I'm trying to change alpha value of a HUD, but it is not changing. I've tried with AlphaModifier and changing with method .setAlpha(), but with no result. As i can see, a HUD entity does not have setBlendingFunction() method.
This is what i am now trying to do:
this.mHud = new HUD() {
#Override
protected void onManagedUpdate(float pSecondsElapsed) {
super.onManagedUpdate(pSecondsElapsed);
if(flag) {
while (this.getAlpha() > 0) {
this.set(this.getAlpha() - (pSecondsElapsed / 1.5f));
}
} else {
while (this.getAlpha() < 1) {
this.setAlpha(this.getAlpha() + (pSecondsElapsed / 1.5f));
}
}
}
};
The "flag" variable is initialized to false, and it is changed when a button is pressed.
I have tried this too:
private static final IEntitiyModifier mToTransparentModifier = new AlphaModifier(1, 1, 0);
private static final IEntitiyModifier mToOpaqueModifier = new AlphaModifier(1, 0, 1);
this.mToTransparentModifier.setAutoUnregisterWhenFinished(true);
this.mToOpaqueModifier.setAutoUnregisterWhenFinished(true);
if(flag) {
this.mHud.registerEntityModifier(this.mToTransparentModifier);
}else {
this.mHud.registerEntityModifier(this.mToOpaqueModifier);
}
Any help would be appreciated. Thanks
Related
I know how to create a custom renderer to customize the actual text of the Xamarin forms picker, but how do you customize, say, the background color or text of the list that pops up when you click on the picker text box?
You can refer to the following code :
in iOS
using System;
using Xamarin.Forms;
using xxx;
using xxx.iOS;
using UIKit;
using Xamarin.Forms.Platform.iOS;
using Foundation;
[assembly:ExportRenderer(typeof(MyPicker), typeof(MyiOSPicker))]
namespace xxx.iOS
{
public class MyiOSPicker:PickerRenderer,IUIPickerViewDelegate
{
IElementController ElementController => Element as IElementController;
public MyiOSPicker()
{
}
[Export("pickerView:viewForRow:forComponent:reusingView:")]
public UIView GetView(UIPickerView pickerView, nint row, nint component, UIView view)
{
UILabel label = new UILabel
{
//here you can set the style of item!!!
TextColor = UIColor.Blue,
Text = Element.Items[(int)row].ToString(),
TextAlignment = UITextAlignment.Center,
};
return label;
}
protected override void OnElementChanged(ElementChangedEventArgs<Picker> e)
{
base.OnElementChanged(e);
if(Control!=null)
{
UIPickerView pickerView = (UIPickerView)Control.InputView;
pickerView.WeakDelegate = this;
pickerView.BackgroundColor = UIColor.Yellow; //set the background color of pickerview
}
}
}
}
in Android
using System;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
using xxx;
using xxx.Droid;
using Android.Widget;
using Android.App;
using System.Linq;
[assembly: ExportRenderer(typeof(MyPicker), typeof(MyAndroidPicker))]
namespace xxx.Droid
{
public class MyAndroidPicker:PickerRenderer
{
IElementController ElementController => Element as IElementController;
public MyAndroidPicker()
{
}
private AlertDialog _dialog;
protected override void OnElementChanged(ElementChangedEventArgs<Picker> e)
{
base.OnElementChanged(e);
if (e.NewElement == null || e.OldElement != null)
return;
Control.Click += Control_Click;
}
protected override void Dispose(bool disposing)
{
Control.Click -= Control_Click;
base.Dispose(disposing);
}
private void Control_Click(object sender, EventArgs e)
{
Picker model = Element;
var picker = new NumberPicker(Context);
if (model.Items != null && model.Items.Any())
{
// set style here
picker.MaxValue = model.Items.Count - 1;
picker.MinValue = 0;
picker.SetBackgroundColor(Android.Graphics.Color.Yellow);
picker.SetDisplayedValues(model.Items.ToArray());
picker.WrapSelectorWheel = false;
picker.Value = model.SelectedIndex;
}
var layout = new LinearLayout(Context) { Orientation = Orientation.Vertical };
layout.AddView(picker);
ElementController.SetValueFromRenderer(VisualElement.IsFocusedProperty, true);
var builder = new AlertDialog.Builder(Context);
builder.SetView(layout);
builder.SetTitle(model.Title ?? "");
builder.SetNegativeButton("Cancel ", (s, a) =>
{
ElementController.SetValueFromRenderer(VisualElement.IsFocusedProperty, false);
// It is possible for the Content of the Page to be changed when Focus is changed.
