mirror of
https://github.com/juce-framework/JUCE.git
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727 lines
21 KiB
C++
727 lines
21 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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ComboBox::ComboBox (const String& name)
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: Component (name),
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noChoicesMessage (TRANS ("(no choices)"))
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{
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setRepaintsOnMouseActivity (true);
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lookAndFeelChanged();
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currentId.addListener (this);
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}
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ComboBox::~ComboBox()
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{
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currentId.removeListener (this);
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hidePopup();
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label.reset();
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}
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//==============================================================================
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void ComboBox::setEditableText (const bool isEditable)
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{
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if (label->isEditableOnSingleClick() != isEditable || label->isEditableOnDoubleClick() != isEditable)
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{
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label->setEditable (isEditable, isEditable, false);
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labelEditableState = (isEditable ? labelIsEditable : labelIsNotEditable);
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const auto isLabelEditable = (labelEditableState == labelIsEditable);
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setWantsKeyboardFocus (! isLabelEditable);
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label->setAccessible (isLabelEditable);
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resized();
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}
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}
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bool ComboBox::isTextEditable() const noexcept
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{
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return label->isEditable();
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}
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void ComboBox::setJustificationType (Justification justification)
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{
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label->setJustificationType (justification);
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}
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Justification ComboBox::getJustificationType() const noexcept
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{
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return label->getJustificationType();
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}
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void ComboBox::setTooltip (const String& newTooltip)
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{
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SettableTooltipClient::setTooltip (newTooltip);
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label->setTooltip (newTooltip);
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}
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//==============================================================================
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void ComboBox::addItem (const String& newItemText, int newItemId)
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{
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// you can't add empty strings to the list
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jassert (newItemText.isNotEmpty());
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// IDs must be non-zero, as zero is used to indicate a lack of selection.
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jassert (newItemId != 0);
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// you shouldn't use duplicate item IDs!
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jassert (getItemForId (newItemId) == nullptr);
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if (newItemText.isNotEmpty() && newItemId != 0)
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currentMenu.addItem (newItemId, newItemText, true, false);
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}
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void ComboBox::addItemList (const StringArray& itemsToAdd, int firstItemID)
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{
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for (auto& i : itemsToAdd)
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currentMenu.addItem (firstItemID++, i);
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}
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void ComboBox::addSeparator()
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{
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currentMenu.addSeparator();
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}
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void ComboBox::addSectionHeading (const String& headingName)
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{
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// you can't add empty strings to the list
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jassert (headingName.isNotEmpty());
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if (headingName.isNotEmpty())
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currentMenu.addSectionHeader (headingName);
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}
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void ComboBox::setItemEnabled (int itemId, bool shouldBeEnabled)
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{
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if (auto* item = getItemForId (itemId))
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item->isEnabled = shouldBeEnabled;
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}
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bool ComboBox::isItemEnabled (int itemId) const noexcept
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{
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if (auto* item = getItemForId (itemId))
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return item->isEnabled;
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return false;
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}
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void ComboBox::changeItemText (int itemId, const String& newText)
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{
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if (auto* item = getItemForId (itemId))
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item->text = newText;
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else
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jassertfalse;
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}
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void ComboBox::clear (const NotificationType notification)
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{
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currentMenu.clear();
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if (! label->isEditable())
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setSelectedItemIndex (-1, notification);
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}
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//==============================================================================
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PopupMenu::Item* ComboBox::getItemForId (int itemId) const noexcept
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{
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if (itemId != 0)
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{
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for (PopupMenu::MenuItemIterator iterator (currentMenu, true); iterator.next();)
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{
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auto& item = iterator.getItem();
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if (item.itemID == itemId)
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return &item;
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}
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}
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return nullptr;
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}
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PopupMenu::Item* ComboBox::getItemForIndex (const int index) const noexcept
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{
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int n = 0;
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for (PopupMenu::MenuItemIterator iterator (currentMenu, true); iterator.next();)
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{
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auto& item = iterator.getItem();
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if (item.itemID != 0)
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if (n++ == index)
