/**************************************************************************** * NxWidgets/libnxwidgets/include/clabel.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 all 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_CLABEL_HXX #define __INCLUDE_CLABEL_HXX /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include "cnxwidget.hxx" #include "cwidgetstyle.hxx" #include "cnxstring.hxx" /**************************************************************************** * Pre-Processor Definitions ****************************************************************************/ /**************************************************************************** * Implementation Classes ****************************************************************************/ #if defined(__cplusplus) namespace NXWidgets { /** * Forward references */ class CWidgetControl; class CRect; /** * Single-line label widget. Can align text both vertically and * horizontally in different ways. */ class CLabel : public CNxWidget { public: /** * Enum of horizontal alignment options. */ enum TextAlignmentHoriz { TEXT_ALIGNMENT_HORIZ_CENTER = 0, /**< Centre the text */ TEXT_ALIGNMENT_HORIZ_LEFT = 1, /**< Align left */ TEXT_ALIGNMENT_HORIZ_RIGHT = 2 /**< Align right */ }; /** * Enum of vertical alignment options. */ enum TextAlignmentVert { TEXT_ALIGNMENT_VERT_CENTER = 0, /**< Align to centre of textbox */ TEXT_ALIGNMENT_VERT_TOP = 1, /**< Align to top of textbox */ TEXT_ALIGNMENT_VERT_BOTTOM = 2 /**< Align to bottom of textbox */ }; protected: CNxString m_text; /**< Text that the textbox will display */ struct nxgl_point_s m_align; /**< X/Y offset for text alignment */ TextAlignmentHoriz m_hAlignment; /**< Horizontal alignment of the text */ TextAlignmentVert m_vAlignment; /**< Vertical alignment of the text */ bool m_textChange; /**< Redraw is due to a text change */ bool m_highlighted; /**< Label is highlighted */ /** * 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); /** * 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 drawBorder(CGraphicsPort *port); /** * Resize the widget 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); /** * Calculate the vertical position of the string based on the font * * height and the alignment options. */ virtual void calculateTextPositionVertical(void); /** * Calculate the position of the string based on its length and the * alignment options. */ virtual void calculateTextPositionHorizontal(void); /** * Updates the GUI after the text has changed. */ virtual void onTextChange(void); /** * Copy constructor is protected to prevent usage. */ inline CLabel(const CLabel &label) : CNxWidget(label) { }; public: /** * Constructor for a label containing a string. * * @param pWidgetControl The controlling widget 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 style The style that the button should use. If this is not * specified, the button will use the global default widget * style. */ CLabel(CWidgetControl *pWidgetControl, nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width, nxgl_coord_t height, const CNxString &text, CWidgetStyle *style = (CWidgetStyle *)NULL); /** * Destructor. */ virtual inline ~CLabel() { } /** * Set the horizontal alignment of text within the label. * * @param alignment The horizontal position of the text. */ virtual void setTextAlignmentHoriz(TextAlignmentHoriz alignment); /** * Set the vertical alignment of text within the label. * * @param alignment The vertical position of the text. */ virtual void setTextAlignmentVert(TextAlignmentVert alignment); /** * Set the horizontal alignment of text within the label. * * @param alignment The horizontal position of the text. */ inline const TextAlignmentHoriz getTextAlignmentHoriz(void) const { return m_hAlignment; } /** * Set the vertical alignment of text within the label. * * @param alignment The vertical position of the text. */ inline const TextAlignmentVert getTextAlignmentVert(void) const { return m_vAlignment; } /** * Returns the string shown in the label. * * @return The label's text. */ virtual inline const CNxString &getText(void) const { return m_text; } /** * Set the text displayed in the label. * * @param text String to display. */ virtual void setText(const CNxString &text); /** * Append new text to the end of the current text displayed in the * label. * * @param text String to append. */ virtual void appendText(const CNxString &text); /** * 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 int index); /** * Control the highlight state. * * @param highlightOn True(1), the label will be highlighted */ virtual void highlight(bool highlightOn); /** * Return the current highlight state. * * @return True if the label is highlighted */ virtual inline bool isHighlighted(void) const { return m_highlighted; } /** * Insert the dimensions that this widget wants to have into the rect * passed in as a parameter. All coordinates are relative to the * widget's parent. * * @param rect Reference to a rect to populate with data. */ virtual void getPreferredDimensions(CRect &rect) const; /** * Sets the font. * * @param font A pointer to the font to use. * * NOTE: This font is not deleted when the widget is destroyed! */ virtual void setFont(CNxFont *font); /** * Is the redraw due to a text-only change? * * @return True if the redraw was caused by a text change */ virtual inline bool isTextChange(void) const { return m_textChange; } }; } #endif // __cplusplus #endif // __INCLUDE_CLABEL_HXX