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Implement wxEVT_SYS_COLOUR_CHANGED in wxOSX (#832)

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Starting with macOS 10.14 Mojave, system colors can change dynamically
when the user switches between light and dark modes. Detect this by
observing the effectiveAppearance property and emit
wxSysColourChangedEvent accordingly.

See #18146.
This commit is contained in:
Václav Slavík
2018-06-12 20:27:50 +02:00
committed by Stefan Csomor
parent f4d4545873
commit cd02c548f4
1 changed files with 31 additions and 0 deletions
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31
src/osx/cocoa/nonownedwnd.mm
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@@ -305,6 +305,8 @@ static NSResponder* s_formerFirstResponder = NULL;
// controller
//
static void *EffectiveAppearanceContext = &EffectiveAppearanceContext;
@interface wxNonOwnedWindowController : NSObject <NSWindowDelegate>
{
}
@@ -611,6 +613,32 @@ extern int wxOSXGetIdFromSelector(SEL action );
}
}
- (void)addObservers:(NSWindow*)win
{
[win addObserver:self forKeyPath:@"effectiveAppearance"
options:0 context:EffectiveAppearanceContext];
}
- (void)removeObservers:(NSWindow*)win
{
[win removeObserver:self forKeyPath:@"effectiveAppearance" context:EffectiveAppearanceContext];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
if (context == EffectiveAppearanceContext)
{
wxNonOwnedWindowCocoaImpl* windowimpl = [(NSWindow*)object WX_implementation];
wxNonOwnedWindow* wxpeer = windowimpl ? windowimpl->GetWXPeer() : NULL;
if (wxpeer)
{
wxSysColourChangedEvent event;
event.SetEventObject(wxpeer);
wxpeer->HandleWindowEvent(event);
}
}
}
@end
wxIMPLEMENT_DYNAMIC_CLASS(wxNonOwnedWindowCocoaImpl , wxNonOwnedWindowImpl);
@@ -632,6 +660,7 @@ wxNonOwnedWindowCocoaImpl::~wxNonOwnedWindowCocoaImpl()
{
if ( !m_wxPeer->IsNativeWindowWrapper() )
{
[(wxNonOwnedWindowController*)[m_macWindow delegate] removeObservers:m_macWindow];
[m_macWindow setDelegate:nil];
// make sure we remove this first, otherwise the ref count will not lead to the
@@ -648,6 +677,7 @@ void wxNonOwnedWindowCocoaImpl::WillBeDestroyed()
{
if ( !m_wxPeer->IsNativeWindowWrapper() )
{
[(wxNonOwnedWindowController*)[m_macWindow delegate] removeObservers:m_macWindow];
[m_macWindow setDelegate:nil];
}
}
@@ -738,6 +768,7 @@ long style, long extraStyle, const wxString& WXUNUSED(name) )
[m_macWindow setLevel:m_macWindowLevel];
[m_macWindow setDelegate:controller];
[controller addObservers:m_macWindow];
if ( ( style & wxFRAME_SHAPED) )
{