public abstract class InfiniteContainer
ImplementsAnimation, Editable, Iterable<Component>, StyleListener
This abstract Container can scroll indefinitely (or at least until
we run out of data).
This class uses the com.codename1.components.InfiniteScrollAdapter to bring more data and the pull to
refresh feature to refresh current displayed data.
The sample code shows the usage of the nestoria API to fill out an infinitely scrolling list.
public void showForm() {
Form hi = new Form("InfiniteContainer", new BorderLayout());
Style s = UIManager.getInstance().getComponentStyle("MultiLine1");
FontImage p = FontImage.createMaterial(FontImage.MATERIAL_PORTRAIT, s);
EncodedImage placeholder = EncodedImage.createFromImage(p.scaled(p.getWidth() * 3, p.getHeight() * 3), false);
InfiniteContainer ic = new InfiniteContainer() {
@Override
public Component[] fetchComponents(int index, int amount) {
java.util.List> data = fetchPropertyData("Leeds");
MultiButton[] cmps = new MultiButton[data.size()];
for(int iter = 0 ; iter currentListing = data.get(iter);
if(currentListing == null) {
return null;
}
String thumb_url = (String)currentListing.get("thumb_url");
String guid = (String)currentListing.get("guid");
String summary = (String)currentListing.get("summary");
cmps[iter] = new MultiButton(summary);
cmps[iter].setIcon(URLImage.createToStorage(placeholder, guid, thumb_url));
}
return cmps;
}
};
hi.add(BorderLayout.CENTER, ic);
hi.show();
}
int pageNumber = 1;
java.util.List<Map<String, Object>> fetchPropertyData(String text) {
try {
ConnectionRequest r = new ConnectionRequest();
r.setPost(false);
r.setUrl("http://api.nestoria.co.uk/api");
r.addArgument("pretty", "0");
r.addArgument("action", "search_listings");
r.addArgument("encoding", "json");
r.addArgument("listing_type", "buy");
r.addArgument("page", "" + pageNumber);
pageNumber++;
r.addArgument("country", "uk");
r.addArgument("place_name", text);
NetworkManager.getInstance().addToQueueAndWait(r);
Map result = new JSONParser().parseJSON(new InputStreamReader(new ByteArrayInputStream(r.getResponseData()), "UTF-8"));
Map response = (Map)result.get("response");
return (java.util.List<Map<String, Object>>)response.get("listings");
} catch(Exception err) {
Log.e(err);
return null;
}
}
int pageNumber = 1;
java.util.List<Map<String, Object>> fetchPropertyData(String text) {
try {
ConnectionRequest r = new ConnectionRequest();
r.setPost(false);
r.setUrl("http://api.nestoria.co.uk/api");
r.addArgument("pretty", "0");
r.addArgument("action", "search_listings");
r.addArgument("encoding", "json");
r.addArgument("listing_type", "buy");
r.addArgument("page", "" + pageNumber);
pageNumber++;
r.addArgument("country", "uk");
r.addArgument("place_name", text);
NetworkManager.getInstance().addToQueueAndWait(r);
Map result = new JSONParser().parseJSON(new InputStreamReader(new ByteArrayInputStream(r.getResponseData()), "UTF-8"));
Map response = (Map)result.get("response");
return (java.util.List<Map<String, Object>>)response.get("listings");
} catch(Exception err) {
Log.e(err);
return null;
}
}
Constructors
public InfiniteContainer() | Creates the InfiniteContainer. |
public InfiniteContainer(int amount) | Creates the InfiniteContainer. |
Methods
protected void initComponent() | Allows subclasses to bind functionality that relies on fully initialized and “ready for action” component state |
public void refresh() | This refreshes the UI in a similar way to the “pull to refresh” functionality |