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return &item;
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}
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return nullptr;
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}
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int ComboBox::getNumItems() const noexcept
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{
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int n = 0;
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for (PopupMenu::MenuItemIterator iterator (currentMenu, true); iterator.next();)
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{
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auto& item = iterator.getItem();
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if (item.itemID != 0)
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n++;
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}
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return n;
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}
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String ComboBox::getItemText (const int index) const
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{
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if (auto* item = getItemForIndex (index))
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return item->text;
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return {};
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}
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int ComboBox::getItemId (const int index) const noexcept
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{
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if (auto* item = getItemForIndex (index))
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return item->itemID;
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return 0;
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}
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int ComboBox::indexOfItemId (const int itemId) const noexcept
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{
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if (itemId != 0)
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{
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int n = 0;
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for (PopupMenu::MenuItemIterator iterator (currentMenu, true); iterator.next();)
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{
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auto& item = iterator.getItem();
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if (item.itemID == itemId)
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return n;
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else if (item.itemID != 0)
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n++;
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}
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}
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return -1;
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}
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//==============================================================================
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int ComboBox::getSelectedItemIndex() const
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{
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auto index = indexOfItemId (currentId.getValue());
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if (getText() != getItemText (index))
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index = -1;
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return index;
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}
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void ComboBox::setSelectedItemIndex (const int index, const NotificationType notification)
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{
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setSelectedId (getItemId (index), notification);
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}
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int ComboBox::getSelectedId() const noexcept
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{
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if (auto* item = getItemForId (currentId.getValue()))
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if (getText() == item->text)
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return item->itemID;
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return 0;
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}
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void ComboBox::setSelectedId (const int newItemId, const NotificationType notification)
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{
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auto* item = getItemForId (newItemId);
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auto newItemText = item != nullptr ? item->text : String();
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if (lastCurrentId != newItemId || label->getText() != newItemText)
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{
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label->setText (newItemText, dontSendNotification);
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lastCurrentId = newItemId;
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currentId = newItemId;
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repaint(); // for the benefit of the 'none selected' text
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sendChange (notification);
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}
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}
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bool ComboBox::selectIfEnabled (const int index)
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{
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if (auto* item = getItemForIndex (index))
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{
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if (item->isEnabled)
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{
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setSelectedItemIndex (index);
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return true;
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}
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}
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return false;
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}
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bool ComboBox::nudgeSelectedItem (int delta)
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{
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for (int i = getSelectedItemIndex() + delta; isPositiveAndBelow (i, getNumItems()); i += delta)
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if (selectIfEnabled (i))
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return true;
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return false;
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}
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void ComboBox::valueChanged (Value&)
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{
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if (lastCurrentId != (int) currentId.getValue())
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setSelectedId (currentId.getValue());
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}
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//==============================================================================
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String ComboBox::getText() const
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{
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return label->getText();
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}
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void ComboBox::setText (const String& newText, const NotificationType notification)
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{
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for (PopupMenu::MenuItemIterator iterator (currentMenu, true); iterator.next();)
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{
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auto& item = iterator.getItem();
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if (item.itemID != 0
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&& item.text == newText)
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{
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setSelectedId (item.itemID, notification);
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return;
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}
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}
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lastCurrentId = 0;
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currentId = 0;
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repaint();
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if (label->getText() != newText)
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{
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label->setText (newText, dontSendNotification);
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sendChange (notification);
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}
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}
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void ComboBox::showEditor()
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{
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jassert (isTextEditable()); // you probably shouldn't do this to a non-editable combo box?
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label->showEditor();
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}
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//==============================================================================
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void ComboBox::setTextWhenNothingSelected (const String& newMessage)
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{
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if (textWhenNothingSelected != newMessage)
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{
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textWhenNothingSelected = newMessage;
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repaint();
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}
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}
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String ComboBox::getTextWhenNothingSelected() const
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{
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return textWhenNothingSelected;
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}
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void ComboBox::setTextWhenNoChoicesAvailable (const String& newMessage)
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{
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noChoicesMessage = newMessage;
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}
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String ComboBox::getTextWhenNoChoicesAvailable() const
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{
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return noChoicesMessage;
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}
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//==============================================================================
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void ComboBox::paint (Graphics& g)
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{
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getLookAndFeel().drawComboBox (g, getWidth(), getHeight(), isButtonDown,
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label->getRight(), 0, getWidth() - label->getRight(), getHeight(),
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*this);
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if (textWhenNothingSelected.isNotEmpty() && label->getText().isEmpty() && ! label->isBeingEdited())
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getLookAndFeel().drawComboBoxTextWhenNothingSelected (g, *this, *label);
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}
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void ComboBox::resized()
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{
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if (getHeight() > 0 && getWidth() > 0)
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getLookAndFeel().positionComboBoxText (*this, *label);
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}
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void ComboBox::enablementChanged()
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{
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if (! isEnabled())
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hidePopup();
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repaint();
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}
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void ComboBox::colourChanged()
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{
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label->setColour (Label::backgroundColourId, Colours::transparentBlack);
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label->setColour (Label::textColourId, findColour (ComboBox::textColourId));
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label->setColour (TextEditor::textColourId, findColour (ComboBox::textColourId));
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label->setColour (TextEditor::backgroundColourId, Colours::transparentBlack);
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label->setColour (TextEditor::highlightColourId, findColour (TextEditor::highlightColourId));
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label->setColour (TextEditor::outlineColourId, Colours::transparentBlack);
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repaint();
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}
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void ComboBox::parentHierarchyChanged()
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{
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lookAndFeelChanged();
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}
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void ComboBox::lookAndFeelChanged()
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{
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{
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std::unique_ptr<Label> newLabel (getLookAndFeel().createComboBoxTextBox (*this));
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jassert (newLabel != nullptr);
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if (label != nullptr)
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{
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newLabel->setEditable (label->isEditable());
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newLabel->setJustificationType (label->getJustificationType());
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newLabel->setTooltip (label->getTooltip());
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newLabel->setText (label->getText(), dontSendNotification);
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}
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std::swap (label, newLabel);
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}
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addAndMakeVisible (label.get());
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EditableState newEditableState = (label->isEditable() ? labelIsEditable : labelIsNotEditable);
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if (newEditableState != labelEditableState)
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{
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labelEditableState = newEditableState;
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setWantsKeyboardFocus (labelEditableState == labelIsNotEditable);
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}
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label->onTextChange = [this] { triggerAsyncUpdate(); };
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label->addMouseListener (this, false);
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label->setAccessible (labelEditableState == labelIsEditable);
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colourChanged();
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resized();
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}
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//==============================================================================
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bool ComboBox::keyPressed (const KeyPress& key)
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{
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if (key == KeyPress::upKey || key == KeyPress::leftKey)
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{
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nudgeSelectedItem (-1);
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return true;
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}
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if (key == KeyPress::downKey || key == KeyPress::rightKey)
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{
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nudgeSelectedItem (1);
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return true;
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}
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if (key == KeyPress::returnKey)
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{
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showPopupIfNotActive();
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return true;
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}
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return false;
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}
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bool ComboBox::keyStateChanged (const bool isKeyDown)
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{
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// only forward key events that aren't used by this component
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return isKeyDown
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&& (KeyPress::isKeyCurrentlyDown (KeyPress::upKey)
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|| KeyPress::isKeyCurrentlyDown (KeyPress::leftKey)
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|| KeyPress::isKeyCurrentlyDown (KeyPress::downKey)
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|| KeyPress::isKeyCurrentlyDown (KeyPress::rightKey));
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}
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//==============================================================================
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void ComboBox::focusGained (FocusChangeType) { repaint(); }
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void ComboBox::focusLost (FocusChangeType) { repaint(); }
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//==============================================================================
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void ComboBox::showPopupIfNotActive()
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{
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if (! menuActive)
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{
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menuActive = true;
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// as this method was triggered by a mouse event, the same mouse event may have
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// exited the modal state of other popups currently on the screen. By calling
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// showPopup asynchronously, we are giving the other popups a chance to properly
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// close themselves
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MessageManager::callAsync ([safePointer = SafePointer<ComboBox> { this }]() mutable { if (safePointer != nullptr) safePointer->showPopup(); });
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repaint();
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}
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}
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void ComboBox::hidePopup()
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{
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if (menuActive)
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{
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menuActive = false;
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PopupMenu::dismissAllActiveMenus();
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repaint();
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}
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}
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static void comboBoxPopupMenuFinishedCallback (int result, ComboBox* combo)
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{
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if (combo != nullptr)
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{
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combo->hidePopup();
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if (result != 0)
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combo->setSelectedId (result);
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if (auto* handler = combo->getAccessibilityHandler())
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handler->grabFocus();
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}
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}
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void ComboBox::showPopup()
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{
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if (! isEnabled())
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return;
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if (! menuActive)
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menuActive = true;
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auto menu = currentMenu;
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if (menu.getNumItems() > 0)
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{
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auto selectedId = getSelectedId();
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for (PopupMenu::MenuItemIterator iterator (menu, true); iterator.next();)
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{
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auto& item = iterator.getItem();
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if (item.itemID != 0)
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item.isTicked = (item.itemID == selectedId);
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}
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}
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else
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{
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menu.addItem (1, noChoicesMessage, false, false);
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}
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auto& lf = getLookAndFeel();
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menu.setLookAndFeel (&lf);
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menu.showMenuAsync (lf.getOptionsForComboBoxPopupMenu (*this, *label),
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ModalCallbackFunction::forComponent (comboBoxPopupMenuFinishedCallback, this));
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}
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//==============================================================================
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void ComboBox::mouseDown (const MouseEvent& e)
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{
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beginDragAutoRepeat (300);
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isButtonDown = isEnabled() && ! e.mods.isPopupMenu();
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if (isButtonDown && (e.eventComponent == this || ! label->isEditable()))
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showPopupIfNotActive();
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}
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void ComboBox::mouseDrag (const MouseEvent& e)
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{
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beginDragAutoRepeat (50);
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if (isButtonDown && e.mouseWasDraggedSinceMouseDown())
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showPopupIfNotActive();
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}
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void ComboBox::mouseUp (const MouseEvent& e2)
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{
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if (isButtonDown)
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{
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isButtonDown = false;
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repaint();
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auto e = e2.getEventRelativeTo (this);
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if (reallyContains (e.getPosition(), true)
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&& (e2.eventComponent == this || ! label->isEditable()))
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{
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showPopupIfNotActive();
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}
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}
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}
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|
void ComboBox::mouseWheelMove (const MouseEvent& e, const MouseWheelDetails& wheel)
|
|
{
|
|
if (! menuActive && scrollWheelEnabled && e.eventComponent == this && ! approximatelyEqual (wheel.deltaY, 0.0f))
|
|
{
|
|
mouseWheelAccumulator += wheel.deltaY * 5.0f;
|
|
|
|
while (mouseWheelAccumulator > 1.0f)
|
|
{
|
|
mouseWheelAccumulator -= 1.0f;
|
|
nudgeSelectedItem (-1);
|
|
}
|
|
|
|
while (mouseWheelAccumulator < -1.0f)
|
|
{
|
|
mouseWheelAccumulator += 1.0f;
|
|
nudgeSelectedItem (1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Component::mouseWheelMove (e, wheel);
|
|
}
|
|
}
|
|
|
|
void ComboBox::setScrollWheelEnabled (bool enabled) noexcept
|
|
{
|
|
scrollWheelEnabled = enabled;
|
|
}
|
|
|
|
//==============================================================================
|
|
void ComboBox::addListener (ComboBox::Listener* l) { listeners.add (l); }
|
|
void ComboBox::removeListener (ComboBox::Listener* l) { listeners.remove (l); }
|
|
|
|
void ComboBox::handleAsyncUpdate()
|
|
{
|
|
Component::BailOutChecker checker (this);
|
|
listeners.callChecked (checker, [this] (Listener& l) { l.comboBoxChanged (this); });
|
|
|
|
if (checker.shouldBailOut())
|
|
return;
|
|
|
|
NullCheckedInvocation::invoke (onChange);
|
|
|
|
if (checker.shouldBailOut())
|
|
return;
|
|
|
|
if (auto* handler = getAccessibilityHandler())
|
|
handler->notifyAccessibilityEvent (AccessibilityEvent::valueChanged);
|
|
}
|
|
|
|
void ComboBox::sendChange (const NotificationType notification)
|
|
{
|
|
if (notification != dontSendNotification)
|
|
triggerAsyncUpdate();
|
|
|
|
if (notification == sendNotificationSync)
|
|
handleUpdateNowIfNeeded();
|
|
}
|
|
|
|
// Old deprecated methods - remove eventually...
