Submit Pull to Refresh sample.

PullToRefresh/.gitignore

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+*.swp
+*.un~
+*.bar
+*.pyc

PullToRefresh/.gitmodules

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+[submodule "blackberry-py"]
+	path = blackberry-py
+	url = [email protected]:HorizonXP/blackberry-py.git
+[submodule "adn"]
+	path = adn
+	url = [email protected]:HorizonXP/python-adn.git
+[submodule "requests"]
+	path = requests
+	url = [email protected]:HorizonXP/requests.git

PullToRefresh/README.md

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+blackberry-py-pulltorefresh
+===========================
+
+A BlackBerry-Py sample that demonstrates pull-to-refresh with the App.net global stream.
+
+Works on the release version of BlackBerry 10.0.9. Currently uses BBPy (http://blackberry-py.microcode.ca/) but the QML should work just fine in your C++-based project so you can implement pull-to-refresh functionality.

PullToRefresh/app/__init__.py

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+'''Entry point for Tart Application on the Python side.'''
+
+# blackberry_tart.py will import this module and execute App().start()
+from .app import App

PullToRefresh/app/app.py

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+
+import tart
+
+class App(tart.Application):
+    def onUiReady(self):
+        pass
+
+    def onGetGlobalStream(self):
+        from adn.adn import Adn
+        app = Adn()
+        self.stream = app.globalStream()
+        validStream = True
+        for item in self.stream['data']:
+            if 'html' in item:
+                item['html'] = item['html'].replace("<br>", "<br/>")
+                validStream = True
+            else:
+                validStream = False
+        if validStream:
+            tart.send('receivedGlobalStream', stream=self.stream)
+            import tempfile
+            temp_dir = tempfile.gettempdir()
+            import os
+            for the_file in os.listdir(temp_dir):
+                filepath = os.path.join(temp_dir, the_file)
+                try: 
+                    if os.path.isfile(filepath):
+                        os.unlink(filepath)
+                except Exception as e:
+                    print(e)
+            self.getAvatarImages()
+        else:
+            self.onGetGlobalStream()
+
+    def getAvatarImages(self):
+        from .multirequest import MultiRequest
+        multiRequester = MultiRequest(self.mapGetImage, 5)
+        requests = list()
+        for (index,item) in enumerate(self.stream['data']):
+            if 'user' in item and 'avatar_image' in item['user']:
+                requests.append(item['user']['avatar_image']['url'])
+        multiRequester.get(requests)
+
+    def mapGetImage(self, index, url):
+        import requests
+        import tempfile
+        r = requests.get(url)
+        f = tempfile.NamedTemporaryFile(delete=False)
+        try:
+            f.write(r.content)
+            filename = f.name
+            avatar_image = dict()
+            avatar_image['url'] = filename
+            avatar_image['index'] = index
+            tart.send('updateAvatarImage', avatar_image=avatar_image)
+        finally:
+            f.close()
+
+

PullToRefresh/app/multirequest.py

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+
+import threading
+import queue
+
+
+class MultiRequest:
+    DEFAULT_NUM_THREADS = 4
+
+    def __init__(self, handler, num_threads=DEFAULT_NUM_THREADS):
+        self.num_threads = num_threads
+        self.threads = []
+        self.queue = queue.Queue()
+        self.handler = handler
+
+
+    def get(self, requests):
+        if not self.threads:
+            for i in range(self.num_threads):
+                t = threading.Thread(target=self.run)
+                t.daemon = True
+                t.start()
+                self.threads.append(t)
+
+        for (index,r) in enumerate(requests):
+            self.queue.put((index,r))
+
+
+    def run(self):
+        '''called in a thread to process requests by calling the handler'''
+        while 1:
+            (index,url) = self.queue.get()
+            self.handler(index, url)

PullToRefresh/assets/ADNPostItemComponent.qml

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+import bb.cascades 1.0
+import "../tart.js" as Tart
+
+ListItemComponent {
+    Container {
+        property int spacing: 25
+
+        topPadding: spacing
+        leftPadding: spacing
+        rightPadding: spacing
+
+        Container {
+            layout: StackLayout {
+                orientation: LayoutOrientation.LeftToRight
+            }
+            background: Color.create("#404040");
+            horizontalAlignment: HorizontalAlignment.Fill
+            verticalAlignment: VerticalAlignment.Fill
+            minHeight: 150
+
+            property int border: 1
+
+            topPadding: border
+            bottomPadding: border
+            leftPadding: border
+            rightPadding: border
+
+            Container {
+                layout: StackLayout {
+                    orientation: LayoutOrientation.LeftToRight
+                }
+                background: Color.create("#e2e2e2");
+                horizontalAlignment: HorizontalAlignment.Fill
+                verticalAlignment: VerticalAlignment.Fill
+                minHeight: 150
+
+                property int padding: 5
+
+                topPadding: padding
+                bottomPadding: padding
+                leftPadding: padding
+                rightPadding: padding
+
+                Container {
+                    layout: DockLayout {}
+                    layoutProperties: StackLayoutProperties {
+                        spaceQuota: 2.0
+                    }
+
+                    ImageView {
+                        imageSource: ListItemData.user.avatar_image.url
+                        preferredWidth: 200
+                        preferredHeight: 200
+                        scalingMethod: ScalingMethod.AspectFit
+                        loadEffect: ImageViewLoadEffect.Subtle
+                    }
+                }
+
+                Container {
+                    layout: StackLayout {}
+                    layoutProperties: StackLayoutProperties {
+                        spaceQuota: 8.0
+                    }
+
+                    leftMargin: 25
+
+                    Label {
+                        text: ListItemData.user.username
+                        horizontalAlignment: HorizontalAlignment.Left
+
+                        textStyle {
+                            fontWeight: FontWeight.Bold
+                        }
+                    }
+
+                    Label {
+                        text: "<html>" + ListItemData.html + "</html>"
+                        multiline: true
+                        horizontalAlignment: HorizontalAlignment.Left
+                    }
+
+                    Container {
+                        layout: DockLayout {}
+                        horizontalAlignment: HorizontalAlignment.Right
+
+                        Label {
+                            text: ListItemData.created_at
+                            horizontalAlignment: HorizontalAlignment.Right
+                            verticalAlignment: VerticalAlignment.Bottom
+                            textStyle {
+                                textAlign: TextAlign.Right
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

