/**************************************************************************** * NxWidgets/libnxwidgets/include/cscrollingtextbox.hxx * * Copyright (C) 2012 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX, NxWidgets, nor the names of its contributors * me be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * **************************************************************************** * * Portions of this package derive from Woopsi (http://woopsi.org/) and * portions are original efforts. It is difficult to determine at this * point what parts are original efforts and which parts derive from Woopsi. * However, in any event, the work of Antony Dzeryn will be acknowledged * in most NxWidget files. Thanks Antony! * * Copyright (c) 2007-2011, Antony Dzeryn * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the names "Woopsi", "Simian Zombie" nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ #ifndef __INCLUDE_CSCROLLINGTEXTBOX_HXX #define __INCLUDE_CSCROLLINGTEXTBOX_HXX /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include "cmultilinetextbox.hxx" #include "cwidgeteventhandler.hxx" #include "cwidgetstyle.hxx" #include "cnxstring.hxx" #include "iscrollable.hxx" /**************************************************************************** * Pre-Processor Definitions ****************************************************************************/ /**************************************************************************** * Implementation Classes ****************************************************************************/ #if defined(__cplusplus) namespace NXWidgets { class CScrollbarVertical; class CNxFont; /** * Widget containing a CMultiLineTextBox and a vertical scrollbar. Exposed * methods are more or less identical to the methods exposed by the * CMultiLineTextBox to ensure that the two are interchangeable. */ class CScrollingTextBox : public ITextBox, public CNxWidget, public IScrollable, public CWidgetEventHandler { protected: CMultiLineTextBox *m_texbox; /**< Pointer to the textbox */ CScrollbarVertical *m_scrollbar; /**< Pointer to the scrollbar */ uint8_t m_scrollbarWidth; /**< Width of the scrollbar */ /** * Draw the area of this widget that falls within the clipping region. * Called by the redraw() function to draw all visible regions. * * @param port The CGraphicsPort to draw to. * @see redraw() */ virtual void drawContents(CGraphicsPort *port); /** * Resize the textbox to the new dimensions. * * @param width The new width. * @param height The new height. */ virtual void onResize(nxgl_coord_t width, nxgl_coord_t height); /** * Destructor. */ virtual inline ~CScrollingTextBox(void) { } /** * Copy constructor is protected to prevent usage. */ inline CScrollingTextBox(const CScrollingTextBox& scrollingTextBox) : CNxWidget(scrollingTextBox) { } public: /** * Constructor. * * @param pWidgetControl The widget control for the display. * @param x The x coordinate of the text box, relative to its parent. * @param y The y coordinate of the text box, relative to its parent. * @param width The width of the textbox. * @param height The height of the textbox. * @param text Pointer to a string to display in the textbox. * @param flags Standard widget flag options. * @param maxRows The maximum number of rows the textbox can track. Adding * text beyond this number will cause rows at the start of the text to be * forgotten; text is essentially stored as a queue, and adding to the back * of a full queue causes the front items to be popped off. Setting this to * 0 will make the textbox track only the visible rows. * @param style The style that the widget should use. If this is not * specified, the widget will use the values stored in the global * g_defaultWidgetStyle object. The widget will copy the properties of * the style into its own internal style object. */ CScrollingTextBox(CWidgetControl *pWidgetControl, nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width, nxgl_coord_t height, const CNxString &text, uint32_t flags, nxgl_coord_t maxRows = 0, CWidgetStyle *style = (CWidgetStyle *)NULL); /** * Set the horizontal alignment of text within the textbox. * * @param alignment The horizontal position of the text. */ virtual void setTextAlignmentHoriz(CMultiLineTextBox::TextAlignmentHoriz alignment); /** * Set the vertical alignment of text within the textbox. * * @param alignment The vertical position of the text. */ virtual void setTextAlignmentVert(CMultiLineTextBox::TextAlignmentVert alignment); /** * Returns the number of "pages" that the text spans. A page * is defined as the amount of text that can be displayed within * the textbox at one time. * * @return The page count. */ virtual const uint16_t getPageCount(void) const; /** * Returns the current page. * * @return The current page. * @see getPageCount(). */ virtual const uint16_t getCurrentPage(void) const; /** * Returns a pointer to the Text object that contains