I want to show some statistics and links at a welcome/home tab. How can I pin a tab or protect from closing?
It is a good solution or should I use the mainwindow for the "dashboard"?
You can override the preClose() method of the AbstractWindow class. If this method always returns false, then you window will never be closed.
#Override
protected boolean preClose(String actionId) {
return false;
}
Related
How to do away the "X" at the editor window of a RCP-eclipse-plugin and avoid that the user can close the editor programmatically?
Would it be possible and if so how?
For an Eclipse e4 application you can just uncheck the 'closeable' option in the part design.
For a 3.x compatibility mode RCP you can't use the closeable option. One way to make the part uncloseable would be to use a custom renderer to override the part stack renderer org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer and override the isCloseable method:
public class MyStackRenderer extends StackRenderer
{
#Override
protected boolean isClosable(final MPart part)
{
if (part.getObject() instanceof MyEditor) {
return false;
}
return super.isClosable(part);
}
}
where MyEditor is your editor class.
This require Eclipse 4 but can be used with 3.x compatibility mode RCPs.
I am working on disabling copy/paste option menus on xamarin forms Entry, I am able to disable copy option using IsPassword=true attribute but this attribute also converts the normal input field to password field, which is not a requirement.
<Entry IsPassword="true" Placeholder="Password" TextColor="Green" BackgroundColor="#2c3e50" />
Thanks in advance.
This has to do with how Forms functions. Using iOS as the example here, the CanPerform override referred to in the other answer's Bugzilla issue is using the UIMenuController as the withSender and not the UITextField itself that might otherwise be expected. This is because the EntryRenderer class is a ViewRenderer<TView, TNativeView> type and subsequently is using whatever TNativeView (in this case, the UITextView) has in its CanPerform. Because nothing is going to be overridden by default, one still sees all of the cut/copy/paste options in the UIMenuController.
As a result, there would be a couple options. You could first make the modification where if you don't want copy/paste but are fine with getting rid of everything else, you can use UIMenuController.SharedMenuController.SetMenuVisible(false, false) in a custom renderer inheriting from EntryRenderer. If you look around on SO, there are similar questions where this is a possible route.
Alternatively, you can create a "true" custom renderer inheriting from ViewRenderer<TView, TNativeView> as ViewRenderer<Entry, YourNoCopyPasteUITextFieldClassName>. The class inheriting from UITextField can then override CanPerform as something like follows:
public override bool CanPerform(Selector action, NSObject withSender)
{
if(action.Name == "paste:" || action.Name == "copy:" || action.Name == "cut:")
return false;
return base.CanPerform(action, withSender);
}
This will require more effort because the custom renderer will not have the same behavior as the EntryRenderer, but as Xamarin.Forms is now open source, you could look to it for some ideas as to how the EntryRenderer functions normally. Something similar would likely have to be done for Android.
Edit: For Android, you can probably use this SO answer as a starting point: How to disable copy/paste from/to EditText
Another custom renderer, this time inheriting from ViewRenderer<Entry, EditText>, and create a class inside of it like this (in the most basic form):
class Callback : Java.Lang.Object, ActionMode.ICallback
{
public bool OnActionItemClicked(ActionMode mode, IMenuItem item)
{
return false;
}
public bool OnCreateActionMode(ActionMode mode, IMenu menu)
{
return false;
}
public void OnDestroyActionMode(ActionMode mode)
{
}
public bool OnPrepareActionMode(ActionMode mode, IMenu menu)
{
return false;
}
}
Then, in your OnElementChanged method, you can set the native control and the CustomSelectionActionModeCallback value:
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged(e);
if (Control != null)
{
Control.CustomSelectionActionModeCallback = new Callback();
}
}
Doing something like the following appears to disable all of the copy/paste/cut functionality on the custom entry as far as the toolbar goes. However, you can still long click to show the paste button, to which I've poked around a bit hadn't found an answer yet beyond setting LongClickable to false. If I do find anything else in that regard, I'd make sure to update this.
I'm building a Windows Phone app (8.1 using WinRT) using MvvmCross. To navigate to a new view I using ShowViewModel(). But when I hit the back button on the phone the app is closing instead of navigating back to the first view. How can I do it I want to return to the first view when I hitting the back button?
I solved it to use a interface in my viewmodel with a backbutton event, then I wrote a client speific implementation of it. In the viewmodel I handle the event and called the close method in the my base class MvxViewModel. Read more about my solution on my blog, http://danielhindrikes.se/windows-phone/handle-windows-phone-back-button-pressed-when-using-mvvm/
Here's a simpler solution. Create a base type for all your WP pages that derives from MvxWindowsPage. Then, handle the back key there and route the proper information to your VM:
public abstract class MyBaseView : MvxWindowsPage {
public MyBaseView() {
this.InitializeComponent();
HardwareButtons.BackPressed += HardwareButtons_BackPressed;
}
void HardwareButtons_BackPressed(object sender, BackPressedEventArgs e) {
if (Frame.CanGoBack) {
var vm = ViewModel as MyBaseViewModel;
if (vm != null) {
e.Handled = true;
vm.GoBackCommand.Execute(null);
}
}
}
}
Now, you also have to make sure that you have a base viewmodel which derives from MvxViewModel and from which you derive all your VMs. That base VM should have a GoBackCommand observable property, and executing that command should do a simple Close(this).
