mirror of
https://github.com/juce-framework/JUCE.git
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cff722a4af
- Created a new detail namespace - Moved shared module implementation details into the detail namespace - Split dependencies so source files only rely on details in the detail namespace - Removed all code from the juce_gui_basics.cpp file
117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2022 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 7 End-User License
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Agreement and JUCE Privacy Policy.
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End User License Agreement: www.juce.com/juce-7-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce::detail
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{
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struct FocusHelpers
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{
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FocusHelpers() = delete;
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static int getOrder (const Component* c)
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{
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auto order = c->getExplicitFocusOrder();
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return order > 0 ? order : std::numeric_limits<int>::max();
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}
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template <typename FocusContainerFn>
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static void findAllComponents (Component* parent,
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std::vector<Component*>& components,
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FocusContainerFn isFocusContainer)
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{
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if (parent == nullptr || parent->getNumChildComponents() == 0)
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return;
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std::vector<Component*> localComponents;
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for (auto* c : parent->getChildren())
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if (c->isVisible() && c->isEnabled())
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localComponents.push_back (c);
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const auto compareComponents = [&] (const Component* a, const Component* b)
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{
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const auto getComponentOrderAttributes = [] (const Component* c)
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{
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return std::make_tuple (getOrder (c),
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c->isAlwaysOnTop() ? 0 : 1,
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c->getY(),
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c->getX());
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};
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return getComponentOrderAttributes (a) < getComponentOrderAttributes (b);
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};
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// This will sort so that they are ordered in terms of explicit focus,
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// always on top, left-to-right, and then top-to-bottom.
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std::stable_sort (localComponents.begin(), localComponents.end(), compareComponents);
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for (auto* c : localComponents)
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{
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components.push_back (c);
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if (! (c->*isFocusContainer)())
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findAllComponents (c, components, isFocusContainer);
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}
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}
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enum class NavigationDirection { forwards, backwards };
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template <typename FocusContainerFn>
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static Component* navigateFocus (Component* current,
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Component* focusContainer,
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NavigationDirection direction,
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FocusContainerFn isFocusContainer)
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{
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if (focusContainer != nullptr)
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{
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std::vector<Component*> components;
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findAllComponents (focusContainer, components, isFocusContainer);
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const auto iter = std::find (components.cbegin(), components.cend(), current);
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if (iter == components.cend())
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return nullptr;
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switch (direction)
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{
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case NavigationDirection::forwards:
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if (iter != std::prev (components.cend()))
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return *std::next (iter);
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break;
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case NavigationDirection::backwards:
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if (iter != components.cbegin())
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return *std::prev (iter);
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break;
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}
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}
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return nullptr;
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}
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};
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} // namespace juce::detail
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