Improve thumbnail loading performance, relocate search button

admin.py

@@ -88,13 +88,18 @@ def install(
     built_directory = build(context, clean=True) \
         if build_src else LOCAL_ROOT_DIR / "build" / SRC_NAME
 
-    root_directory = Path.home() / \
-                     f".local/share/QGIS/QGIS3/profiles/" \
-                     f"{context.obj['qgis_profile']}"
+    if os.name != "posix":
+        root_directory = Path.home() / \
+                        f"AppData/Roaming/QGIS/QGIS3/profiles/" \
+                        f"{context.obj['qgis_profile']}"
+    else:
+        root_directory = Path.home() / \
+                        f".local/share/QGIS/QGIS3/profiles/" \
+                        f"{context.obj['qgis_profile']}"
 
     base_target_directory = root_directory / "python/plugins" / SRC_NAME
     _log(f"Copying built plugin to {base_target_directory}...", context=context)
-    shutil.copytree(built_directory, base_target_directory)
+    shutil.copytree(built_directory, base_target_directory, dirs_exist_ok=True)
     _log(
         f"Installed {str(built_directory)!r}"
         f" into {str(base_target_directory)!r}",
@@ -273,7 +278,8 @@ def compile_resources(
     target_path = output_directory / "resources.py"
     target_path.parent.mkdir(parents=True, exist_ok=True)
     _log(f"compile_resources target_path: {target_path}", context=context)
-    subprocess.run(shlex.split(f"pyrcc5 -o {target_path} {resources_path}"))
+    is_posix = os.name == "posix"
+    subprocess.run(shlex.split(f"pyrcc5 -o {target_path} {resources_path}", posix=is_posix))
 
 
 @app.command()

src/qgis_stac/gui/qgis_stac_widget.py

@@ -537,6 +537,8 @@ def search_items(self):
         sort_order = SortOrder.DESCENDING \
             if self.reverse_order_box.isChecked() else SortOrder.ASCENDING
 
+        self.cancel_loading_thumbnails()
+
         self.api_client.get_items(
             ItemSearch(
                 collections=collections,
@@ -902,10 +904,16 @@ def all_footprints_btn_clicked(self):
 
     def clear_search_results(self):
         """ Clear current search results from the UI"""
+        self.cancel_loading_thumbnails()
         self.scroll_area.setWidget(QtWidgets.QWidget())
         self.result_items_la.clear()
         self.result_items = []
 
+    def cancel_loading_thumbnails(self):
+        """ Cancel any thumbnails which are still loading"""
+        for riw in self.scroll_area.findChildren(ResultItemWidget): 
+            riw.cancel_thumbnail()
+
     def filter_changed(self, filter_text):
         """
         Sets the filter on the collections proxy model and trigger

src/qgis_stac/gui/queryable_property.py

@@ -89,6 +89,7 @@ def initialize_ui(self):
             QueryablePropertyType.DATETIME.value:
 
             datetime_edit = QgsDateTimeEdit()
+            datetime_edit.clear()
             datetime_edit.setSizePolicy(size_policy)
 
             input_layout.addWidget(datetime_edit)

src/qgis_stac/gui/result_item_widget.py

@@ -83,6 +83,8 @@ def __init__(
         self.item = item
         self.title_la.setText(item.id)
         self.thumbnail_url = None
+        self.thumbnail_task = None
+        self.thumbnail_task_id = None
         self.date_time_format = "%Y-%m-%dT%H:%M:%S"
         self.simple_date_format = "%m/%d/%Y"
         self.main_widget = main_widget
@@ -317,6 +319,12 @@ def add_thumbnail(self):
             self.thumbnail_response
         )
 
+    def cancel_thumbnail(self):
+        """ Cancel loading thumbnail if it's still in progress"""
+        task = QgsApplication.taskManager().task(self.thumbnail_task_id)
+        if self.thumbnail_task_id and task:
+            task.cancel()
+
     def thumbnail_response(self, content):
         """ Callback to handle the thumbnail network response.
             Sets the thumbnail image data into the widget thumbnail label.
@@ -347,17 +355,20 @@ def network_task(
         :param auth_config: Authentication configuration string
         :type auth_config: str
         """
-        task = QgsNetworkContentFetcherTask(
+        self.thumbnail_task = QgsNetworkContentFetcherTask(
             request,
-            authcfg=auth_config
+            authcfg=auth_config,
+            flags=QgsTask.CanCancel|QgsTask.CancelWithoutPrompt|QgsTask.Silent
         )
         response_handler = partial(
             self.response,
-            task,
+            self.thumbnail_task,
             handler
         )
-        task.fetched.connect(response_handler)
-        task.run()
+
+        self.thumbnail_task.fetched.connect(response_handler)
+        self.thumbnail_task_id = QgsApplication.taskManager().addTask(self.thumbnail_task)
+
 
     def response(
             self,
@@ -369,13 +380,14 @@ def response(
         :param task: QGIS task that fetches network content
         :type task:  QgsNetworkContentFetcherTask
         """
-        reply = task.reply()
-        error = reply.error()
-        if error == QtNetwork.QNetworkReply.NoError:
-            contents: QtCore.QByteArray = reply.readAll()
-            handler(contents)
-        else:
-            log(tr("Problem fetching response from network"))
+        if not task.isCanceled():
+            reply = task.reply()
+            error = reply.error()
+            if error == QtNetwork.QNetworkReply.NoError:
+                contents: QtCore.QByteArray = reply.readAll()
+                handler(contents)
+            else:
+                log(tr("Problem fetching response from network"))
 
 
 def add_footprint_helper(item, main_widget):