To see what's going on under the hood, see this related question: Windows Phone 8.1 Universal App terminates on navigating back from second page?
EDIT
Fixed declaration.
I have a custom launch configuration. It currently has a JavaArgumentsTab() where I can enter things for VM arguments and Program arguments. But how do I actually get any values entered there?
Ideally I would get them inside my LaunchConfigurationDelegate's launch() method. I expected to find any text entered as arguments inside the LaunchConfiguration or other parameters to that method, and I'm sure this is a newbie question, but I really haven't found anything promising.
TabGroup:
public class LaunchConfigurationTabGroup extends AbstractLaunchConfigurationTabGroup {
#Override
public void createTabs(ILaunchConfigurationDialog dialog, String mode) {
ILaunchConfigurationTab[] tabs = new ILaunchConfigurationTab[] {
new JavaArgumentsTab(),
new CommonTab()
};
setTabs(tabs);
} }
LaunchConfigurationDelegate:
public class LaunchConfigurationDelegate implements ILaunchConfigurationDelegate {
#Override
public void launch(ILaunchConfiguration configuration, String mode,
ILaunch launch, IProgressMonitor monitor) throws CoreException {
// How to get anything entered on my Java tab here...?
} }
Everything from the tabs should already have been set as attribute values in the ILaunchConfiguration when launch is called.
The settings from JavaArgumentsTab are stored in the attributes using constants from IJavaLaunchConfigurationConstants.
I have a strange problem with an AlphaAnimation. It is supposed to run repeatedly when an AsyncTask handler is called.
However, the first time the handler is called in the Activity, the animation won't start unless I touch the screen or if the UI is updated (by pressing the phone's menu button for example).
The strange part is that once the animation has run at least once, it will start without problem if the handler is called again.
Here's what the code looks like:
// AsyncTask handler
public void onNetworkEvent()
{
this.runOnUiThread(new Runnable() {
#Override
public void run()
{
flashScreen(Animation.INFINITE);
}
});
}
// Called method
private void flashScreen(int repeatCount)
{
final View flashView = this.findViewById(R.id.mainMenuFlashView);
AlphaAnimation alphaAnimation = new AlphaAnimation(1, 0);
alphaAnimation.setRepeatCount(repeatCount);
alphaAnimation.setRepeatMode(Animation.RESTART);
alphaAnimation.setDuration(300);
alphaAnimation.setInterpolator(new DecelerateInterpolator());
alphaAnimation.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation)
{
flashView.setVisibility(View.VISIBLE);
}
#Override
public void onAnimationEnd(Animation animation)
{
flashView.setVisibility(View.GONE);
}
#Override
public void onAnimationRepeat(Animation animation) { }
});
flashView.startAnimation(alphaAnimation);
}
I have noticed that runOnUIThread isn't necessary (same results occur if I don't use it), but I prefer keeping it as I'm not on the UI thread.
Any ideas on what could cause this?
A little more research showed that my problem was the same a this question:
Layout animation not working on first run
The flashView's visibility was set to GONE by default (causing the Animation not to start immediately as the View had never been rendered), so I just need to set it to INVISIBLE before calling flashView.startAnimation()
If setting the View to VISIBLE won't work, as was in my case, it helped for me to call requestLayout() before starting the Animation, like so:
Animation an = new Animation() {
...
view.requestLayout();
view.startAnimation(an);
In my case, my View was 0dip high which prevented onAnimationStart from being called, this helped me around that problem.
This worked for me:
view.setVisibility(View.VISIBLE);
view.startAnimation(animation);
I had to set the view to VISIBLE (not INVISIBLE, neither GONE), causing the view renderization needed to animate it.
That's not an easy one. Till you got a real answer : The animation start is triggered by onNetworkEvent. As we don't know the rest of the code, you should look there, try to change onNetworkEvent by an other event that you can easily identify, just to debug if the rest of the code is ok or if it's just the trigger that is responsible for it.
May be it will help someone, because previous answers not helped me.
My animation was changing height of view (from 0 to it's real height and back) on click - expand and collapse animations.
Nothing worked until i added listener and set visibility to GONE, when animation ends:
collapseAnim.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
view.setVisibility(View.GONE);
}
#Override
public void onAnimationRepeat(Animation animation) {
}
});
And when expand just set it to VISIBLE before animation:
view.setVisibility(View.VISIBLE);
view.startAnimation(expandAnim);