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Diffstat (limited to 'NxWidgets/libnxwidgets/src/clistdata.cxx')
-rw-r--r-- | NxWidgets/libnxwidgets/src/clistdata.cxx | 462 |
1 files changed, 462 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/src/clistdata.cxx b/NxWidgets/libnxwidgets/src/clistdata.cxx new file mode 100644 index 000000000..3b9601fc0 --- /dev/null +++ b/NxWidgets/libnxwidgets/src/clistdata.cxx @@ -0,0 +1,462 @@ +/****************************************************************************
+ * NxWidgets/libnxwidgets/src/clistdata.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 <cstring>
+
+#include "clistdata.hxx"
+#include "ilistdataeventhandler.hxx"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Method Implementations
+ ****************************************************************************/
+
+using namespace NXWidgets;
+
+/**
+ * Constructor.
+ */
+
+CListData::CListData(void)
+{
+ m_allowMultipleSelections = true;
+ m_sortInsertedItems = false;
+}
+
+/**
+ * Destructor.
+ */
+
+CListData::~CListData(void)
+{
+ removeAllItems();
+}
+
+/**
+ * Add a new item.
+ *
+ * @param text Text to show in the option.
+ * @param value The value of the option.
+ */
+
+void CListData::addItem(const CNxString &text, const uint32_t value)
+{
+ // Create new option
+
+ addItem(new CListDataItem(text, value));
+}
+
+/**
+ * Add an existing item. CListData becomes the owner of the option and will delete it
+ * when the list is deleted.
+ *
+ * @param item The item to add.
+ */
+
+void CListData::addItem(CListDataItem *item)
+{
+ // Determine insert type
+
+ if (m_sortInsertedItems)
+ {
+ // Sorted insert
+
+ m_items.insert(getSortedInsertionIndex(item), item);
+ }
+ else
+ {
+ // Append
+
+ m_items.push_back(item);
+ }
+
+ raiseDataChangedEvent();
+}
+
+/**
+ * Remove an item by its index.
+ *
+ * @param index The index of the option to remove.
+ */
+
+void CListData::removeItem(const int index)
+{
+ // Bounds check
+
+ if (index < m_items.size())
+ {
+ // Delete the option
+
+ delete m_items[index];
+
+ // Erase the option from the list
+
+ m_items.erase(index);
+ raiseDataChangedEvent();
+ }
+}
+
+/**
+ * Select an item by its index.
+ *
+ * @param index The index of the item to select.
+ */
+
+void CListData::selectItem(const int index)
+{
+ setItemSelected(index, true);
+}
+
+/**
+ * Deselect an item by its index.
+ *
+ * @param index The index of the item to select.
+ */
+
+void CListData::deselectItem(const int index)
+{
+ setItemSelected(index, false);
+}
+
+/**
+ * Remove all items.
+ */
+
+void CListData::removeAllItems(void)
+{
+ // Delete all option data
+
+ for (int i = 0; i < m_items.size(); i++)
+ {
+ delete m_items[i];
+ }
+
+ m_items.clear();
+ raiseDataChangedEvent();
+}
+
+/**
+ * Get the selected index. Returns -1 if nothing is selected. If more than one
+ * item is selected, the index of the first selected item is returned.
+ *
+ * @return The selected index.
+ */
+
+const int CListData::getSelectedIndex(void) const
+{
+ // Get the first selected index
+
+ for (int i = 0; i < m_items.size(); i++)
+ {
+ if (m_items[i]->isSelected())
+ {
+ return i;
+ }
+ }
+
+ return -1;
+}
+
+/**
+ * Sets the selected index. Specify -1 to select nothing. Resets any
+ * other selected items to deselected.
+ *
+ * @param index The selected index.
+ */
+
+void CListData::setSelectedIndex(const int index)
+{
+ setItemSelected(index, true);
+}
+
+/**
+ * Get the selected item. Returns NULL if nothing is selected.
+ *
+ * @return The selected option.
+ */
+
+const CListDataItem *CListData::getSelectedItem(void) const
+{
+ // Get the first selected option
+
+ int index = getSelectedIndex();
+ if (index > -1)
+ {
+ return m_items[index];
+ }
+ return (CListDataItem *)NULL;
+}
+
+/**
+ * Sort the items using their compareTo() methods.
+ */
+
+void CListData::sort(void)
+{
+ quickSort(0, m_items.size() - 1);
+ raiseDataChangedEvent();
+}
+
+/**
+ * Select all items. Does nothing if the list does not allow
+ * multiple selections.
