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Diffstat (limited to 'NxWidgets/libnxwidgets/src/clabel.cxx')
| -rw-r--r-- | NxWidgets/libnxwidgets/src/clabel.cxx | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/src/clabel.cxx b/NxWidgets/libnxwidgets/src/clabel.cxx new file mode 100644 index 000000000..4c7ea3554 --- /dev/null +++ b/NxWidgets/libnxwidgets/src/clabel.cxx @@ -0,0 +1,426 @@ +/**************************************************************************** + * NxWidgets/libnxwidgets/src/clabel.cxx + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <stdint.h> +#include <stdbool.h> + +#include <nuttx/nx/nxglib.h> + +#include "nxconfig.hxx" +#include "clabel.hxx" +#include "cgraphicsport.hxx" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * CLabel Method Implementations + ****************************************************************************/ + +using namespace NXWidgets; + +/** + * 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::CLabel(CWidgetControl *pWidgetControl, + nxgl_coord_t x, nxgl_coord_t y, + nxgl_coord_t width, nxgl_coord_t height, + const CNxString &text, CWidgetStyle *style) + : CNxWidget(pWidgetControl, x, y, width, height, 0, style) +{ + // Default is centered text + + m_hAlignment = TEXT_ALIGNMENT_HORIZ_CENTER; + m_vAlignment = TEXT_ALIGNMENT_VERT_CENTER; + + // The border thickness is 1 pixel + + m_borderSize.top = 1; + m_borderSize.right = 1; + m_borderSize.bottom = 1; + m_borderSize.left = 1; + + m_align.x = 0; + m_align.y = 0; + + m_textChange = false; + m_highlighted = false; + setText(text); + + calculateTextPositionHorizontal(); + calculateTextPositionVertical(); +} + +/** + * Set the horizontal alignment of text within the label. + * + * @param alignment The horizontal position of the text. + */ + +void CLabel::setTextAlignmentHoriz(TextAlignmentHoriz alignment) +{ + m_hAlignment = alignment; + calculateTextPositionHorizontal(); + redraw(); +} + +/** + * Set the vertical alignment of text within the label. + * + * @param alignment The vertical position of the text. + */ + +void CLabel::setTextAlignmentVert(TextAlignmentVert alignment) +{ + m_vAlignment = alignment; + calculateTextPositionVertical(); + redraw(); +} + +/** + * Set the text displayed in the label. + * + * @param text String to display. + */ + +void CLabel::setText(const CNxString &text) +{ + m_text = text; + onTextChange(); +} + +/** + * Append new text to the end of the current text displayed in the + * label. + * + * @param text String to append. + */ + +void CLabel::appendText(const CNxString &text) +{ + m_text.append(text); + onTextChange(); +} + +/** + * Insert text at the specified index. + * + * @param text The text to insert. + * @param index Index at which to insert the text. + */ + +void CLabel::insertText(const CNxString &text, const int index) +{ + m_text.insert(text, index); + onTextChange(); +} + +/** + * Control the highlight state. + * + * @param highlightOn True(1), the label will be highlighted + */ + +void CLabel::highlight(bool highlightOn) +{ + if (highlightOn != m_highlighted) + { + m_highlighted = highlightOn; + redraw(); + } +} + +/** + * 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. + */ + +void CLabel::getPreferredDimensions(CRect &rect) const +{ + nxgl_coord_t width; + nxgl_coord_t height; + + if (!m_flags.borderless) + { + width = m_borderSize.left + m_borderSize.right; + height = m_borderSize.top + m_borderSize.bottom; + } + else + { + width = 0; + height = 0; + } + + width += getFont()->getStringWidth(m_text); + height += getFont()->getHeight(); + + rect.setX(m_rect.getX()); + rect.setY(m_rect.getY()); + rect.setWidth(width); + rect.setHeight(height); +} + +/** + * Sets the font. + * + * @param font A pointer to the font to use. + */ + +void CLabel::setFont(CNxFont *font) +{ + m_style.font = font; + + // Need to recalculate the text position as the font may have changed size + + calculateTextPositionHorizontal(); + calculateTextPositionVertical(); + redraw(); +} + +/** + * 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() + */ + +void CLabel::drawContents(CGraphicsPort *port) +{ + // Get the drawing area (excluding the border) + + CRect rect; + getRect(rect); + + // Pick the text and background colors + + nxgl_mxpixel_t textColor; + nxgl_mxpixel_t backColor; + + if (!isEnabled()) + { + textColor = getDisabledTextColor(); + backColor = getBackgroundColor(); + } + else if (m_highlighted) + { + textColor = getSelectedTextColor(); + backColor = getSelectedBackgroundColor(); + } + else + { + textColor = getEnabledTextColor(); + backColor = getBackgroundColor(); + } + + // Draw the background (excluding the border) + + port->drawFilledRect(rect.getX(), rect.getY(), + rect.getWidth(), rect.getHeight(), backColor); + + // Get the X/Y position of the text within the Label + + struct nxgl_point_s pos; + pos.x = rect.getX() + m_align.x; + pos.y = rect.getY() + m_align.y; + + // Add the text using the selected color + + port->drawText(&pos, &rect, getFont(), m_text, 0, m_text.getLength(), + textColor); +} + +/** + * 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() + */ + +void CLabel::drawBorder(CGraphicsPort *port) +{ + // Check if the widget indicates it should have an outline: That + // the outline is enabled and the this is not just a text-only + // redraw + + if (!isBorderless() && !isTextChange()) + { + port->drawBevelledRect(getX(), getY(), getWidth(), getHeight(), + getShadowEdgeColor(), getShineEdgeColor()); + } +} + +/** + * Resize the widget to the new dimensions. + * + * @param width The new width. + * @param height The new height. + */ + +void CLabel::onResize(nxgl_coord_t width, nxgl_coord_t height) +{ + calculateTextPositionHorizontal(); + calculateTextPositionVertical(); +} + +/** + * Calculate the vertical position of the string based on the font + * + * height and the alignment options. + */ + +void CLabel::calculateTextPositionVertical(void) +{ + CRect rect; + getClientRect(rect); + + nxgl_coord_t height = rect.getHeight(); + + switch (m_vAlignment) + { + case TEXT_ALIGNMENT_VERT_CENTER: + m_align.y = (height - getFont()->getHeight()) >> 1; + break; + + case TEXT_ALIGNMENT_VERT_TOP: + m_align.y = 0; + break; + + case TEXT_ALIGNMENT_VERT_BOTTOM: + m_align.y = height - getFont()->getHeight(); + break; + } +} + +/** + * Calculate the position of the string based on its length and the + * alignment options. + */ + +void CLabel::calculateTextPositionHorizontal(void) +{ + CRect rect; + getClientRect(rect); + + nxgl_coord_t width = rect.getWidth(); + + switch (m_hAlignment) + { + case TEXT_ALIGNMENT_HORIZ_CENTER: + m_align.x = (width - getFont()->getStringWidth(m_text)) >> 1; + break; + + case TEXT_ALIGNMENT_HORIZ_LEFT: + m_align.x = 0; + break; + + case TEXT_ALIGNMENT_HORIZ_RIGHT: + m_align.x = width - getFont()->getStringWidth(m_text); + break; + } +} + +/** + * Updates the GUI after the text has changed. + */ + +void CLabel::onTextChange(void) +{ + calculateTextPositionHorizontal(); + calculateTextPositionVertical(); + m_textChange = true; + redraw(); + m_textChange = false; + m_widgetEventHandlers->raiseValueChangeEvent(); +} + + |