the * wrapped text used in the textbox. It is used as the * pre-processed data source for the textbox, and should * not be altered. * * @return Pointer to the Text object. */ virtual const CText *getText(void) const; /** * Set the text displayed in the textbox. * * @param text String to display. */ virtual void setText(const CNxString &text); /** * Append new text to the end of the current text * displayed in the textbox. * * @param text String to append. */ virtual void appendText(const CNxString &text); /** * Remove all characters from the string from the start index onwards. * * @param startIndex Index to remove from. */ virtual void removeText(const unsigned int startIndex); /** * Remove specified number of characters from the string from the * start index onwards. * * @param startIndex Index to remove from. * @param count Number of characters to remove. */ virtual void removeText(const unsigned int startIndex, const unsigned int count); /** * Set the font used in the textbox. * * @param font Pointer to the new font. */ virtual void setFont(CNxFont *font); /** * Get the length of the text string. * * @return The length of the text string. */ virtual const unsigned int getTextLength(void) const; /** * Sets the cursor display mode. * * @param cursorMode Determines cursor display mode */ virtual void showCursor(EShowCursor cursorMode); /** * Shows the cursor in default mode (only when the TextBox has focus). */ inline void showCursor(void) { showCursor(SHOW_CURSOR_ONFOCUS); } /** * Hides the cursor. */ inline void hideCursor(void) { showCursor(SHOW_CURSOR_NEVER); } /** * Enables/disables cursor wrapping * * @param wrap True enables cursor wrapping */ virtual void wrapCursor(bool wrap); /** * Move the cursor to the text position specified. 0 indicates the start * of the string. If position is greater than the length of the string, * the cursor is moved to the end of the string. * * @param position The new cursor position. */ virtual void moveCursorToPosition(const int32_t position); /** * Get the cursor position. This is the index within the string that * the cursor is currently positioned over. * * @return position The cursor position. */ virtual const int32_t getCursorPosition(void) const; /** * Insert text at the specified index. * * @param text The text to insert. * @param index Index at which to insert the text. */ virtual void insertText(const CNxString &text, const unsigned int index); /** * Insert text at the current cursor position. * * @param text The text to insert. */ virtual void insertTextAtCursor(const CNxString &text); /** * Handles events raised by its sub-widgets. * * @param e Event arguments. */ virtual void handleValueChangeEvent(const CWidgetEventArgs &e); /** * Handles events raised by its sub-widgets. * * @param e Event arguments. */ virtual void handleScrollEvent(const CWidgetEventArgs &e); /** * Gets the x coordinate of the virtual canvas. * * @return The x coordinate of the virtual canvas. */ virtual const int32_t getCanvasX(void) const; /** * Gets the y coordinate of the virtual canvas. * * @return The y coordinate of the virtual canvas. */ virtual const int32_t getCanvasY(void) const; /** * Gets the width of the virtual canvas. * * @return The width of the virtual canvas. */ virtual const int32_t getCanvasWidth(void) const; /** * Gets the height of the virtual canvas. * * @return The height of the virtual canvas. */ virtual const int32_t getCanvasHeight(void) const; /** * Scroll the panel by the specified amounts. * * @param dx The horizontal distance to scroll. * @param dy The vertical distance to scroll. */ virtual void scroll(int32_t dx, int32_t dy); /** * Reposition the panel's scrolling region to the specified coordinates. * * @param x The new x coordinate of the scrolling region. * @param y The new y coordinate of the scrolling region. */ virtual void jump(int32_t x, int32_t y); /** * Set whether or not horizontal scrolling is allowed. * * @param allow True to allow horizontal scrolling; false to deny it. */ virtual void setAllowsVerticalScroll(bool allow); /** * Set whether or not horizontal scrolling is allowed. * * @param allow True to allow horizontal scrolling; false to deny it. */ virtual void setAllowsHorizontalScroll(bool allow); /** * Sets the width of the virtual canvas. * * @param width The width of the virtual canvas. */ virtual void setCanvasWidth(const int32_t width); /** * Sets the height of the virtual canvas. * * @param height The height of the virtual canvas. */ virtual void setCanvasHeight(const int32_t height); /** * Returns true if vertical scrolling is allowed. * * @return True if vertical scrolling is allowed. */ virtual bool allowsVerticalScroll(void) const; /** * Returns true if horizontal scrolling is allowed. * * @return True if horizontal scrolling is allowed. */ virtual bool allowsHorizontalScroll(void) const; }; } #endif // __cplusplus #endif // __INCLUDE_CSCROLLINGTEXTBOX_HXX