// In this case, we'll lose our Control.
Control?.ClearFocus();
_dialog = null;
});
builder.SetPositiveButton("Ok ", (s, a) =>
{
ElementController.SetValueFromRenderer(Picker.SelectedIndexProperty, picker.Value);
// It is possible for the Content of the Page to be changed on SelectedIndexChanged.
// In this case, the Element & Control will no longer exist.
if (Element != null)
{
if (model.Items.Count > 0 && Element.SelectedIndex >= 0)
Control.Text = model.Items[Element.SelectedIndex];
ElementController.SetValueFromRenderer(VisualElement.IsFocusedProperty, false);
// It is also possible for the Content of the Page to be changed when Focus is changed.
// In this case, we'll lose our Control.
Control?.ClearFocus();
}
_dialog = null;
});
_dialog = builder.Create();
_dialog.DismissEvent += (ssender, args) =>
{
ElementController?.SetValueFromRenderer(VisualElement.IsFocusedProperty, false);
};
_dialog.Show();
}
}
}
I'm trying to animate ListCell when they appear.
Specially I try to animate a new cell when it was just added to the list.
For now it's working pretty OK except when I scroll the ListView, then indexes get messed up and the wrong cell is animated.
I use a boolean flag (entering) in my item model to detect when a cell is used for a brand new item.
public class TimeListCell extends ListCell<MarkItem> {
private static final String BUTTON_GOTO_MARK_CLASS = "but-markgoto";
private static final String LABEL_TIME_MARK_CLASS = "track-time";
private static final String BUTTON_DELETE_MARK_CLASS = "but-markdel";
private static final String MARK_HIGHLIGHT_CURRENT_CLASS = "highlighted";
private Instant time;
private MarkItem markItem;
protected ListCellAnimation anim;
private HBox root = new HBox();
private Button go = new Button();
private Label track = new Label();;
private Button del = new Button();
private ChangeListener<? super Boolean> highlightChange = (e, o, n) -> { setHighlighted(n); };
public TimeListCell (Consumer<MarkItem> onGoto, Consumer<MarkItem> onDelete) {
root.setAlignment(Pos.CENTER);
go.getStyleClass().add(BUTTON_GOTO_MARK_CLASS);
go.setOnAction( e -> {
if (onGoto != null) {
// Trigger GOTO consumer function
onGoto.accept(markItem);
}
});
track.getStyleClass().add(LABEL_TIME_MARK_CLASS);
del.getStyleClass().add(BUTTON_DELETE_MARK_CLASS);
del.setOnAction( e -> {
// First trigger exit animation then delete item
this.animateExit(onDelete);
});
root.getChildren().add(go);
root.getChildren().add(track);
root.getChildren().add(del);
}
#Override
protected void updateItem (final MarkItem item, boolean empty) {
super.updateItem(item, empty);
if (markItem != null) {
markItem.highlightedProperty().removeListener(highlightChange);
}
if (!empty && item != null) {
markItem = item;
time = item.getTime();
track.setText(DateUtil.format(time, DateUtil.Pattern.TIME));
setGraphic(root);
item.highlightedProperty().addListener(highlightChange);
setHighlighted(item.isHighlighted());
if (anim == null) {
//Adding Animation to the ListCell
anim = new ListCellAnimation(this);
//KeyFrame[] f = getKeyFrames(types);
KeyFrame[] frames = null;
if (anim.getKeyFrames().size() == 0) {
KeyFrame[] f = anim.getPopIn(frames);
if (f != null) {
anim.getKeyFrames().addAll(f);
}
}
}
if (item.isEntering()) {
//Checking when to play Animation
animateEnter();
item.setEntering(false);
}
} else {
setGraphic(null);
}
}
/**
* Set/unset cell highlighted style for display.
*
* #param highlighted
* Whether or not to highlight the cell
*/
public void setHighlighted (boolean highlighted) {
track.getStyleClass().remove(MARK_HIGHLIGHT_CURRENT_CLASS);
if (highlighted)
track.getStyleClass().add(MARK_HIGHLIGHT_CURRENT_CLASS);
}
/**
* Animate entering cell.
