Added preview image to print cluster monitor

CL-894

cura/CuraApplication.py

@@ -94,6 +94,7 @@ from . import CuraActions
 from cura.Scene import ZOffsetDecorator
 from . import CuraSplashScreen
 from . import CameraImageProvider
+from . import PrintJobPreviewImageProvider
 from . import MachineActionManager
 
 from cura.TaskManagement.OnExitCallbackManager import OnExitCallbackManager
@@ -523,6 +524,7 @@ class CuraApplication(QtApplication):
 
     def _onEngineCreated(self):
         self._qml_engine.addImageProvider("camera", CameraImageProvider.CameraImageProvider())
+        self._qml_engine.addImageProvider("print_job_preview", PrintJobPreviewImageProvider.PrintJobPreviewImageProvider())
 
     @pyqtProperty(bool)
     def needToShowUserAgreement(self):

cura/PrintJobPreviewImageProvider.py

@@ -0,0 +1,27 @@
+from PyQt5.QtGui import QImage
+from PyQt5.QtQuick import QQuickImageProvider
+from PyQt5.QtCore import QSize
+
+from UM.Application import Application
+
+
+class PrintJobPreviewImageProvider(QQuickImageProvider):
+    def __init__(self):
+        super().__init__(QQuickImageProvider.Image)
+
+    ##  Request a new image.
+    def requestImage(self, id, size):
+        # The id will have an uuid and an increment separated by a slash. As we don't care about the value of the
+        # increment, we need to strip that first.
+        uuid = id[id.find("/") + 1:]
+        for output_device in Application.getInstance().getOutputDeviceManager().getOutputDevices():
+            if not hasattr(output_device, "printJobs"):
+                continue
+
+            for print_job in output_device.printJobs:
+                if print_job.key == uuid:
+                    if print_job.getPreviewImage():
+                        return print_job.getPreviewImage(), QSize(15, 15)
+                    else:
+                        return QImage(), QSize(15, 15)
+        return QImage(), QSize(15,15)

cura/PrinterOutput/PrintJobOutputModel.py

@@ -4,6 +4,9 @@
 from PyQt5.QtCore import pyqtSignal, pyqtProperty, QObject, pyqtSlot
 from typing import Optional, TYPE_CHECKING
 
+from PyQt5.QtCore import QUrl
+from PyQt5.QtGui import QImage
+
 if TYPE_CHECKING:
     from cura.PrinterOutput.PrinterOutputController import PrinterOutputController
     from cura.PrinterOutput.PrinterOutputModel import PrinterOutputModel
@@ -19,6 +22,7 @@ class PrintJobOutputModel(QObject):
     assignedPrinterChanged = pyqtSignal()
     ownerChanged = pyqtSignal()
     configurationChanged = pyqtSignal()
+    previewImageChanged = pyqtSignal()
 
     def __init__(self, output_controller: "PrinterOutputController", key: str = "", name: str = "", parent=None) -> None:
         super().__init__(parent)
@@ -33,6 +37,27 @@ class PrintJobOutputModel(QObject):
 
         self._configuration = None  # type: Optional[ConfigurationModel]
 
+        self._preview_image_id = 0
+
+        self._preview_image = None
+
+    @pyqtProperty(QUrl, notify=previewImageChanged)
+    def preview_image_url(self):
+        self._preview_image_id += 1
+        # There is an image provider that is called "camera". In order to ensure that the image qml object, that
+        # requires a QUrl to function, updates correctly we add an increasing number. This causes to see the QUrl
+        # as new (instead of relying on cached version and thus forces an update.
+        temp = "image://print_job_preview/" + str(self._preview_image_id) + "/" + self._key
+        return QUrl(temp, QUrl.TolerantMode)
+
+    def getPreviewImage(self):
+        return self._preview_image
+
+    def updatePreviewImage(self, preview_image: Optional[QImage]):
+        if self._preview_image != preview_image:
+            self._preview_image = preview_image
+            self.previewImageChanged.emit()
+
     @pyqtProperty(QObject, notify=configurationChanged)
     def configuration(self) -> Optional["ConfigurationModel"]:
         return self._configuration

plugins/UM3NetworkPrinting/ClusterMonitorItem.qml

@@ -82,12 +82,13 @@ Component
                 leftMargin: UM.Theme.getSize("default_lining").width // To ensure border can be drawn.
                 rightMargin: UM.Theme.getSize("default_lining").width
                 right: parent.right
+                bottom: parent.bottom
             }
 
             ListView
             {
                 anchors.fill: parent
-                spacing: -UM.Theme.getSize("default_lining").height
+                spacing: UM.Theme.getSize("default_margin").height
 
                 model: OutputDevice.queuedPrintJobs
 

plugins/UM3NetworkPrinting/ClusterUM3OutputDevice.py

@@ -29,7 +29,7 @@ from .ClusterUM3PrinterOutputController import ClusterUM3PrinterOutputController
 from .SendMaterialJob import SendMaterialJob
 
 from PyQt5.QtNetwork import QNetworkRequest, QNetworkReply
-from PyQt5.QtGui import QDesktopServices
+from PyQt5.QtGui import QDesktopServices, QImage
 from PyQt5.QtCore import pyqtSlot, QUrl, pyqtSignal, pyqtProperty, QObject
 
 from time import time
@@ -394,11 +394,28 @@ class ClusterUM3OutputDevice(NetworkedPrinterOutputDevice):
         super().connect()
         self.sendMaterialProfiles()
 
+    def _onGetPreviewImageFinished(self, reply: QNetworkReply) -> None:
+        reply_url = reply.url().toString()
+        print(reply_url)
+
+        uuid = reply_url[reply_url.find("print_jobs/")+len("print_jobs/"):reply_url.rfind("/preview_image")]
+
+        print_job = findByKey(self._print_jobs, uuid)
+        if print_job:
+            image = QImage()
+            image.loadFromData(reply.readAll())
+            print_job.updatePreviewImage(image)
+
+
     def _update(self) -> None:
         super()._update()
         self.get("printers/", on_finished = self._onGetPrintersDataFinished)
         self.get("print_jobs/", on_finished = self._onGetPrintJobsFinished)
 
+        for print_job in self._print_jobs:
+            if print_job.getPreviewImage() is None:
+                self.get("print_jobs/{uuid}/preview_image".format(uuid=print_job.key), on_finished=self._onGetPreviewImageFinished)
+
     def _onGetPrintJobsFinished(self, reply: QNetworkReply) -> None:
         if not checkValidGetReply(reply):
             return

plugins/UM3NetworkPrinting/PrintJobInfoBlock.qml

@@ -44,6 +44,15 @@ Item
                 text: "OwnerName"
             }
 
+            Image
+            {
+                source: printJob.preview_image_url
+                anchors.top: ownerName.bottom
+                anchors.horizontalCenter: parent.horizontalCenter
+                anchors.bottom: totalTimeLabel.top
+                width: height
+            }
+
             Label
             {
                 id: totalTimeLabel