public void continueFetching() | If we previously added returned null when fetching components this method can continue the process of fetching. |
protected boolean isAsync() | Indicates whether int) should be invoked asynchronously off the EDT |
public abstract Component[] fetchComponents(int index, int amount) | This is an abstract method that should be implemented by the sub classes to fetch the data. |
public InfiniteProgress getInfiniteProgress() | Lets us manipulate the infinite progress object e.g. set the animation image etc. |
Inherited fields
From Component
DEFAULT_CURSOR, CROSSHAIR_CURSOR, TEXT_CURSOR, WAIT_CURSOR, SW_RESIZE_CURSOR, SE_RESIZE_CURSOR, NW_RESIZE_CURSOR, NE_RESIZE_CURSOR, N_RESIZE_CURSOR, S_RESIZE_CURSOR, W_RESIZE_CURSOR, E_RESIZE_CURSOR, HAND_CURSOR, MOVE_CURSOR, DRAG_REGION_NOT_DRAGGABLE, DRAG_REGION_POSSIBLE_DRAG_X, DRAG_REGION_POSSIBLE_DRAG_Y, DRAG_REGION_POSSIBLE_DRAG_XY, DRAG_REGION_LIKELY_DRAG_X, DRAG_REGION_LIKELY_DRAG_Y, DRAG_REGION_LIKELY_DRAG_XY, DRAG_REGION_IMMEDIATELY_DRAG_X, DRAG_REGION_IMMEDIATELY_DRAG_Y, DRAG_REGION_IMMEDIATELY_DRAG_XY, BRB_CONSTANT_ASCENT, BRB_CONSTANT_DESCENT, BRB_CENTER_OFFSET, BRB_OTHER, CENTER, TOP, LEFT, BOTTOM, RIGHT, BASELINE
Inherited methods
From Container
encloseIn, encloseIn, initLaf, getUIManager, setUIManager, isSurface, add, addAll, add, add, add, add, add, getLeadComponent, setLeadComponent, getLeadParent, keyPressed, keyReleased, getLayout, setLayout, invalidate, setShouldLayout, setShouldCalcPreferredSize, getLayoutWidth, getLayoutHeight, applyRTL, constrainWidthWhenScrollable, constrainHeightWhenScrollable, addComponent, addComponent, addComponent, addComponent, replaceAndWait, replaceAndWait, replace, replaceAndWait, replace, createReplaceTransition, isEnabled, setEnabled, removeComponent, cancelRepaints, flushReplace, removeAll, revalidateWithAnimationSafety, revalidate, revalidateLater, forceRevalidate, clearClientProperties, paint, paintGlass, layoutContainer, isSafeArea, setSafeArea, isSafeAreaRoot, getSafeAreaRoot, setSafeAreaRoot, getComponentCount, getComponentAt, getComponentIndex, contains, scrollComponentToVisible, getClosestComponentTo, getResponderAt, getComponentAt, findDropTargetAt, pointerPressed, calcPreferredSize, paramString, refreshTheme, isScrollableX, setScrollableX, isScrollableY, setScrollableY, getSideGap, getBottomGap, setScrollable, setCellRenderer, getScrollIncrement, setScrollIncrement, findFirstFocusable, dragInitiated, fireClicked, isSelectableInteraction, getGridPosY, paintComponentBackground, getGridPosX, animateHierarchyAndWait, createAnimateHierarchy, animateHierarchy, animateHierarchyFadeAndWait, createAnimateHierarchyFade, animateHierarchyFade, animateLayoutFadeAndWait, createAnimateLayoutFadeAndWait, animateLayoutFade, createAnimateLayoutFade, animateLayoutAndWait, animateLayout, updateTabIndices, createAnimateLayout, drop, createAnimateMotion, morph, morphAndWait, animateUnlayout, animateUnlayoutAndWait, createAnimateUnlayout, getChildrenAsList, iterator, iterator
From Component