PullToRefresh/assets/AppMenuDefinition.qml

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+import bb.cascades 1.0
+import "../tart.js" as Tart
+
+MenuDefinition {
+    signal triggerSettingsPage
+    signal triggerHelpPage
+
+    settingsAction: SettingsActionItem {
+        onTriggered: {
+            triggerSettingsPage();
+        }
+    }
+    helpAction: HelpActionItem {
+        onTriggered: {
+            triggerHelpPage();
+        }
+    }
+}

PullToRefresh/assets/HelpPage.qml

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+import bb.cascades 1.0
+import "../tart.js" as Tart
+
+
+Page {
+    Container {
+        layout: DockLayout {}
+
+        Label {
+            text: "Help Page"
+            horizontalAlignment: HorizontalAlignment.Center
+            verticalAlignment: VerticalAlignment.Center
+        }
+    }
+}

PullToRefresh/assets/MainPage.qml

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+import bb.cascades 1.0
+import "../tart.js" as Tart
+
+Page {
+    id: page
+    signal addItem(variant entry)
+    signal updateAvatarImage(int index, string url)
+
+    property bool showLoading: true
+
+    onAddItem: {
+        modelGlobalStream.append(entry);
+        showLoading = false;
+    }
+
+    onUpdateAvatarImage: {
+        var item = modelGlobalStream.value(index);
+        item.user.avatar_image.url = url;
+        modelGlobalStream.replace(index, item);
+    }
+
+    Container {
+        layout: DockLayout {}
+
+        background: bg.imagePaint
+        attachedObjects: [
+            ImagePaintDefinition {
+                id: bg
+                repeatPattern: RepeatPattern.XY
+                imageSource: "asset:///images/bg.amd"
+            }
+        ]
+
+        ListView {
+            id: listGlobalStream
+            dataModel: ArrayDataModel {
+                id: modelGlobalStream
+            }
+            horizontalAlignment: HorizontalAlignment.Fill
+            verticalAlignment: VerticalAlignment.Fill
+
+            leadingVisual: PullToRefresh {
+                onRefreshTriggered: {
+                    console.log("Refresh triggered!", modelGlobalStream.size());
+                    modelGlobalStream.clear();
+                    showLoading = true;
+                    Tart.send('getGlobalStream');
+                }
+            }
+
+            listItemComponents: [
+                ADNPostItemComponent {}
+            ]
+        }
+
+        ActivityIndicator {
+            running: true
+            visible: page.showLoading
+            preferredWidth: 350
+            horizontalAlignment: HorizontalAlignment.Center
+            verticalAlignment: VerticalAlignment.Center
+        }
+    }
+}

PullToRefresh/assets/PullToRefresh.qml

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+import bb.cascades 1.0
+import "../tart.js" as Tart
+
+Container {
+    signal refreshTriggered
+
+    layout: StackLayout {}
+
+    ImageView {
+        id: imgRefreshIcon
+        imageSource: "asset:///images/refreshicon.png"
+        horizontalAlignment: HorizontalAlignment.Center
+        topMargin: 25
+    }
+
+    Label {
+        id: lblRefresh
+        text: "Pull down to refresh results..."
+        horizontalAlignment: HorizontalAlignment.Center
+        topMargin: 25
+        bottomMargin: 25
+    }
+
+    Divider {
+        opacity: 0.0
+    }
+
+    attachedObjects: [
+        LayoutUpdateHandler {
+            id: refreshHandler
+
+            onLayoutFrameChanged: {
+                imgRefreshIcon.rotationZ = layoutFrame.y;
+
+                if (layoutFrame.y >= 0.0 * layoutFrame.height) {
+                    lblRefresh.text = "Release to refresh results..."
+
+                    if (layoutFrame.y == 0) {
+                        refreshTriggered();
+                    }
+                } else {
+                    lblRefresh.text = "Pull down to refresh results..."
+                }
+            }
+        }
+    ]
+}

PullToRefresh/assets/SettingsPage.qml

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+import bb.cascades 1.0
+import "../tart.js" as Tart
+
+
+Page {
+    Container {
+        layout: DockLayout {}
+
+        Label {
+            text: "Settings Page"
+            horizontalAlignment: HorizontalAlignment.Center
+            verticalAlignment: VerticalAlignment.Center
+        }
+    }
+}

PullToRefresh/assets/images/bg.amd

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+#RimCascadesAssetMetaData version=1.0
+source: "bg.png"
+repeatable: true