|
|
void ComboBox::clear (const bool dontSendChange) { clear (dontSendChange ? dontSendNotification : sendNotification); }
|
|
void ComboBox::setSelectedItemIndex (const int index, const bool dontSendChange) { setSelectedItemIndex (index, dontSendChange ? dontSendNotification : sendNotification); }
|
|
void ComboBox::setSelectedId (const int newItemId, const bool dontSendChange) { setSelectedId (newItemId, dontSendChange ? dontSendNotification : sendNotification); }
|
|
void ComboBox::setText (const String& newText, const bool dontSendChange) { setText (newText, dontSendChange ? dontSendNotification : sendNotification); }
|
|
|
|
//==============================================================================
|
|
class ComboBoxAccessibilityHandler final : public AccessibilityHandler
|
|
{
|
|
public:
|
|
explicit ComboBoxAccessibilityHandler (ComboBox& comboBoxToWrap)
|
|
: AccessibilityHandler (comboBoxToWrap,
|
|
AccessibilityRole::comboBox,
|
|
getAccessibilityActions (comboBoxToWrap),
|
|
{ std::make_unique<ComboBoxValueInterface> (comboBoxToWrap) }),
|
|
comboBox (comboBoxToWrap)
|
|
{
|
|
}
|
|
|
|
AccessibleState getCurrentState() const override
|
|
{
|
|
auto state = AccessibilityHandler::getCurrentState().withExpandable();
|
|
|
|
return comboBox.isPopupActive() ? state.withExpanded() : state.withCollapsed();
|
|
}
|
|
|
|
String getTitle() const override { return comboBox.getTitle(); }
|
|
String getHelp() const override { return comboBox.getTooltip(); }
|
|
|
|
private:
|
|
class ComboBoxValueInterface final : public AccessibilityTextValueInterface
|
|
{
|
|
public:
|
|
explicit ComboBoxValueInterface (ComboBox& comboBoxToWrap)
|
|
: comboBox (comboBoxToWrap)
|
|
{
|
|
}
|
|
|
|
bool isReadOnly() const override { return true; }
|
|
String getCurrentValueAsString() const override { return comboBox.getText(); }
|
|
void setValueAsString (const String&) override {}
|
|
|
|
private:
|
|
ComboBox& comboBox;
|
|
|
|
//==============================================================================
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ComboBoxValueInterface)
|
|
};
|
|
|
|
static AccessibilityActions getAccessibilityActions (ComboBox& comboBox)
|
|
{
|
|
return AccessibilityActions().addAction (AccessibilityActionType::press, [&comboBox] { comboBox.showPopup(); })
|
|
.addAction (AccessibilityActionType::showMenu, [&comboBox] { comboBox.showPopup(); });
|
|
}
|
|
|
|
ComboBox& comboBox;
|
|
|
|
//==============================================================================
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ComboBoxAccessibilityHandler)
|
|
};
|
|
|
|
std::unique_ptr<AccessibilityHandler> ComboBox::createAccessibilityHandler()
|
|
{
|
|
return std::make_unique<ComboBoxAccessibilityHandler> (*this);
|
|
}
|
|
|
|
} // namespace juce
|