*/
private void animateEnter() {
if (anim != null && anim.getKeyFrames().size() >= 0
&& (anim.getTimeline().getStatus() == Timeline.Status.STOPPED
|| anim.getTimeline().getStatus() == Timeline.Status.PAUSED)) {
anim.getTimeline().playFromStart();
}
}
/**
* Animate exiting cell.
* Trigger DELETE consumer function when animation is complete.
*/
private void animateExit (Consumer<MarkItem> onDelete) {
anim.getReversedTimeline().setOnFinished( t -> {
// Remove item from list
if (onDelete != null) {
onDelete.accept(markItem);
}
// Prepare cell for next item to use it
scaleXProperty().set(1);
scaleYProperty().set(1);
});
anim.getReversedTimeline().playFromStart();
}
public Instant getTime () {
return time;
}
}
Has anyone any idea of what could mess up the cell indexing ?
Thanks.
If a cell which is animating is reused to display an item that is not "entering", then you need to stop the current animation:
if (item.isEntering()) {
//Checking when to play Animation
animateEnter();
item.setEntering(false);
} else {
anim.getTimeline().stop();
}
In general, you seem to be assuming that any given cell is only ever used for a single item, which is certainly not the case. There may be other bugs in your code that are consequences of this assumption, but this is the main one I can see.
I run into a problem where I need to enable my button in the ListView. The weird thing is :
public class CookingStepAdapter extends ArrayAdapter<CookingStep> {
...
private void addButtonToList(Button clock, Button skip){
if (list_clock_button == null) {
list_clock_button = new ArrayList<Button>();
iterate = 0;
}
if (list_skip_button == null)
list_skip_button = new ArrayList<Button>();
list_clock_button.add(clock);
list_skip_button.add(skip);
clock.setEnabled(true);
skip.setEnabled(true);
list_clock_button.get(0).setEnabled(true);
list_clock_button.get(0).setFocusable(true);
list_clock_button.get(0).setFocusableInTouchMode(true);
list_clock_button.get(0).invalidate();
list_skip_button.get(0).setEnabled(true);
list_skip_button.get(0).setFocusable(true);
list_skip_button.get(0).setFocusableInTouchMode(true);
list_skip_button.get(0).postInvalidate();
}
}
When I set enable with the list_clock_button.get(0), it's not working at all. But clock.setEnabled(true); actually worked.
But then I only want the first button of the ListView enabled, that makes the first option more fit in this situation. The second option works, but it made all the buttons enabled, that's not what I want. I did recheck the first button address, and it matched list_clock_button.get(0), why it's not working.
EDIT :
Here's my function getView :
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.cooking_steps_and_timer, parent, false);
final Button button = (Button) rowView.findViewById(R.id.button_timer);
final TextView timer = (TextView) rowView.findViewById(R.id.cooking_timer);
final Button skipButton = (Button) rowView.findViewById(R.id.button_skip);
TextView stepContent = (TextView) rowView.findViewById(R.id.cooking_step_content);
final CookingStep step = list.get(position);
String stepOrder = (String) context.getResources().getText(R.string.step_order) + " " + step.getOrder();
String content = "<b>" + stepOrder + ":</b>" + " " + step.getContent() + "\n";
stepContent.setText(Html.fromHtml(content));
if (step.getTimer() == null || step.getTimer() == 0){
timer.setVisibility(View.GONE);
button.setVisibility(View.GONE);
skipButton.setVisibility(View.GONE);
} else {
//myTimer = new CookingTimer(step.getTimer());
timer.setText(step.getMyTimer().toString());
step.setCountDown(new CountDownTimer(step.getTimer() * 60000, 1000) {
#Override
public void onTick(long millisUntilFinished) {
step.getMyTimer().tick();
timer.setText(step.getMyTimer().toString());
}
#Override
public void onFinish() {
nextButtonEnable();
}
});
button.setText(R.string.button_available);
skipButton.setText(R.string.skip_button_content);
addButtonToList(button, skipButton);
//button.setEnabled(true);
list_clock_button.get(0).setEnabled(true);
button.requestFocusFromTouch();
button.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
if (!button.isPressed()) {
button.setPressed(true);
button.setText(R.string.button_available);
step.getCountDown().start();
} else {
button.setPressed(false);
button.setText(R.string.button_pressed);
step.getCountDown().cancel();
}
}
return true;
}
});
skipButton.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
step.getCountDown().cancel();
nextButtonEnable();
}
return true;
}
});
}
return rowView;
}
The reason of all buttons getting enabled is you are setting all of them enable yourself. To set any particular button enable you have to check the id or the item position to set that particular button to enable.
