordinate.
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*/
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int getRowContainingCoordinate(nxgl_coord_t y) const;
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/**
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* Draw the area of this widget that falls within the clipping region.
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* Called by the redraw() function to draw all visible regions.
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*
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* @param port The CGraphicsPort to draw to.
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* @see redraw()
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*/
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virtual void drawContents(CGraphicsPort *port);
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/**
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* Draw the area of this widget that falls within the clipping region.
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* Called by the redraw() function to draw all visible regions.
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*
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* @param port The CGraphicsPort to draw to.
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* @see redraw()
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*/
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virtual void drawBorder(CGraphicsPort *port);
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/**
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* Move cursor one character to the left.
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*/
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virtual void moveCursorLeft(void);
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/**
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* Move cursor one character to the right.
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*/
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virtual void moveCursorRight(void);
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/**
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* Move cursor one row upwards.
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*/
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virtual void moveCursorUp(void);
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/**
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* Move cursor one row downwards.
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*/
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virtual void moveCursorDown(void);
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/**
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* Ensures that the textbox only contains the maximum allowed
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* number of rows by culling any excess rows from the top of
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* the text.
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*
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* @return True if lines were removed from the text; false if not.
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*/
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virtual bool cullTopLines(void);
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/**
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* Ensures that the canvas height is the height of the widget,
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* if the widget exceeds the size of the text, or the height of
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* the text if the text exceeds the size of the widget.
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*/
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virtual void limitCanvasHeight(void);
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/**
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* Ensures that the canvas cannot scroll beyond its height.
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*/
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virtual void limitCanvasY(void);
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/**
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* Jumps to the cursor coordinates of the text.
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*/
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void jumpToCursor(void);
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/**
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* Jumps to the bottom of the text.
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*/
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void jumpToTextBottom(void);
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/**
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* Resize the textbox to the new dimensions.
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*
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* @param width The new width.
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* @param height The new height.
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*/
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virtual void onResize(nxgl_coord_t width, nxgl_coord_t height);
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/**
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* Starts the dragging system.
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*
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* @param x The x coordinate of the click.
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* @param y The y coordinate of the click.
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*/
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virtual void onClick(nxgl_coord_t x, nxgl_coord_t y);
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/**
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* Opens the keyboard on the bottom display.
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*
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* @param x The x coordinates of the click.
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* @param y The y coordinates of the click.
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*/
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virtual void onDoubleClick(nxgl_coord_t x, nxgl_coord_t y);
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/**
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* Handles physical button presses. Moves the cursor
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* in the direction pressed.
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*
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* @param key The key that was pressed.
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*/
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void processPhysicalKey(nxwidget_char_t key);
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/**
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* Handle a keyboard press event.
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*
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* @param e The event data.
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*/
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void handleKeyPressEvent(const CWidgetEventArgs &e);
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/**
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* Handle a cursor control event. Replaces CWidgetEventHandler method.
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*
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* @param e The event data.
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*/
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void handleCursorControlEvent(const CWidgetEventArgs &e);
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/**
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* Gets the x position of a row of text based on the width of the row and the
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* type of horizontal alignment currently set.
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*
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* @param row The index of the row.
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* @return The x coordinate of the row.
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*/
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nxgl_coord_t getRowX(int row) const;
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/**
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* Gets the y position of the specified row of text based on the type of
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* vertical alignment currently set.
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*
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* @param row The row number to find the y coordinate of.
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* @return The y coordinate of the specified row of text.
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*/
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nxgl_coord_t getRowY(int row) const;
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/**
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* Return true if the cursor is visible
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*/
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virtual bool isCursorVisible(void) const;
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/**
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* Gets the character under the cursor.
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*
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* @return The character under the cursor.
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*/
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nxwidget_char_t getCursorChar(void) const;
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/**
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* Works out the number of visible rows within the textbox.
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*/
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void calculateVisibleRows(void);
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/**
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* Draws text.
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*
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* @param port The CGraphicsPort to draw to.
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*/
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void drawText(CGraphicsPort *port);
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/**
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* Draws the cursor.
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*
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* @param port The CGraphicsPort to draw to.
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*/
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void drawCursor(CGraphicsPort *port);
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/**
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* Draws a single line of text.
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*
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* @param port The CGraphicsPort to draw to.
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* @param row The index of the row to draw.
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*/
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void drawRow(CGraphicsPort *port, int row);
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/**
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* Destructor.
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*/
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inline virtual ~CMultiLineTextBox(void)
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{
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delete m_text;
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m_text = NULL;
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}
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/**
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* Copy constructor is protected to prevent usage.
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*/
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inline CMultiLineTextBox(const CMultiLineTextBox &multiLineTextBox)
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: CScrollingPanel(multiLineTextBox) { }
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public:
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/**
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* Constructor.
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*
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* @param pWidgetControl The widget control for the display.
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* @param x The x coordinate of the text box, relative to its parent.
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* @param y The y coordinate of the text box, relative to its parent.
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* @param width The width of the textbox.
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* @param height The height of the textbox.
