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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2015 - ROLI Ltd.
Permission is granted to use this software under the terms of either:
a) the GPL v2 (or any later version)
b) the Affero GPL v3
Details of these licenses can be found at: www.gnu.org/licenses
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.juce.com for more information.
==============================================================================
*/
/**
This component runs in a slave 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 SlaveCanvasComponent : public Component,
private OSCSender,
private OSCReceiver,
private OSCReceiver::Listener<OSCReceiver::RealtimeCallback>,
private AsyncUpdater,
private Timer
{
public:
SlaveCanvasComponent (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);
}
~SlaveCanvasComponent()
{
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() / getWidth() + clientArea.getX());
message.addFloat32 (e.position.y * clientArea.getHeight() / 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().getDisplayContaining (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";
#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().getDisplayContaining (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().getDisplayContaining (getScreenBounds().getCentre());
return (display.userArea.toFloat() / (client->scaleFactor * display.dpi / display.scale)).withCentre (client->centre);
}
return {};
}
void timerCallback() override
{
send (newClientOSCAddress, clientName + ":" + getIPAddress()
+ ":" + 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 (SlaveCanvasComponent)
};
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