Like this for example:-
if(clock.getID == R.id.some_id_in_xml){
clock.setEnabled(true);
}
But before that you have to check the position of the item to select the desired item in the list.
I develop extension of PDT plugin. I need dialog with interfaces only (not classes). Basic code looks like it:
OpenTypeSelectionDialog2 dialog = new OpenTypeSelectionDialog2(
DLTKUIPlugin.getActiveWorkbenchShell(),
multi,
PlatformUI.getWorkbench().getProgressService(),
null,
type,
PHPUILanguageToolkit.getInstance());
It's works fine but I get classes and interfaces together (type variables). Is any method to filter it? I can't find this kind of mechanism in PDT but classes and interfaces are recognize correctly (icons next to names).
I don't know if its the best solution but it works.
int falseFlags = 0;
int trueFlags = 0;
IDLTKSearchScope scope = SearchEngine.createSearchScope(getScriptFolder().getScriptProject());
trueFlags = PHPFlags.AccInterface;
OpenTypeSelectionDialog2 dialog = new OpenTypeSelectionDialog2(
DLTKUIPlugin.getActiveWorkbenchShell(),
multi,
PlatformUI.getWorkbench().getProgressService(),
scope,
IDLTKSearchConstants.TYPE,
new PHPTypeSelectionExtension(trueFlags, falseFlags),
PHPUILanguageToolkit.getInstance());
And PHPTypeSelectionExtension looks like this:
public class PHPTypeSelectionExtension extends TypeSelectionExtension {
/**
* #see PHPFlags
*/
private int trueFlags = 0;
private int falseFlags = 0;
public PHPTypeSelectionExtension() {
}
public PHPTypeSelectionExtension(int trueFlags, int falseFlags) {
super();
this.trueFlags = trueFlags;
this.falseFlags = falseFlags;
}
#Override
public ITypeInfoFilterExtension getFilterExtension() {
return new ITypeInfoFilterExtension() {
#Override
public boolean select(ITypeInfoRequestor typeInfoRequestor) {
if (falseFlags != 0 && (falseFlags & typeInfoRequestor.getModifiers()) != 0) {
// Try to filter by black list.
return false;
} else if (trueFlags == 0 || (trueFlags & typeInfoRequestor.getModifiers()) != 0) {
// Try to filter by white list, if trueFlags == 0 this is fine 'couse we pass black list.
return true;
} else {
// Rest is filter out.
return false;
}
}
};
}
#SuppressWarnings("restriction")
#Override
public ISelectionStatusValidator getSelectionValidator() {
return new TypedElementSelectionValidator(new Class[] {IType.class, INamespace.class}, false);
}
}
I'm capturing a right click event to show a context menu. What I haven't been able to figure out, is how to make the right click actually select the TreeItem, prior to showing of context menu.
All help is appreciated.
