376 lines
12 KiB
C++
376 lines
12 KiB
C++
/****************************************************************************
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* NxWidgets/libnxwidgets/include/ctextbox.hxx
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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
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* are met:
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*
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
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* me be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 __INCLUDE_CTEXTBOX_HXX
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#define __INCLUDE_CTEXTBOX_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 "clabel.hxx"
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#include "cnxstring.hxx"
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#include "cwidgetstyle.hxx"
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#include "cwidgeteventargs.hxx"
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#include "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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/**
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* Forward references.
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*/
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class CWidgetControl;
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class CNxTimer;
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class CNxString;
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/**
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* Single-line textbox widget. Can align text both vertically and
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* horizontally in different ways. The widget gains this functionality by
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* inheriting from the CLabel class. However, if the amount of text exceeds
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* the dimensions of the widget, the widget will ignore its horizontal
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* alignment settings and switch to left-aligned instead. This ensures that
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* moving the cursor over the text will scroll through it correctly.
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*/
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class CTextBox : public ITextBox, public CLabel, public CWidgetEventHandler
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{
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protected:
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int m_cursorPos; /**< Position of the cursor within the string. */
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uint8_t m_showCursor; /**< Controls 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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* Redraws the widget
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*/
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inline void onBlur(void);
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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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* Moves the cursor without redrawing.
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*
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* @param position New cursor position.
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* @return True if the cursor position changed
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*/
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virtual bool repositionCursor(const int position);
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/**
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* Move the cursor to the specified coordinates. The coordinates
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* are expected to be the result of a click, and therefore in
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* world-space rather than widget-space.
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*/
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void moveCursorToClickLocation(nxgl_coord_t x, nxgl_coord_t y);
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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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* Moves the cursor to the clicked coordinates.
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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 onClick(nxgl_coord_t x, nxgl_coord_t y);
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/**
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* Does nothing.
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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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* 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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* Get the x coordinate of the cursor in pixels relative
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* to the left-hand edge of the client rect.
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*
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* @return The x coordinate of the cursor in pixels.
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*/
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virtual const nxgl_coord_t getCursorXPos(void) const;
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/**
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* Get the width of the cursor in pixels.
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*
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* @return The width of the cursor in pixels.
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*/
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virtual nxgl_coord_t getCursorWidth(void) const;
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/**
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* Calculate the horizontal position of the string based on its length
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* and the alignment options. Alignment options are overridden if the
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* width of the string exceeds the width of the textbox.
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*/
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virtual void calculateTextPositionHorizontal(void);
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/**
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* Copy constructor is protected to prevent usage.
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*/
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inline CTextBox(const CTextBox& textbox) : CLabel(textbox) { };
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public:
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/**
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* Constructor for a textbox containing a string.
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*
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* @param pWidgetControl The controlling widget for the window
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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 style The style that the button should use. If this is not
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* specified, the button will use the global default widget
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* style.
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*/
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CTextBox(CWidgetControl *pWidgetControl, nxgl_coord_t x, nxgl_coord_t y,
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nxgl_coord_t width, nxgl_coord_t height, const CNxString &text,
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CWidgetStyle *style = (CWidgetStyle *)NULL);
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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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* Set the text displayed in the label.
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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 displayed in the
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* label.
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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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* 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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virtual void insertText(const CNxString &text, const unsigned int index);
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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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virtual void insertTextAtCursor(const CNxString &text);
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/**
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* Move the cursor to the text position specified. 0 indicates the
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* start of the string. If position is greater than the length of the
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* string, 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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* Handle a keyboard press 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 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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}
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#endif // __cplusplus
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#endif // __INCLUDE_CTEXTBOX_HXX
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