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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 7 End-User License
Agreement and JUCE Privacy Policy.
End User License Agreement: www.juce.com/juce-7-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
/**
This component runs in a client process, draws the part of the canvas that this
particular client covers, and updates itself when messages arrive from the master
containing new canvas states.
*/
class ClientCanvasComponent : public Component,
private OSCSender,
private OSCReceiver,
private OSCReceiver::Listener<OSCReceiver::RealtimeCallback>,
private AsyncUpdater,
private Timer
{
public:
ClientCanvasComponent (PropertiesFile& p, int windowIndex) : properties (p)
{
{
String uuidPropName ("UUID" + String (windowIndex));
clientName = properties.getValue (uuidPropName);
if (clientName.isEmpty())
{
clientName = "CLIENT_" + String (Random().nextInt (10000)).toUpperCase();
properties.setValue (uuidPropName, clientName);
}
}
setOpaque (true);
setSize (1500, 900);
if (! OSCSender::connect (getBroadcastIPAddress(), clientPortNumber))
error = "Client app OSC sender: network connection error.";
if (! OSCReceiver::connect (masterPortNumber))
error = "Client app OSC receiver: network connection error.";
OSCReceiver::addListener (this);
timerCallback();
startTimer (2000);
}
~ClientCanvasComponent() override
{
OSCReceiver::removeListener (this);
}
private:
void mouseDrag (const MouseEvent& e) override
{
auto clientArea = getAreaInGlobalSpace();
if (! clientArea.isEmpty())
{
OSCMessage message (userInputOSCAddress);
message.addString (clientName);
message.addFloat32 (e.position.x * clientArea.getWidth() / (float) getWidth() + clientArea.getX());
message.addFloat32 (e.position.y * clientArea.getHeight() / (float) getHeight() + clientArea.getY());
send (message);
}
}
//==============================================================================
void oscMessageReceived (const OSCMessage& message) override
{
auto address = message.getAddressPattern();
if (address.matches (canvasStateOSCAddress))
canvasStateOSCMessageReceived (message);
}
struct NewStateMessage : public Message
{
NewStateMessage (const MemoryBlock& d) : data (d) {}
MemoryBlock data;
};
void canvasStateOSCMessageReceived (const OSCMessage& message)
{
if (message.isEmpty() || ! message[0].isBlob())
return;
if (packetiser.appendIncomingBlock (message[0].getBlob()))
{
const ScopedLock sl (canvasLock);
MemoryBlock newCanvasData;
if (packetiser.reassemble (newCanvasData))
{
MemoryInputStream i (newCanvasData.getData(), newCanvasData.getSize(), false);
canvas2.load (i);
triggerAsyncUpdate();
}
}
}
//==============================================================================
String getMachineInfoToDisplay() const
{
auto* display = Desktop::getInstance().getDisplays().getDisplayForPoint (getScreenBounds().getCentre());
return getOSName() + " " + String (display->dpi) + " " + String (display->scale);
}
static String getOSName()
{
#if JUCE_MAC
return "Mac OSX";
#elif JUCE_ANDROID
return "Android";
#elif JUCE_IOS
return "iOS";
#elif JUCE_WINDOWS
return "Windows";
#elif JUCE_LINUX
return "Linux";
#elif JUCE_BSD
return "BSD";
#endif
}
void paint (Graphics& g) override
{
g.fillAll (canvas.backgroundColour);
auto clientArea = getAreaInGlobalSpace();
if (clientArea.isEmpty())
{
g.setColour (Colours::red.withAlpha (0.5f));
g.setFont (20.0f);
g.drawText ("Not Connected", getLocalBounds(), Justification::centred, false);
return;
}
canvas.draw (g, getLocalBounds().toFloat(), clientArea);
g.setFont (Font (34.0f));
g.setColour (Colours::white.withAlpha (0.6f));
g.drawText (getMachineInfoToDisplay(),
getLocalBounds().reduced (10).removeFromBottom (20),
Justification::centredRight, true);
if (error.isNotEmpty())
{
g.setColour (Colours::red);
g.drawText (error, getLocalBounds().reduced (10).removeFromBottom (80),
Justification::centredRight, true);
}
}
Rectangle<float> getAreaInGlobalSpace() const
{
if (auto client = canvas.findClient (clientName))
{
auto screenBounds = getScreenBounds();
auto* display = Desktop::getInstance().getDisplays().getDisplayForPoint (screenBounds.getCentre());
return ((screenBounds - display->userArea.getCentre()).toFloat() / (client->scaleFactor * display->dpi / display->scale)) + client->centre;
}
return {};
}
Rectangle<float> getScreenAreaInGlobalSpace() const
{
if (auto client = canvas.findClient (clientName))
{
auto* display = Desktop::getInstance().getDisplays().getDisplayForPoint (getScreenBounds().getCentre());
return (display->userArea.toFloat() / (client->scaleFactor * display->dpi / display->scale)).withCentre (client->centre);
}
return {};
}
void timerCallback() override
{
send (newClientOSCAddress, clientName + ":" + IPAddress::getLocalAddress().toString()
+ ":" + getScreenAreaInGlobalSpace().toString());
}
void handleAsyncUpdate() override
{
const ScopedLock sl (canvasLock);
canvas.swapWith (canvas2);
repaint();
}
SharedCanvasDescription canvas, canvas2;
PropertiesFile& properties;
String clientName, error;
CriticalSection canvasLock;
BlockPacketiser packetiser;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ClientCanvasComponent)
};
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