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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-03-22 21:22:59 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-03-22 21:22:59 +0000 |
commit | 4dedf494c242b2c4b52707441eefe2a36fbacf0f (patch) | |
tree | 36728130c995053f18637c019829f492f0c3b3fe /NxWidgets/libnxwidgets/src/clistbox.cxx | |
parent | af2319a52f4b11df952a5a1060c76cc0cdff0b98 (diff) | |
download | nuttx-4dedf494c242b2c4b52707441eefe2a36fbacf0f.tar.gz nuttx-4dedf494c242b2c4b52707441eefe2a36fbacf0f.tar.bz2 nuttx-4dedf494c242b2c4b52707441eefe2a36fbacf0f.zip |
First check-in of NxWidgets
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4505 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'NxWidgets/libnxwidgets/src/clistbox.cxx')
-rw-r--r-- | NxWidgets/libnxwidgets/src/clistbox.cxx | 661 |
1 files changed, 661 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/src/clistbox.cxx b/NxWidgets/libnxwidgets/src/clistbox.cxx new file mode 100644 index 000000000..a8d3db0a6 --- /dev/null +++ b/NxWidgets/libnxwidgets/src/clistbox.cxx @@ -0,0 +1,661 @@ +/**************************************************************************** + * NxWidgets/libnxwidgets/src/clistbox.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 <stdint.h> +#include <stdbool.h> + +#include "cwidgetcontrol.hxx" +#include "clistbox.hxx" +#include "cgraphicsport.hxx" +#include "cnxfont.hxx" +#include "singletons.hxx" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Method Implementations + ****************************************************************************/ + +using namespace NXWidgets; + +/** + * Constructor. + * + * @param pWidgetControl The controlling widget for the display. + * @param x The x coordinate of the widget. + * @param y The y coordinate of the widget. + * @param width The width of the widget. + * @param height The height of the widget. + * @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. + */ + +CListBox::CListBox(CWidgetControl *pWidgetControl, + nxgl_coord_t x, nxgl_coord_t y, + nxgl_coord_t width, nxgl_coord_t height, + CWidgetStyle *style) +: CScrollingPanel(pWidgetControl, x, y, width, height, 0, style) +{ + m_flags.draggable = true; + m_flags.doubleClickable = true; + m_optionPadding = 2; + m_options.addListDataEventHandler(this); + m_lastSelectedIndex = -1; + + // Disallow horizontal scrolling + + setAllowsHorizontalScroll(false); +} + +/** + * Destructor. + */ + +CListBox::~CListBox(void) +{ + m_options.removeListDataEventHandler(this); +} + + +/** + * Add a new option to the widget using default colors. + * + * @param text Text to show in the option. + * @param value The value of the option. + */ + +void CListBox::addOption(const CNxString &text, const uint32_t value) +{ + addOption(text, value, + getShadowEdgeColor(), getBackgroundColor(), + getShadowEdgeColor(), getHighlightColor()); +} + +/** + * Add an option to the widget. + * + * @param option The option to add. + */ + +void CListBox::addOption(CListBoxDataItem *option) +{ + m_options.addItem(option); +} + +/** + * Remove an option from the widget by its index. + * + * @param index The index of the option to remove. + */ + +void CListBox::removeOption(const int index) +{ + m_options.removeItem(index); +} + +/** + * Remove all options from the widget. + */ + +void CListBox::removeAllOptions(void) +{ + m_options.removeAllItems(); +} + +/** + * Add a new option to the widget. + * + * @param text Text to show in the option. + * @param value The value of the option. + * @param normalTextColor Color to draw the text with when not selected. + * @param normalBackColor Color to draw the background with when not selected. + * @param selectedTextColor Color to draw the text with when selected. + * @param selectedBackColor Color to draw the background with when selected. + */ + +void CListBox::addOption(const CNxString &text, const uint32_t value, + const nxwidget_pixel_t normalTextColor, + const nxwidget_pixel_t normalBackColor, + const nxwidget_pixel_t selectedTextColor, + const nxwidget_pixel_t selectedBackColor) +{ + addOption(new CListBoxDataItem(text, value, + normalTextColor, normalBackColor, + selectedTextColor, selectedBackColor)); +} + +/** + * Select an option by its index. + * Redraws the widget and raises a value changed event. + * + * @param index The index of the option to select. + */ + +void CListBox::selectOption(const int index) +{ + setOptionSelected(index, true); +} + +/** + * Select an option by its index. + * Redraws the widget and raises a value changed event. + * + * @param index The index of the option to select. + */ + +void CListBox::deselectOption(const int index) +{ + setOptionSelected(index, false); +} + +/** + * Select all options. Does nothing if the listbox does not allow + * multiple selections. Redraws the widget and raises a value changed + * event. + */ + +void CListBox::selectAllOptions(void) +{ + m_options.selectAllItems(); +} + +/** + * Deselect all options. + * Redraws the widget and raises a value changed event. + */ + +void CListBox::deselectAllOptions(void) +{ + m_options.deselectAllItems(); +} + +/** + * Get the selected index. Returns -1 if nothing is selected. If + * more than one option is selected, the index of the first selected + * option is returned. + * + * @return The selected index. + */ + +const int CListBox::getSelectedIndex(void) const +{ + return m_options.getSelectedIndex(); +} + +/** + * Sets the selected index. Specify -1 to select nothing. Resets any + * other selected options to deselected. Redraws the widget and raises + * a value changed event. + * + * @param index The selected index. + */ + +void CListBox::setSelectedIndex(const int index) +{ + setOptionSelected(index, true); +} + +/** + * Get the selected option. Returns NULL if nothing is selected. + * + * @return The selected option. + */ + +const CListBoxDataItem *CListBox::getSelectedOption(void) const +{ + return (const CListBoxDataItem*)m_options.getSelectedItem(); +} + +/** + * Resize the scrolling canvas to encompass all options. + */ + +void CListBox::resizeCanvas(void) +{ + // Get client area + + CRect rect; + getClientRect(rect); + + int oldCanvasHeight = m_canvasHeight; + + // Resize the canvas + + m_canvasHeight = (m_options.getItemCount() * getOptionHeight()); + + // Ensure canvas is at least as tall as the widget + + m_canvasHeight = m_canvasHeight < rect.getHeight() ? rect.getHeight() : m_canvasHeight; + + // If resize has left scroll position beyond end of canvas, adjust + // to compensate + + if (m_canvasY + (m_canvasHeight - getHeight()) < 0) + { + scroll(0, -(oldCanvasHeight - (m_canvasHeight - getHeight()))); + } +} + +/** + * Sort the options alphabetically by the text of the options. + */ + +void CListBox::sort(void) +{ + m_options.sort(); +} + +/** + * Get the height of a single option. + * + * @return The height of an option. + */ + +const nxgl_coord_t CListBox::getOptionHeight(void) const +{ + return getFont()->getHeight() + (m_optionPadding << 1); +} + +/** + * Handles list data changed events. + * + * @param e Event arguments. + */ + +void CListBox::handleListDataChangedEvent(const CListDataEventArgs &e) +{ + // Forget the last selected item as it may have changed + + m_lastSelectedIndex = -1; + resizeCanvas(); + redraw(); +} + +/** + * Handles list selection changed events. + * + * @param e Event arguments. + */ + +void CListBox::handleListDataSelectionChangedEvent(const CListDataEventArgs &e) +{ + redraw(); + m_widgetEventHandlers->raiseValueChangeEvent(); +} + +/** + * 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. Value is based on the length of the largest string in the + * set of options. + * + * @param rect Reference to a rect to populate with data. + */ + +void CListBox::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; + } + + nxgl_coord_t maxWidth = 0; + nxgl_coord_t optionWidth = 0; + + // Locate longest string in options + + for (int i = 0; i < m_options.getItemCount(); ++i) + { + optionWidth = getFont()->getStringWidth(m_options.getItem(i)->getText()); + + if (optionWidth > maxWidth) + { + maxWidth = optionWidth; + } + } + + rect.setX(m_rect.getX()); + rect.setY(m_rect.getY()); + rect.setWidth(width + (m_optionPadding << 1) + maxWidth); + rect.setHeight(height + getOptionHeight() * 3); +} + +/** + * Check if the click is a double-click. + * + * @param x X coordinate of the click. + * @param y Y coordinate of the click. + * @return True if the click is a double-click. + */ + +bool CListBox::isDoubleClick(nxgl_coord_t x, nxgl_coord_t y) +{ + if (CNxWidget::isDoubleClick(x, y)) + { + // Calculate which option was clicked + + int selectedIndex = (-m_canvasY + (y - getY())) / getOptionHeight(); + + // Has the same option been clicked twice? Ignore double-clicks that + // occur on different items + + if (selectedIndex == m_lastSelectedIndex) + { + // Process click as a double-click + + return true; + } + } + + return false; +} + +/** + * 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 CListBox::drawContents(CGraphicsPort *port) +{ + // Get the drawing region (excluding the borders) + + CRect rect; + getRect(rect); + + // Draw background + + port->drawFilledRect(rect.getX(), rect.getY(), + rect.getWidth(), rect.getHeight(), + getBackgroundColor()); + + // Calculate