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How to use refreshView method in fMBT

Best Python code snippet using fMBT_python

refresh.py

Source:refresh.py

1from toga_cocoa.libs import (2    SEL,3    NSClipView,4    NSEvent,5    NSEventPhaseEnded,6    NSLayoutAttributeCenterX,7    NSLayoutAttributeCenterY,8    NSLayoutAttributeHeight,9    NSLayoutAttributeNotAnAttribute,10    NSLayoutAttributeTop,11    NSLayoutAttributeWidth,12    NSLayoutConstraint,13    NSLayoutRelationEqual,14    NSMakePoint,15    NSMakeRect,16    NSNotificationCenter,17    NSPoint,18    NSProgressIndicator,19    NSProgressIndicatorSpinningStyle,20    NSRect,21    NSScrollElasticityAllowed,22    NSScrollView,23    NSView,24    NSViewBoundsDidChangeNotification,25    ObjCInstance,26    core_graphics,27    kCGScrollEventUnitLine,28    objc_method,29    send_super30)31HEADER_HEIGHT = 45.032class RefreshableClipView(NSClipView):33    @objc_method34    def constrainScrollPoint_(self, proposedNewOrigin: NSPoint) -> NSPoint:35        constrained = send_super(36            __class__, self, 'constrainScrollPoint:', proposedNewOrigin,37            restype=NSPoint, argtypes=[NSPoint]38        )39        if self.superview and self.superview.refreshTriggered:40            return NSMakePoint(41                constrained.x,42                max(proposedNewOrigin.y, -self.superview.refreshView.frame.size.height)43            )44        return constrained45    @objc_method46    def documentRect(self) -> NSRect:47        rect = send_super(__class__, self, 'documentRect', restype=NSRect, argtypes=[])48        if self.superview and self.superview.refreshTriggered:49            return NSMakeRect(50                rect.origin.x, rect.origin.y - self.superview.refreshView.frame.size.height,51                rect.size.width, rect.size.height + self.superview.refreshView.frame.size.height52            )53        return rect54class RefreshableScrollView(NSScrollView):55    # Create Header View56    @objc_method57    def viewDidMoveToWindow(self) -> None:58        self.refreshTriggered = False59        self.isRefreshing = False60        self.refreshView = None61        self.refreshIndicator = None62        self.createRefreshView()63    @objc_method64    def createContentView(self):65        superClipView = ObjCInstance(send_super(__class__, self, 'contentView'))66        if not isinstance(superClipView, RefreshableClipView):67            # create new clipview68            documentView = superClipView.documentView69            clipView = RefreshableClipView.alloc().initWithFrame(superClipView.frame)70            clipView.documentView = documentView71            clipView.copiesOnScroll = False72            clipView.drawsBackground = False73            self.setContentView(clipView)74            superClipView = ObjCInstance(send_super(__class__, self, 'contentView'))75        return superClipView76    @objc_method77    def createRefreshView(self) -> None:78        # delete old stuff if any79        if self.refreshView:80            self.refreshView.removeFromSuperview()81            self.refreshView.release()82            self.refreshView = None83        self.verticalScrollElasticity = NSScrollElasticityAllowed84        # create new content view85        self.createContentView()86        self.contentView.postsFrameChangedNotifications = True87        self.contentView.postsBoundsChangedNotifications = True88        NSNotificationCenter.defaultCenter.addObserver(89            self,90            selector=SEL('viewBoundsChanged:'),91            name=NSViewBoundsDidChangeNotification,92            object=self.contentView,93        )94        # Create view to hold the refresh widgets refreshview95        contentRect = self.contentView.documentView.frame96        self.refreshView = NSView.alloc().init()97        self.refreshView.translatesAutoresizingMaskIntoConstraints = False98        # Create spinner99        self.refreshIndicator = NSProgressIndicator.alloc().init()100        self.refreshIndicator.style = NSProgressIndicatorSpinningStyle101        self.refreshIndicator.translatesAutoresizingMaskIntoConstraints = False102        self.refreshIndicator.displayedWhenStopped = True103        self.refreshIndicator.usesThreadedAnimation = True104        self.refreshIndicator.indeterminate = True105        self.refreshIndicator.bezeled = False106        self.refreshIndicator.sizeToFit()107        # Center the spinner in the header108        self.refreshIndicator.setFrame(109            NSMakeRect(110                self.refreshView.bounds.size.width / 2 - self.refreshIndicator.frame.size.width / 2,111                self.refreshView.bounds.size.height / 2 - self.refreshIndicator.frame.size.height / 2,112                self.refreshIndicator.frame.size.width,113                self.refreshIndicator.frame.size.height114            )115        )116        # Put everything in place117        self.refreshView.addSubview(self.refreshIndicator)118        # self.refreshView.addSubview(self.refreshArrow)119        self.contentView.addSubview(self.refreshView)120        # set layout constraints121        indicatorHCenter = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(  # noqa: E501122            self.refreshIndicator, NSLayoutAttributeCenterX,123            NSLayoutRelationEqual,124            self.refreshView, NSLayoutAttributeCenterX,125            1.0, 0,126        )127        self.refreshView.addConstraint(indicatorHCenter)128        indicatorVCenter = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(  # noqa: E501129            self.refreshIndicator, NSLayoutAttributeCenterY,130            NSLayoutRelationEqual,131            self.refreshView, NSLayoutAttributeCenterY,132            1.0, 0,133        )134        self.refreshView.addConstraint(indicatorVCenter)135        refreshWidth = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(  # noqa: E501136            self.refreshView, NSLayoutAttributeWidth,137            NSLayoutRelationEqual,138            self.contentView, NSLayoutAttributeWidth,139            1.0, 0,140        )141        self.contentView.addConstraint(refreshWidth)142        refreshHeight = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(  # noqa: E501143            self.refreshView, NSLayoutAttributeHeight,144            NSLayoutRelationEqual,145            None, NSLayoutAttributeNotAnAttribute,146            1.0, HEADER_HEIGHT,147        )148        self.contentView.addConstraint(refreshHeight)149        refreshHeight = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(  # noqa: E501150            self.refreshView, NSLayoutAttributeTop,151            NSLayoutRelationEqual,152            self.contentView, NSLayoutAttributeTop,153            1.0, -HEADER_HEIGHT,154        )155        self.contentView.addConstraint(refreshHeight)156        # Scroll to top157        self.contentView.scrollToPoint(NSMakePoint(contentRect.origin.x, 0))158        self.reflectScrolledClipView(self.contentView)159    # Detecting scroll160    @objc_method161    def scrollWheel_(self, event) -> None:162        if event.phase == NSEventPhaseEnded:163            if self.refreshTriggered and not self.isRefreshing:164                self.reload()165        send_super(__class__, self, 'scrollWheel:', event)166    @objc_method167    def viewBoundsChanged_(self, note) -> None:168        if self.isRefreshing:169            return170        if self.contentView.bounds.origin.y <= -self.refreshView.frame.size.height:171            self.refreshTriggered = True172    # Reload173    @objc_method174    def reload(self) -> None:175        """Start a reload, starting the reload spinner"""176        self.isRefreshing = True177        self.refreshIndicator.startAnimation(self)178        self.interface.on_refresh(self.interface)179    @objc_method180    def finishedLoading(self):181        """Invoke to mark the end of a reload, stopping and hiding the reload spinner"""182        self.isRefreshing = False183        self.refreshTriggered = False184        self.refreshIndicator.stopAnimation(self)185        self.detailedlist.reloadData()186        # Force a scroll event to make the scroll hide the reload187        cgEvent = core_graphics.CGEventCreateScrollWheelEvent(None, kCGScrollEventUnitLine, 2, 1, 0)188        scrollEvent = NSEvent.eventWithCGEvent(cgEvent)...

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