private Tree tree = new Tree() {
#Override
public void onBrowserEvent(Event event) {
if (event.getTypeInt() == Event.ONCONTEXTMENU) {
DOM.eventPreventDefault(event);
showContextMenu(event);
}
super.onBrowserEvent(event);
}
#Override
protected void setElement(Element elem) {
super.setElement(elem);
sinkEvents(Event.ONCONTEXTMENU);
}
};
ONMOUSEDOWN event gets fired before ONCONTEXTMENU. Have you tried to listen for onMouseDown events, and set the selected item? Something along these lines:
#Override
public void onBrowserEvent(Event event) {
switch (DOM.eventGetType(event)) {
case Event.ONMOUSEDOWN:
if (DOM.eventGetButton(event) == Event.BUTTON_RIGHT) {
TreeItem selectedItem = findSelectedItem(event);
if (selectedItem != null) {
selectedItem.setSelected(true);
}
} else {
super.onBrowserEvent(event);
}
break;
case Event.ONCONTEXTMENU:
showContextMenu(event);
break;
default:
super.onBrowserEvent(event);
break;
}
and findSelectedItem traverses the tree looking for the selected item:
TreeItem findSelectedItem(Event e) {
return findSelectedItemRecursive(event.getClientX(), event.getClientY());
}
TreeItem findSelectedTreeItemRecursive(TreeItem root, int x, int y) {
if (null == root) {
int count = getItemCount();
for (int i = 0; i < count; i++) {
TreeItem selected = findSelectedTreeItemRecursive(getItem(i), x, y);
if (selected != null) {
return selected;
}
}
return null;
}
int count = item.getChildCount();
for (int i = 0; i < count; i++) {
TreeItem selected = findSelectedTreeItem(item.getChild(i), x, y);
if (selected != null) {
return selected;
}
}
if (x >= item.getAbsoluteLeft()
&& x <= item.getAbsoluteLeft() + item.getOffsetWidth()
&& y >= item.getAbsoluteTop()
&& y <= item.getAbsoluteTop() + item.getOffsetHeight()) {
return item;
}
return null;
}
You can use dedicated overloaded TreeItem :
public class MyTreeItem extends TreeItem implements ContextMenuHandler {
public SBTreeItem(SBItemTree tree, String name) {
super();
Label w = new Label(name);
w.addDomHandler(this, ContextMenuEvent.getType());
setWidget(w);
}
public void onContextMenu(ContextMenuEvent event) {
Window.alert(getSBItem().getName());
event.getNativeEvent().stopPropagation();
}
}
I'd just like to add a couple of links leading to issues about this:
http://code.google.com/p/google-web-toolkit/issues/detail?id=4529&q=right%20click%20selection
http://code.google.com/p/google-web-toolkit/issues/detail?id=4604&q=right%20click%20selection
I know this is an old question, but hopefully here's an answer that will save time for the masses hitting this page from a Google search. IMO, the best way is to use Google's own internal tree searching code -- it's a solution that scales very well with the number of elements in the tree. I
am using GWT 2.5.1.
private void initTree() {
tree = new Tree() {
#Override
public void onBrowserEvent(Event event) {
/*
* If the event is a context menu event, we want the tree item
* to also be selected.
*
* This logic must occur before the call to the superclass
* method so the selection is updated before the context menu
* logic executes. This is useful when we want to make items in
* the context menu invisible/disabled based on the selection.
*/
if (DOM.eventGetType(event) == Event.ONCONTEXTMENU) {
if (getItemCount() > 0) {
// In my use case there is only 1 top-level tree item
TreeItem root = getItem(0);
// Taken from com.google.gwt.user.client.ui.Tree.elementClicked(Element):
ArrayList<Element> chain = new ArrayList<Element>();
collectElementChain(chain, getElement(), DOM.eventGetTarget(event));
TreeItem selection = findItemByChain(chain, 0, root);
/*
* For some reason SelectionEvent will only fire if
* selection is non-null; I am firing the selection
* event manually because I want to know when there has
* been a deselection of an item in the tree.
*/
if (selection != null) {
this.setSelectedItem(selection);
} else {
SelectionEvent.fire(this, null);
}
}
}
super.onBrowserEvent(event);
}
};
tree.setAnimationEnabled(true);
}
//// BEGIN code copied from com.google.gwt.user.client.ui.Tree:
/**
* Collects parents going up the element tree, terminated at the tree root.
*/
private void collectElementChain(ArrayList<Element> chain, Element hRoot,
Element hElem) {
if ((hElem == null) || (hElem == hRoot)) {
return;
}
collectElementChain(chain, hRoot, DOM.getParent(hElem));
chain.add(hElem);
}
private TreeItem findItemByChain(ArrayList<Element> chain, int idx,
TreeItem root) {
if (idx == chain.size()) {
return root;
}
Element hCurElem = chain.get(idx);
for (int i = 0, n = root.getChildCount(); i < n; ++i) {
TreeItem child = root.getChild(i);
if (child.getElement() == hCurElem) {
TreeItem retItem = findItemByChain(chain, idx + 1,
root.getChild(i));
if (retItem == null) {
return child;
}
return retItem;
}
}
return findItemByChain(chain, idx + 1, root);
}
//// END