+ */
+
+void CListData::selectAllItems(void)
+{
+ if (m_allowMultipleSelections)
+ {
+ for (int i = 0; i < m_items.size(); i++)
+ {
+ m_items[i]->setSelected(true);
+ }
+
+ raiseSelectionChangedEvent();
+ }
+}
+
+/**
+ * Deselect all items.
+ */
+
+void CListData::deselectAllItems(void)
+{
+ for (int i = 0; i < m_items.size(); i++)
+ {
+ m_items[i]->setSelected(false);
+ }
+
+ raiseSelectionChangedEvent();
+}
+
+/**
+ * Select or deselect an item by its index. Does not deselect any
+ * other selected items. Set index to -1 to select nothing.
+ *
+ * @param index The index of the item to select.
+ * @param selected True to select the item, false to deselect it.
+ */
+
+void CListData::setItemSelected(const int index, bool selected)
+{
+ // Deselect old options if we're making an option selected and
+ // we're not a multiple list
+
+ if (((!m_allowMultipleSelections) || (index == -1)) && (selected))
+ {
+ for (int i = 0; i < m_items.size(); i++)
+ {
+ m_items[i]->setSelected(false);
+ }
+ }
+
+ // Select or deselect the new option
+
+ if ((index > -1) && (index < m_items.size()))
+ {
+ m_items[index]->setSelected(selected);
+ }
+
+ raiseSelectionChangedEvent();
+}
+
+/**
+ * Remove an event handler.
+ *
+ * @param eventHandler The event handler to remove.
+ */
+
+void CListData::removeListDataEventHandler(IListDataEventHandler *eventHandler)
+{
+ for (int i = 0; i < m_listDataEventhandlers.size(); ++i)
+ {
+ if (m_listDataEventhandlers.at(i) == eventHandler)
+ {
+ m_listDataEventhandlers.erase(i);
+ return;
+ }
+ }
+}
+
+/**
+ * Quick sort the items using their compareTo() methods.
+ *
+ * @param start The index to start sorting at.
+ * @param end The index to stop sorting at.
+ */
+
+void CListData::quickSort(const int start, const int end)
+{
+ if (end > start)
+ {
+ int left = start;
+ int right = end;
+
+ CListDataItem *pivot = m_items[(start + end) >> 1];
+
+ do
+ {
+ while ((pivot->compareTo(m_items[left]) > 0) && (left < end))
+ {
+ left++;
+ }
+
+ while ((pivot->compareTo(m_items[right]) < 0) && (right > start))
+ {
+ right--;
+ }
+
+ if (left > right)
+ {
+ break;
+ }
+
+ swapItems(left, right);
+ left++;
+ right--;
+ }
+ while (left <= right);
+
+ quickSort(start, right);
+ quickSort(left, end);
+ }
+}
+
+/**
+ * Swap the locations of two items in the array.
+ *
+ * @param index1 The index of the first item to swap.
+ * @param index2 The index of the second item to swap.
+ */
+
+void CListData::swapItems(const int index1, const int index2)
+{
+ CListDataItem *tmp = m_items[index1];
+ m_items[index1] = m_items[index2];
+ m_items[index2] = tmp;
+}
+
+/**
+ * Return the index that an item should be inserted at to maintain a sorted list of data.
+ *
+ * @param item The item to insert.
+ * @return The index that the item should be imserted into at.
+ */
+
+const int CListData::getSortedInsertionIndex(const CListDataItem *item) const
+{
+ int i = 0;
+
+ // Locate slot where new option should go
+
+ while ((i < m_items.size()) && (item->compareTo(m_items[i]) > 0))
+ {
+ i++;
+ }
+ return i;
+}
+
+/**
+ * Raise a data changed event.
+ */
+
+void CListData::raiseDataChangedEvent(void)
+{
+ CListDataEventArgs eventArgs(this);
+
+ for (int i = 0; i < m_listDataEventhandlers.size(); ++i)
+ {
+ m_listDataEventhandlers.at(i)->handleListDataChangedEvent(eventArgs);
+ }
+}
+
+/**
+ * Raise a selection changed event.
+ */
+
+void CListData::raiseSelectionChangedEvent(void)
+{
+ CListDataEventArgs eventArgs(this);
+
+ for (int i = 0; i < m_listDataEventhandlers.size(); ++i)
+ {
+ m_listDataEventhandlers.at(i)->handleListDataSelectionChangedEvent(eventArgs);
+ }
+}
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