JUCE  v5.4.1-191-g0ab5e696f
JUCE API
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juce::DeviceChangeDetector Class Referenceabstract

#include <juce_win32_HiddenMessageWindow.h>

Inheritance diagram for juce::DeviceChangeDetector:
Collaboration diagram for juce::DeviceChangeDetector:

Public Member Functions

 DeviceChangeDetector (const wchar_t *const name)
 
virtual ~DeviceChangeDetector ()
 
virtual void systemDeviceChanged ()=0
 
void triggerAsyncDeviceChangeCallback ()
 

Private Member Functions

int getTimerInterval () const noexcept
 Returns the timer's interval. More...
 
bool isTimerRunning () const noexcept
 Returns true if the timer is currently running. More...
 
void startTimer (int intervalInMilliseconds) noexcept
 Starts the timer and sets the length of interval required. More...
 
void startTimerHz (int timerFrequencyHz) noexcept
 Starts the timer with an interval specified in Hertz. More...
 
void stopTimer () noexcept
 Stops the timer. More...
 
void timerCallback () override
 The user-defined callback routine that actually gets called periodically. More...
 

Static Private Member Functions

static void callAfterDelay (int milliseconds, std::function< void()> functionToCall)
 Invokes a lambda after a given number of milliseconds. More...
 
static void callPendingTimersSynchronously ()
 For internal use only: invokes any timers that need callbacks. More...
 
static LRESULT CALLBACK deviceChangeEventCallback (HWND h, const UINT message, const WPARAM wParam, const LPARAM lParam)
 

Private Attributes

HiddenMessageWindow messageWindow
 

Constructor & Destructor Documentation

◆ DeviceChangeDetector()

juce::DeviceChangeDetector::DeviceChangeDetector ( const wchar_t *const  name)
inline

◆ ~DeviceChangeDetector()

virtual juce::DeviceChangeDetector::~DeviceChangeDetector ( )
inlinevirtual

Member Function Documentation

◆ callAfterDelay()

static void juce::Timer::callAfterDelay ( int  milliseconds,
std::function< void()>  functionToCall 
)
staticinherited

Invokes a lambda after a given number of milliseconds.

◆ callPendingTimersSynchronously()

static void juce::Timer::callPendingTimersSynchronously ( )
staticinherited

For internal use only: invokes any timers that need callbacks.

Don't call this unless you really know what you're doing!

◆ deviceChangeEventCallback()

static LRESULT CALLBACK juce::DeviceChangeDetector::deviceChangeEventCallback ( HWND  h,
const UINT  message,
const WPARAM  wParam,
const LPARAM  lParam 
)
inlinestaticprivate

◆ getTimerInterval()

int juce::Timer::getTimerInterval ( ) const
inlinenoexceptinherited

Returns the timer's interval.

Returns
the timer's interval in milliseconds if it's running, or 0 if it's not.

References JUCE_CALLTYPE.

Referenced by juce::CarbonViewWrapperComponent::setOurSizeToEmbeddedViewSize().

◆ isTimerRunning()

bool juce::Timer::isTimerRunning ( ) const
inlinenoexceptinherited

Returns true if the timer is currently running.

◆ startTimer()

void juce::Timer::startTimer ( int  intervalInMilliseconds)
noexceptinherited

Starts the timer and sets the length of interval required.

If the timer is already started, this will reset it, so the time between calling this method and the next timer callback will not be less than the interval length passed in.

Parameters
intervalInMillisecondsthe interval to use (any value less than 1 will be rounded up to 1)

Referenced by juce::StandalonePluginHolder::init(), and juce::CarbonViewWrapperComponent::setOurSizeToEmbeddedViewSize().

◆ startTimerHz()

void juce::Timer::startTimerHz ( int  timerFrequencyHz)
noexceptinherited

Starts the timer with an interval specified in Hertz.

This is effectively the same as calling startTimer (1000 / timerFrequencyHz).

Referenced by juce::AnimatedPosition< Behaviour >::endDrag(), juce::AnimatedPosition< Behaviour >::nudge(), and juce::AnimatedPosition< Behaviour >::timerCallback().

◆ stopTimer()

void juce::Timer::stopTimer ( )
noexceptinherited

Stops the timer.

No more timer callbacks will be triggered after this method returns.

Note that if you call this from a background thread while the message-thread is already in the middle of your callback, then this method will cancel any future timer callbacks, but it will return without waiting for the current one to finish. The current callback will continue, possibly still running some of your timer code after this method has returned.

Referenced by juce::AnimatedPosition< Behaviour >::beginDrag(), juce::CarbonViewWrapperComponent::setOurSizeToEmbeddedViewSize(), juce::AnimatedPosition< Behaviour >::setPosition(), juce::AnimatedPosition< Behaviour >::timerCallback(), and juce::StandalonePluginHolder::~StandalonePluginHolder().

◆ systemDeviceChanged()

virtual void juce::DeviceChangeDetector::systemDeviceChanged ( )
pure virtual

◆ timerCallback()

void juce::DeviceChangeDetector::timerCallback ( )
inlineoverrideprivatevirtual

The user-defined callback routine that actually gets called periodically.

It's perfectly ok to call startTimer() or stopTimer() from within this callback to change the subsequent intervals.

Implements juce::Timer.

◆ triggerAsyncDeviceChangeCallback()

void juce::DeviceChangeDetector::triggerAsyncDeviceChangeCallback ( )
inline

Member Data Documentation

◆ messageWindow

HiddenMessageWindow juce::DeviceChangeDetector::messageWindow
private

The documentation for this class was generated from the following file: