I am using JFace TreeViewer in order to list some data in a tree structure. I am using multiple diffirent root for editor and i change the tree viewer's input via an editor. How can I set the new root in inputChanged method within the content provider class?
#Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
this._viewer = (TreeViewer) viewer;
/* Register Listeners if Input is available */
if (newInput != null && oldInput == null) {
}
/* If new Input is NULL, unregister Listeners */
else if (newInput == null && oldInput != null) {
}
More specifically how can I listen to changes in my editor page?
Related
I'm dev an app that use a recycler view to show items composed by an image and a text. The user can add an item with a custom image, doing this in a normal activity it's easy:
Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
launcher.launch(intent);
private final ActivityResultLauncher<Intent> launcher = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
result -> {
if (result.getResultCode() == Activity.RESULT_OK
&& result.getData() != null) {
Uri photoUri = result.getData().getData();
image_to_up = photoUri;
image_uploaded = true;
element_image_add.setImageURI(photoUri);
}
}
);
But if I want let the user edit a recycler view item image, then the same code wont work inside the custom adapter, I get:
Cannot resolve method 'registerForActivityResult' in Adapter
So, how can I do it? How can I let the user open the gallery and select an image inside a custom adapter class?
Define this in your Activity class:
private final ActivityResultLauncher<Intent> launcher = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
result -> {
if (result.getResultCode() == Activity.RESULT_OK
&& result.getData() != null) {
Uri photoUri = result.getData().getData();
image_to_up = photoUri;
image_uploaded = true;
element_image_add.setImageURI(photoUri);
}
}
);
and then create a function in the activity class that call this launcher, then call this function from the adapter class:
public void launch_func() {
Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
launcher.launch(intent);
}
Basically you can't call the method inside the adapter so you call it from your activity class, it's not the prettiest but it should works.
You need an activity reference to use the registerForActivityResult method inside the Adapter.
Pass the Activity variable using the constructor of the Adapter and use it like this:
ActivityResultLauncher<Intent> launcher = ((YourActivityClass) activity).registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
result -> {
if (result.getResultCode() == Activity.RESULT_OK
&& result.getData() != null) {
//your logic
}
});
I'd like to reproduce the behavior of the Java browsing perspective as so : the user select a file (selectedFile) from a Custom Common Navigator View (VariabilityNavigator) and it displays only the related files to that selection in another Custom Common Navigator View (ConfigFileNavigator). It refreshes automatically as the selection goes.
I use Common navigator because I want to display the package of the related files and not the other ones or the empty ones. That I coded fine.
Could you please walk me thru the steps to do that ? Here is how far I got..
I have successfully coded the first view VariabilityNavigator.
I thought I would use a filter ConfigurationFilesFilter to get the selectedFile and use it to filter the related files.
I can get the selection from the VariabilityNavigator within the select(...) of ConfigurationFilesFilter code below
I then use it to filter the files I want to display using isRelatedToSelection. I haven't write that part yet, but it's not a problem for testing.
This method don't work for several reasons : it doesn't refresh and I have to click on the ConfigFileNavigator to get the result. What it should do : when I click on the first view and it should automatically display the result in the second view. Thanks for your help.
public class ConfigurationFilesFilter extends ViewerFilter {
String selectedFile;
public ConfigurationFilesFilter() {
}
#Override
public boolean select(Viewer viewer, Object parent, Object element) {
selectedFile = getVariabilityNavigatorSelection();
if (isChildElement(element)) {
return handleChild(element);
} else {
// manipulate tree viewer based on select decision for the sub elements
StructuredViewer sviewer = (StructuredViewer) viewer;
ITreeContentProvider provider = (ITreeContentProvider) sviewer.getContentProvider();
for (Object child : provider.getChildren(element)) {
if (select(viewer, element, child)) {
return true;
}
}
return false;
}
}
/**
*
* #param element
* #return true to be displayed
*/
private boolean handleChild(Object element) {
return true;
}
/**
* Check if an element is a java file and if it is related to the selection
*
* #param element
* #return boolean
*/
private boolean isChildElement(Object element) {
if (element instanceof IFile) {
if (((IFile) element).getFileExtension().equals("java")) {
return (isRelatedToSelection((IFile) element));
}
return false;
}
return false;
}
public String getVariabilityNavigatorSelection() {
IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
IViewPart viewPart = page.findView(VariabilityNavigator.ID);
String VariabilityNavigatorSelection = "" ;
if (viewPart == null) {
VariabilityNavigatorSelection = "open Variability view. \r\nTo do so, open the menu as followed:\r\nWindow > Show view > Other... > SPL > Variability Navigator";
} else {
ISelectionProvider selProvider = viewPart.getSite().getSelectionProvider();
IStructuredSelection sel = (IStructuredSelection) selProvider.getSelection();
if (sel.isEmpty()) {
VariabilityNavigatorSelection = "selection vide";
}
Iterator<?> i = sel.iterator();
while (i.hasNext()) {
final Object o = i.next();
if (o instanceof IFile) {
VariabilityNavigatorSelection = ((IFile) o).getName();
} else
VariabilityNavigatorSelection = "Please select a file";
}
}
if (!VariabilityNavigatorSelection.isEmpty())
printTrace("selectPrint = " + VariabilityNavigatorSelection);
return VariabilityNavigatorSelection;
}
Goal
I want to display the text that I put in the Label's "Error on ErrorProvider1" attribute whenever I get an error. See the following label's attributes below.
I try to display the text in the red rectangle into my ErrorProvider1 SetError(control, value) function.
If TextBox1.Text.Trim.Contains("'") Then
ErrorProvider1.SetError(lblErr, ErrorProvider1.GetError(lblErr))
Else
ErrorProvider1.SetError(lblErr, "")
End If
How can I retrieve the 'Error on ErrorProvider1' text from the lblErr to display it in the ErrorProvider1 SetError value?
The ErrorProvider component is very awkward to use effectively. It is fixable however, I'll give an example in C# that extends the component with some new capabilities:
ShowError(Control ctl, bool enable) displays the text that you entered at design-time when the enable argument is true. The easier-to-use version of SetError().
HasErrors returns true if the any active warning icons are displayed. Handy in your OK button's Click event handler.
FocusError() sets the focus to the first control that has a warning icon, if any. It returns false if no warnings are remaining.
SetError() is a replacement of ErrorProvider.SetError(). You only need it if you add any controls after the form's Load event fired or if you need to modify the warning text.
Add a new class to your project and paste the code shown below. Compile. Drop it from the top of the toolbox onto the form. The design-time behavior is identical. Modestly tested.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Forms;
using System.ComponentModel.Design;
class MyErrorProvider : ErrorProvider {
public void ShowError(Control ctl, bool enable) {
// Easy to use version of SetError(), uses design-time text
if (!enable) base.SetError(ctl, "");
else {
if (errors.ContainsKey(ctl)) base.SetError(ctl, errors[ctl]);
else base.SetError(ctl, "No error text available");
}
}
public bool HasErrors {
// True if any errors are present
get {
foreach (var err in errors)
if (!string.IsNullOrEmpty(base.GetError(err.Key))) return true;
return false;
}
}
public bool FocusError() {
// Set the focus to the first control with an active error
foreach (var err in errors) {
if (!string.IsNullOrEmpty(base.GetError(err.Key))) {
err.Key.Focus();
return true;
}
}
return false;
}
public new void SetError(Control ctl, string text) {
// Use this only to add/modify error text after the form's Load event
if (!string.IsNullOrEmpty(text)) {
if (errors.ContainsKey(ctl)) errors[ctl] = text;
else errors.Add(ctl, text);
}
base.SetError(ctl, text);
}
private void initialize(object sender, EventArgs e) {
// Preserve error text
copyErrors(((Form)sender).Controls);
}
private void copyErrors(Control.ControlCollection ctls) {
foreach (Control ctl in ctls) {
var text = this.GetError(ctl);
if (!string.IsNullOrEmpty(text)) {
errors.Add(ctl, text);
base.SetError(ctl, "");
}
copyErrors(ctl.Controls);
}
}
private Dictionary<Control, string> errors = new Dictionary<Control, string>();
// Plumbing to hook the form's Load event
[Browsable(false)]
public new ContainerControl ContainerControl {
get { return base.ContainerControl; }
set {
if (base.ContainerControl == null) {
var form = value.FindForm();
if (form != null) form.Load += initialize;
}
base.ContainerControl = value;
}
}
public override ISite Site {
set {
// Runs at design time, ensures designer initializes ContainerControl
base.Site = value;
if (value == null) return;
IDesignerHost service = value.GetService(typeof(IDesignerHost)) as IDesignerHost;
if (service == null) return;
IComponent rootComponent = service.RootComponent;
this.ContainerControl = rootComponent as ContainerControl;
}
}
}
Your issue is that you are replacing the error message when nothing is wrong. As noted in your comment below, you are storing the localized error message in the label's Tag, so you can do the following:
If TextBox1.Text.Trim.Contains("'") Then
ErrorProvider1.SetError(lblErr, lblErr.Tag)
Else
ErrorProvider1.SetError(lblErr, "")
End If
You were correct to use ErrorProvider1.GetError(Control) to get the value. It's just that you're more than likely replacing it with an empty string before you were retrieving it.
