mirror of
https://github.com/juce-framework/JUCE.git
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111 lines
3.3 KiB
C++
111 lines
3.3 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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#if JUCE_MAC
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namespace juce
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{
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JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wundeclared-selector")
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const auto nsViewFrameChangedSelector = @selector (frameChanged:);
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JUCE_END_IGNORE_WARNINGS_GCC_LIKE
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struct NSViewCallbackInterface
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{
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virtual ~NSViewCallbackInterface() = default;
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virtual void frameChanged() = 0;
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};
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//==============================================================================
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struct NSViewFrameChangeCallbackClass : public ObjCClass<NSObject>
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{
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NSViewFrameChangeCallbackClass()
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: ObjCClass ("JUCE_NSViewCallback_")
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{
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addIvar<NSViewCallbackInterface*> ("target");
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addMethod (nsViewFrameChangedSelector, frameChanged);
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registerClass();
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}
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static void setTarget (id self, NSViewCallbackInterface* c)
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{
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object_setInstanceVariable (self, "target", c);
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}
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private:
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static void frameChanged (id self, SEL, NSNotification*)
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{
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if (auto* target = getIvar<NSViewCallbackInterface*> (self, "target"))
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target->frameChanged();
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}
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JUCE_DECLARE_NON_COPYABLE (NSViewFrameChangeCallbackClass)
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};
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//==============================================================================
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class NSViewFrameWatcher : private NSViewCallbackInterface
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{
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public:
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NSViewFrameWatcher (NSView* viewToWatch, std::function<void()> viewResizedIn)
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: viewResized (std::move (viewResizedIn)), callback (makeCallbackForView (viewToWatch))
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{
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}
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~NSViewFrameWatcher() override
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{
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[[NSNotificationCenter defaultCenter] removeObserver: callback];
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[callback release];
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callback = nil;
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}
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JUCE_DECLARE_NON_COPYABLE (NSViewFrameWatcher)
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JUCE_DECLARE_NON_MOVEABLE (NSViewFrameWatcher)
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private:
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id makeCallbackForView (NSView* view)
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{
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static NSViewFrameChangeCallbackClass cls;
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auto* result = [cls.createInstance() init];
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NSViewFrameChangeCallbackClass::setTarget (result, this);
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[[NSNotificationCenter defaultCenter] addObserver: result
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selector: nsViewFrameChangedSelector
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name: NSViewFrameDidChangeNotification
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object: view];
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return result;
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}
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void frameChanged() override { viewResized(); }
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std::function<void()> viewResized;
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id callback;
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};
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} // namespace juce
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#endif
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