468 lines
14 KiB
C++
468 lines
14 KiB
C++
/****************************************************************************
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* NxWidgets/libnxwidgets/include/cscrollingtextbox.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_CSCROLLINGTEXTBOX_HXX
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#define __INCLUDE_CSCROLLINGTEXTBOX_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 "cmultilinetextbox.hxx"
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#include "cwidgeteventhandler.hxx"
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#include "cwidgetstyle.hxx"
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#include "cnxstring.hxx"
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#include "iscrollable.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 CScrollbarVertical;
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class CNxFont;
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/**
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* Widget containing a CMultiLineTextBox and a vertical scrollbar. Exposed
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* methods are more or less identical to the methods exposed by the
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* CMultiLineTextBox to ensure that the two are interchangeable.
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*/
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class CScrollingTextBox : public ITextBox, public CNxWidget,
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public IScrollable, public CWidgetEventHandler
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{
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protected:
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CMultiLineTextBox *m_texbox; /**< Pointer to the textbox */
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CScrollbarVertical *m_scrollbar; /**< Pointer to the scrollbar */
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uint8_t m_scrollbarWidth; /**< Width of the scrollbar */
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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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* 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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* Destructor.
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*/
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virtual inline ~CScrollingTextBox(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 CScrollingTextBox(const CScrollingTextBox& scrollingTextBox)
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: CNxWidget(scrollingTextBox) { }
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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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CScrollingTextBox(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 = (CWidgetStyle *)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(CMultiLineTextBox::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(CMultiLineTextBox::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 uint16_t 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 uint16_t getCurrentPage(void) const;
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/**
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* Returns a pointer to the Text 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 Text object.
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*/
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virtual const CText *getText(void) const;
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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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* 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 unsigned 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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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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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 void wrapCursor(bool wrap);
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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 int32_t 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 const int32_t getCursorPosition(void) const;
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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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* Handles events raised by its sub-widgets.
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*
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* @param e Event arguments.
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*/
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virtual void handleValueChangeEvent(const CWidgetEventArgs &e);
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/**
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* Handles events raised by its sub-widgets.
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*
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* @param e Event arguments.
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*/
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virtual void handleScrollEvent(const CWidgetEventArgs &e);
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/**
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* Gets the x coordinate of the virtual canvas.
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*
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* @return The x coordinate of the virtual canvas.
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*/
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virtual const int32_t getCanvasX(void) const;
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/**
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* Gets the y coordinate of the virtual canvas.
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*
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* @return The y coordinate of the virtual canvas.
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*/
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virtual const int32_t getCanvasY(void) const;
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/**
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* Gets the width of the virtual canvas.
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*
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* @return The width of the virtual canvas.
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*/
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virtual const int32_t getCanvasWidth(void) const;
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/**
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* Gets the height of the virtual canvas.
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*
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* @return The height of the virtual canvas.
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*/
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virtual const int32_t getCanvasHeight(void) const;
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/**
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* Scroll the panel by the specified amounts.
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*
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* @param dx The horizontal distance to scroll.
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* @param dy The vertical distance to scroll.
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*/
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virtual void scroll(int32_t dx, int32_t dy);
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/**
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* Reposition the panel's scrolling region to the specified coordinates.
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*
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* @param x The new x coordinate of the scrolling region.
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* @param y The new y coordinate of the scrolling region.
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*/
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virtual void jump(int32_t x, int32_t y);
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/**
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* Set whether or not horizontal scrolling is allowed.
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*
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* @param allow True to allow horizontal scrolling; false to deny it.
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*/
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virtual void setAllowsVerticalScroll(bool allow);
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/**
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* Set whether or not horizontal scrolling is allowed.
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*
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* @param allow True to allow horizontal scrolling; false to deny it.
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*/
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virtual void setAllowsHorizontalScroll(bool allow);
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/**
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* Sets the width of the virtual canvas.
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*
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* @param width The width of the virtual canvas.
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*/
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virtual void setCanvasWidth(const int32_t width);
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/**
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* Sets the height of the virtual canvas.
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*
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* @param height The height of the virtual canvas.
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*/
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virtual void setCanvasHeight(const int32_t height);
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/**
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* Returns true if vertical scrolling is allowed.
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*
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* @return True if vertical scrolling is allowed.
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*/
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virtual bool allowsVerticalScroll(void) const;
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/**
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* Returns true if horizontal scrolling is allowed.
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*
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* @return True if horizontal scrolling is allowed.
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*/
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virtual bool allowsHorizontalScroll(void) const;
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};
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}
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#endif // __cplusplus
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#endif // __INCLUDE_CSCROLLINGTEXTBOX_HXX
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