setSameSize, isSetCursorSupported, parsePreferredSize, getDefaultDragTransparency, setDefaultDragTransparency, getEditingDelegate, setEditingDelegate, getCursor, setCursor, showNativeOverlay, hideNativeOverlay, updateNativeOverlay, getNativeOverlay, getAllStyles, getSameWidth, setSameWidth, getSameHeight, setSameHeight, getX, setX, getOuterX, getInnerX, getY, setY, getOuterY, getInnerY, isVisible, setVisible, getClientProperty, stripMarginAndPadding, putClientProperty, getDirtyRegion, setDirtyRegion, isOpaque, setOpaque, getWidth, setWidth, getOuterWidth, getInnerWidth, getHeight, setHeight, getOuterHeight, getInnerHeight, isDragRegion, getDragRegionStatus, getBaseline, getBaselineResizeBehavior, getPreferredSizeStr, setPreferredSizeStr, getPreferredSize, setPreferredSize, getScrollDimension, calcScrollSize, setScrollSize, getPreferredW, setPreferredW, getPreferredH, setPreferredH, getOuterPreferredH, getInnerPreferredH, getOuterPreferredW, getInnerPreferredW, setSize, getUIID, setUIID, setUIIDFinal, setUIID, getInlineAllStyles, setInlineAllStyles, getInlineSelectedStyles, setInlineSelectedStyles, getInlineUnselectedStyles, setInlineUnselectedStyles, getInlineDisabledStyles, setInlineDisabledStyles, getInlinePressedStyles, setInlinePressedStyles, remove, getParent, getOwner, setOwner, isOwnedBy, containsOrOwns, addFocusListener, removeFocusListener, addScrollListener, removeScrollListener, getSelectCommandText, setSelectCommandText, getLabelForComponent, setLabelForComponent, focusGained, focusLost, paintBackgrounds, paintShadows, getAbsoluteX, getAbsoluteY, isInClippingRegion, paintIntersectingComponentsAbove, paintScrollbars, paintScrollbarX, getScrollOpacity, getSelectedRect, paintScrollbarY, paintComponent, paintComponent, getBorder, getScrollable, paintBackground, isScrollable, getScrollX, setScrollX, getScrollY, setScrollY, onScrollX, onScrollY, getDraggedx, getDraggedy, contains, visibleBoundsContains, hasFixedPreferredSize, getBounds, getBounds, getVisibleBounds, getVisibleBounds, isFocusable, setFocusable, onSetFocusable, resetFocusable, getTabIndex, setTabIndex, getPreferredTabIndex, setPreferredTabIndex, isTraversable, setTraversable, handlesInput, setHandlesInput, consumesRawTextInput, hasFocus, setFocus, getComponentForm, getTopLevelContainer, repaint, repaint, longKeyPress, keyRepeated, registerForAnimation, deregisterFromAnimation, getAnimationManager, getScrollAnimationSpeed, setScrollAnimationSpeed, isBlockLead, setBlockLead, isIgnorePointerEvents, setIgnorePointerEvents, isRippleEffect, setRippleEffect, getInlineStylesTheme, setInlineStylesTheme, shouldRenderComponentSelection, isHideInLandscape, setHideInLandscape, createStyleAnimation, isSmoothScrolling, setSmoothScrolling, pointerHover, stopScrollMomentum, pointerHoverReleased, pointerHoverPressed, pinch, pinchReleased, pinch, rotation, isPinchBlocksDragAndDrop, setPinchBlocksDragAndDrop, pointerDragged, getDragImage, getDragTransparency, setDragTransparency, toImage, drawDraggedImage, draggingOver, dragEnter, dragExit, addPullToRefresh, setPullToRefresh, respondsToPointerEvents, pointerDragged, isStickyDrag, pointerPressed, isDragAndDropOperation, pointerReleased, longPointerPress, pointerReleased, setVerticalScrollBounds, setHorizontalScrollBounds, isVScrollThumbGrabbed, isHScrollThumbGrabbed, isVScrollThumbHover, isHScrollThumbHover, isTensileDragEnabled, setTensileDragEnabled, getTextSelectionSupport, addDropListener, removeDropListener, addDragOverListener, removeDragOverListener, isNativeDragSource, setNativeDragSource, getNativeDragOperation, setNativeDragOperation, createNativeDragOperation, isNativeDropTarget, setNativeDropTarget, getAcceptedDropMimeTypes, setAcceptedDropMimeTypes, getAcceptedDropActions, setAcceptedDropActions, canAcceptNativeDrop, nativeDragEnter, nativeDragOver, nativeDragExit, nativeDrop, addNativeDropListener, removeNativeDropListener, addNativeDragOverListener, removeNativeDragOverListener, dragFinished, addDragFinishedListener, addStateChangeListener, removeStateChangeListener, addPointerPressedListener, addLongPressListener, addContextMenuListener, removeContextMenuListener, addMouseWheelListener, removeMouseWheelListener, addStylusListener, removeStylusListener, mouseWheel, paintRippleOverlay, removePointerPressedListener, removeLongPressListener, removeDragFinishedListener, addPointerReleasedListener, removePointerReleasedListener, addPointerDraggedListener, removePointerDraggedListener, getDragSpeed, getStyle, getPressedStyle, setPressedStyle, initUnselectedStyle, initPressedStyle, initDisabledStyle, initSelectedStyle, getUnselectedStyle, setUnselectedStyle, getSelectedStyle, setSelectedStyle, getDisabledStyle, setDisabledStyle, installDefaultPainter, requestFocus, toString, refreshTheme, refreshTheme, isDragActivated, animate, scrollRectToVisible, scrollRectToVisible, paintBorder, paintBorderBackground, isCellRenderer, isScrollVisible, setScrollVisible, setIsScrollVisible, startEditingAsync, stopEditing, isEditing, isEditable, laidOut, deinitialize, isInitialized, setInitialized, styleChanged, getNextFocusDown, setNextFocusDown, getNextFocusUp, setNextFocusUp, getNextFocusLeft, setNextFocusLeft, getNextFocusRight, setNextFocusRight, getName, setName, initCustomStyle, deinitializeCustomStyle, isRTL, setRTL, isTactileTouch, isTactileTouch, setTactileTouch, getPropertyNames, getPropertyTypes, getPropertyTypeNames, getPropertyValue, setPropertyValue, paintLockRelease, paintLock, isSnapToGrid, setSnapToGrid, shouldBlockSideSwipe, shouldBlockSideSwipeLeft, shouldBlockSideSwipeRight, blocksSideSwipe, isFlatten, setFlatten, getTensileLength, setTensileLength, isGrabsPointerEvents, setGrabsPointerEvents, getScrollOpacityChangeSpeed, setScrollOpacityChangeSpeed, growShrink, isAlwaysTensile, setAlwaysTensile, isDraggable, setDraggable, isDropTarget, setDropTarget, isChildOf, isHideInPortrait, setHideInPortrait, getBindablePropertyNames, getBindablePropertyTypes, bindProperty, unbindProperty, getBoundPropertyValue, setBoundPropertyValue, getCloudBoundProperty, setCloudBoundProperty, getCloudDestinationProperty, setCloudDestinationProperty, getComponentState, setComponentState, setHidden, isHidden, setHidden, isHidden, announceForAccessibility, getAccessibilityText, setAccessibilityText, getSemantics, getAccessibilityNode, accessibilityChanged, accessibilityChanged, getTooltip, setTooltip
Constructor details
InfiniteContainer
public InfiniteContainer()InfiniteContainer
public InfiniteContainer(int amount)Parameters
amountint- the number of items to fetch in each call to fetchComponents
Method details
initComponent
protected void initComponent()refresh
public void refresh()continueFetching
public void continueFetching()isAsync
protected boolean isAsync()int) should be invoked asynchronously off the EDTReturns
fetchComponents
public abstract Component[] fetchComponents(int index, int amount)This is an abstract method that should be implemented by the sub classes to fetch the data.
When #isAsync() is overriden to return true this method is invoked on a background thread.
Notice that in this case the method might cause EDT violations warnings, since the
subclasses will need to create the Components off the EDT. While these are EDT violations they
probably won’t cause problems for more code.
Sub classes should preform their networking/data fetching here.
Parameters
indexint- the index from which to bring data
amountint- the size of components to bring
Returns
getInfiniteProgress
public InfiniteProgress getInfiniteProgress()