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* @param text Pointer to a string to display in the textbox.
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* @param flags Standard widget flag options.
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* @param maxRows The maximum number of rows the textbox can track. Adding
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* text beyond this number will cause rows at the start of the text to be
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* forgotten; text is essentially stored as a queue, and adding to the back
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* of a full queue causes the front items to be popped off. Setting this to
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* 0 will make the textbox track only the visible rows.
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* @param style The style that the widget should use. If this is not
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* specified, the widget will use the values stored in the global
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* g_defaultWidgetStyle object. The widget will copy the properties of
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* the style into its own internal style object.
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*/
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CMultiLineTextBox(CWidgetControl *pWidgetControl,
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nxgl_coord_t x, nxgl_coord_t y,
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nxgl_coord_t width, nxgl_coord_t height,
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const CNxString &text, uint32_t flags,
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nxgl_coord_t maxRows = 0,
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CWidgetStyle *style = NULL);
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/**
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* Set the horizontal alignment of text within the textbox.
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*
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* @param alignment The horizontal position of the text.
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*/
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virtual void setTextAlignmentHoriz(TextAlignmentHoriz alignment);
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/**
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* Set the vertical alignment of text within the textbox.
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*
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* @param alignment The vertical position of the text.
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*/
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virtual void setTextAlignmentVert(TextAlignmentVert alignment);
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/**
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* Returns the number of "pages" that the text spans. A page
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* is defined as the amount of text that can be displayed within
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* the textbox at one time.
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*
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* @return The page count.
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*/
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virtual const int getPageCount(void) const;
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/**
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* Returns the current page.
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*
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* @return The current page.
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* @see getPageCount().
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*/
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virtual const int getCurrentPage(void) const;
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/**
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* Returns a pointer to the CText object that contains the
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* wrapped text used in the textbox. It is used as the
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* pre-processed data source for the textbox, and should
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* not be altered.
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*
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* @return Pointer to the CText object.
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*/
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virtual inline const CText *getText(void) const
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{
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return m_text;
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}
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/**
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* Set the text displayed in the textbox.
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*
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* @param text String to display.
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*/
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virtual void setText(const CNxString &text);
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/**
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* Append new text to the end of the current text
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* displayed in the textbox.
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*
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* @param text String to append.
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*/
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virtual void appendText(const CNxString &text);
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/**
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* Remove all characters from the string from the start index onwards.
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*
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* @param startIndex Index to remove from.
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*/
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virtual void removeText(const unsigned int startIndex);
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/**
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* Remove specified number of characters from the string from the
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* start index onwards.
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*
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* @param startIndex Index to remove from.
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* @param count Number of characters to remove.
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*/
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virtual void removeText(const unsigned int startIndex, const unsigned int count);
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/**
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* Set the font used in the textbox.
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*
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* @param font Pointer to the new font.
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*/
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virtual void setFont(CNxFont *font);
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/**
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* Set the line spacing of the text.
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*
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* @param spacing Extra space (in pixels) to add between lines.
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*/
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virtual inline void setLineSpacing(nxgl_coord_t lineSpacing)
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{
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m_text->setLineSpacing(lineSpacing);
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}
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/**
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* Get the length of the text string.
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*
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* @return The length of the text string.
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*/
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virtual const int getTextLength(void) const;
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/**
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* Sets the cursor display mode.
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*
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* @param cursorMode Determines cursor display mode
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*/
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virtual void showCursor(EShowCursor cursorMode);
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/**
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* Shows the cursor in default mode (only when the TextBox has focus).
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*/
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virtual inline void showCursor(void)
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{
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showCursor(SHOW_CURSOR_ONFOCUS);
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}
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/**
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* Hides the cursor.
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*/
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virtual inline void hideCursor(void)
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{
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showCursor(SHOW_CURSOR_NEVER);
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}
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/**
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* Enables/disables cursor wrapping
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*
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* @param wrap True enables cursor wrapping
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*/
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virtual inline void wrapCursor(bool wrap)
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{
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m_wrapCursor = wrap;
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}
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/**
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* Move the cursor to the text position specified. 0 indicates the start
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* of the string. If position is greater than the length of the string,
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* the cursor is moved to the end of the string.
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*
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* @param position The new cursor position.
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*/
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virtual void moveCursorToPosition(const int position);
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/**
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* Get the cursor position. This is the index within the string that
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* the cursor is currently positioned over.
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*
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* @return position The cursor position.
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*/
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virtual inline const int getCursorPosition(void) const
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{
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return m_cursorPos;
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}
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/**
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* Insert text at the specified index.
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*
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* @param text The text to insert.
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* @param index Index at which to insert the text.
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*/
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|
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virtual void insertText(const CNxString &text,
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|
const unsigned int index);
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|
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/**
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|
* Insert text at the current cursor position.
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|
*
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|
* @param text The text to insert.
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|
*/
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|
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virtual void insertTextAtCursor(const CNxString & ext);
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|
};
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|
}
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|
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#endif // __cplusplus
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|
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#endif // __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CMULTILINETEXTBOX_HXX
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