clipping values + + nxgl_coord_t clipX = rect.getX(); + nxgl_coord_t clipY = rect.getY(); + nxgl_coord_t clipHeight = rect.getHeight(); + + // Precalc values for option draw loop + + nxgl_coord_t optionHeight = getOptionHeight(); + + // Ensure that we subtract 1 from topOption to ensure that the option + // above is drawn if it is partially visible + + int topOption = ((clipY - m_canvasY) / optionHeight) - 1; + + // Ensure that we add 2 to the bottom option to ensure that the option + // below is draw if it is partially visible - subbing 1 from topOption + // means we need to add an additional 1 to compensate + + int bottomOption = topOption + (clipHeight / optionHeight) + 2; + + // Ensure top options is not negative + + if (topOption < 0) + { + topOption = 0; + } + + // Ensure bottom option does not exceed number of options + + if (bottomOption >= m_options.getItemCount()) + { + bottomOption = m_options.getItemCount() - 1; + } + + // Calculate values for loop + + int y = m_canvasY + (topOption * optionHeight); + int i = topOption; + + const CListBoxDataItem *item = (CListBoxDataItem *)NULL; + + // Loop through all options drawing each ones + + while (i <= bottomOption) + { + item = (const CListBoxDataItem*)m_options.getItem(i); + + // Is the option selected? + + if (item->isSelected()) + { + // Draw background + + if (item->getSelectedBackColor() != getBackgroundColor()) + { + port->drawFilledRect(rect.getX(), rect.getY() + y, + rect.getWidth(), optionHeight, + item->getSelectedBackColor()); + } + + // Draw text + + struct nxgl_point_s pos; + pos.x = rect.getX() + m_optionPadding; + pos.y = rect.getY() + y + m_optionPadding; + + if (isEnabled()) + { + port->drawText(&pos, &rect, getFont(), item->getText(), 0, + item->getText().getLength(), + item->getSelectedTextColor()); + } + else + { + port->drawText(&pos, &rect, getFont(), item->getText(), 0, + item->getText().getLength(), + getDisabledTextColor()); + } + } + else + { + // Draw background + + if (item->getNormalBackColor() != getBackgroundColor()) + { + port->drawFilledRect(clipX, y, getWidth(), optionHeight, + item->getNormalBackColor()); + } + + // Draw text + + struct nxgl_point_s pos; + pos.x = rect.getX() + m_optionPadding; + pos.y = rect.getY() + y + m_optionPadding; + + if (isEnabled()) + { + port->drawText(&pos, &rect, getFont(), item->getText(), 0, + item->getText().getLength(), + item->getNormalTextColor()); + } + else + { + port->drawText(&pos, &rect, getFont(), item->getText(), 0, + item->getText().getLength(), + getDisabledTextColor()); + } + } + + i++; + y += optionHeight; + } +} + +/** + * 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 CListBox::drawBorder(CGraphicsPort *port) +{ + // Stop drawing if the widget indicates it should not have an outline + + if (!isBorderless()) + { + port->drawBevelledRect(0, 0, getWidth(), getHeight(), + getShadowEdgeColor(), getShineEdgeColor()); + } +} + +/** + * Determines which item was clicked and selects or deselects it as + * appropriate. Also starts the dragging system. + * + * @param x The x coordinate of the click. + * @param y The y coordinate of the click. + */ + +void CListBox::onClick(nxgl_coord_t x, nxgl_coord_t y) +{ + // Calculate which option was clicked + + m_lastSelectedIndex = (-m_canvasY + (y - getY())) / getOptionHeight(); + + const CListBoxDataItem *item = + (const CListBoxDataItem*)m_options.getItem(m_lastSelectedIndex); + + // Are we setting or unsetting? + + if (item->isSelected()) + { + // Deselecting + + m_options.deselectItem(m_lastSelectedIndex); + } + else + { + // Selecting + + m_options.selectItem(m_lastSelectedIndex); + } + + startDragging(x, y); + redraw(); +} + +/** + * Selects the clicked item and deselects all others. + * + * @param x The x coordinate of the click. + * @param y The y coordinate of the click. + */ + +void CListBox::onDoubleClick(nxgl_coord_t x, nxgl_coord_t y) +{ + // Calculate which option was clicked + + int newSelectedIndex = (-m_canvasY + (y - getY())) / getOptionHeight(); + + // Double-click - select the item exclusively + + deselectAllOptions(); + setSelectedIndex(newSelectedIndex); + m_widgetEventHandlers->raiseActionEvent(); +} + +/** + * Select or deselect an option by its index. Does not deselect any other selected options. + * Set index to -1 to select nothing. + * Redraws the widget and raises a value changed event. + * + * @param index The index of the option to select. + * @param selected True to select the option, false to deselect it. + */ + +void CListBox::setOptionSelected(const int index, bool selected) +{ + m_options.setItemSelected(index, selected); +} |