In XAML and WinRT, Is there a way to set up a textbox so that it is disabled for text input until it is tapped.
I tried setting up the Tapped event and then setting the IsEnabled=true, but that only seems to work if the IsEnabled=true in the first place.
I found this on MSDN:
http://social.msdn.microsoft.com/Forums/en-US/winappswithcsharp/thread/708c0949-8b06-40ec-85fd-201139ca8b2d
Talks about adding the TappedEvent manually to the event handled for each TextBox, which is cumbersome, but also doesn't seem to work unless IsEnabled was already set to true.
Basically, I want a form where all textboxes display data but are disabled unless the user taps to enable the box and then type.
You can use IsReadOnly instead of IsEnabled to achieve what you are looking for. In addition, you can set up the tapped event handlers in code easily. I'm not sure if setting up handlers in code is a requirement for this to work, as you noted above; however, it does simplify things.
Here are the details.
In the constructor of your page class (here it is MainPage), call the setup function:
public MainPage()
{
this.InitializeComponent();
// call the setup for the textboxes
SetupTextBoxes();
}
Here is where we do the magic - make all textboxes on this page readonly and set up tap handler:
private void SetupTextBoxes()
{
var tbs = GetVisualChildren<TextBox>(this, true);
foreach (var tb in tbs)
{
tb.IsReadOnly = true;
tb.AddHandler(TappedEvent, new TappedEventHandler(tb_Tapped), true);
}
}
Utility function to get a list of all children of the given type (T) of the passed in parent.
private List<T> GetVisualChildren<T>(DependencyObject parent, bool recurse = true)
where T : DependencyObject
{
var children = new List<T>();
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
DependencyObject v = (DependencyObject)VisualTreeHelper.GetChild(parent, i);
var child = v as T;
if (child == null && recurse)
{
var myChildren = GetVisualChildren<T>(v, recurse);
children.AddRange(myChildren);
}
if (child != null)
children.Add(child);
}
return children;
}
Finally, the event handler. This enables each textbox when tapped.
private void tb_Tapped(object sender, TappedRoutedEventArgs e)
{
((TextBox)(sender)).IsReadOnly = false;
}
I have a custom sitecore button which changes the template of the current item, simple enough.
However as part of this I'm trying to also migrate the renderings of the old layout to a new layout if it's of a certain sublayout type by ItemId. However the ItemId that is returned is always null, the only value I get back from the RenderingDefinition is the UniqueId.
What am I doing wrong?
I have used this blog post as a guide.
The Code
public class ConvertToNewTemplateCommand : Command
{
protected void Run(ClientPipelineArgs args)
{
if (!SheerResponse.CheckModified())
return;
Item item = Context.ContentDatabase.Items[args.Parameters["id"]];
if (args.IsPostBack)
{
if (args.Result == "yes")
{
//Get current layout details
var originalLayoutXml = item[FieldIDs.LayoutField];
//Get new template
TemplateItem hubTemplate = Context.ContentDatabase.GetTemplate("some guid...");
//Change template
item.ChangeTemplate(hubTemplate);
//Reset laytout
ResetLayout(item);
//Get reset layout
var newLayoutXml = item[FieldIDs.LayoutField];
//Add all the module containers to the new layout in the central column
MoveModuleContainers(item, originalLayoutXml, newLayoutXml);
}
}
}
private void MoveModuleContainers(Item item, string oldXml, string newXml)
{
var oldLayout = LayoutDefinition.Parse(oldXml);
var newLayout = LayoutDefinition.Parse(newXml);
bool updated = false;
var oldRenderings = (oldLayout.Devices[0] as DeviceDefinition).Renderings;
var newRenderings = (newLayout.Devices[0] as DeviceDefinition).Renderings;
foreach (RenderingDefinition rendering in oldRenderings)
{
// Here is where the rendering.ItemID is always null
if (rendering != null && !String.IsNullOrEmpty(rendering.ItemID) && new Guid(rendering.ItemID) == new Guid("matching guid..."))
{
rendering.Placeholder = "middlecolumn";
newRenderings.Add(rendering);
updated = true;
}
}
if (updated)
{
// Save item...
}
}
}
I got onto Sitecore support in the end which informed me that I should use:
Sitecore.Data.Fields.LayoutField.GetFieldValue(item.Fields[Sitecore.FieldIDs.LayoutField])
instead of:
item[FieldIDs.LayoutField]
to get the items layoutField correctly. This results in the rendering values being parsed correctly and as they say the rest is history.