Saving map as image using MapCanvas in PyQGIS

Question

I have created a standalone application to display the vector layer using PyQGIS code given below. Now I want to download the map which shows on the window with whatever the zoom level I have chosen.

from qgis.gui import *
from qgis.PyQt.QtWidgets import QAction, QMainWindow
from qgis.PyQt.QtCore import Qt
class MyWnd(QMainWindow):
 def __init__(self, layer):
 QMainWindow.__init__(self)
 self.canvas = QgsMapCanvas()
 self.canvas.setCanvasColor(Qt.white)
 self.canvas.setExtent(layer.extent())
 self.canvas.setLayers([layer])
 self.setCentralWidget(self.canvas)
 self.actionZoomIn = QAction("Zoom in", self)
 self.actionZoomOut = QAction("Zoom out", self)
 self.actionPan = QAction("Pan", self)
 self.actionZoomIn.setCheckable(True)
 self.actionZoomOut.setCheckable(True)
 self.actionPan.setCheckable(True)
 self.actionZoomIn.triggered.connect(self.zoomIn)
 self.actionZoomOut.triggered.connect(self.zoomOut)
 self.actionPan.triggered.connect(self.pan)
 self.toolbar = self.addToolBar("Canvas actions")
 self.toolbar.addAction(self.actionZoomIn)
 self.toolbar.addAction(self.actionZoomOut)
 self.toolbar.addAction(self.actionPan)
 # create the map tools
 self.toolPan = QgsMapToolPan(self.canvas)
 self.toolPan.setAction(self.actionPan)
 self.toolZoomIn = QgsMapToolZoom(self.canvas, False) # false = in
 self.toolZoomIn.setAction(self.actionZoomIn)
 self.toolZoomOut = QgsMapToolZoom(self.canvas, True) # true = out
 self.toolZoomOut.setAction(self.actionZoomOut)
 self.pan()
 def zoomIn(self):
 self.canvas.setMapTool(self.toolZoomIn)
 def zoomOut(self):
 self.canvas.setMapTool(self.toolZoomOut)
 def pan(self):
 self.canvas.setMapTool(self.toolPan)
w = MyWnd(iface.activeLayer())
w.show()

No idea how to provide a download option within this window.

• Codee: @KadirŞahbaz using QGIS 3.8.Thanks for ur reply. I have changed the import now.

Answer 1

Add the following lines to save the map as image. This is a minimal solution.

Add these lines to __init__ method:

self.actionSaveAsImage = QAction("Save As Image", self)
self.actionSaveAsImage.triggered.connect(self.saveAsImage)
self.toolbar.addAction(self.actionSaveAsImage)

And add this as a new method to the class: (change image path)

def saveAsImage(self):
 self.canvas.saveAsImage("/path/to/image.png")

enter image description here