I'm developing an application in javaFx and I'm using TabPane to organise content. My problem is that when I put a node as the content of a tab, and then set the background of that same node, the background color gets kind of blurry, as you can see in the image, the background color was defined in a css file.
If anyone knows how to resolve this, would really appreciate the help.
http://i.stack.imgur.com/h3gNH.png
I think you are a victim of this issue:
JavaFX Image (PNG) transparency crispness being lost when rendering
It will likely be fixed in a forthcoming (i.e. Java 8) release.
For now, you may be able to use the work-around documented in the linked question's answer.
To do this, place your image in a CenteredRegion and use that as the first element of a StackPane placed in your tab. Then layer the rest of the tab content over the image by adding the content to the StackPane. It's a bit awkward and there may be a more straight-forward solution for your particular case.
class CenteredRegion extends Region {
private Node content;
CenteredRegion(Node content) {
this.content = content;
getChildren().add(content);
}
#Override protected void layoutChildren() {
content.relocate(
Math.round(getWidth() / 2 - content.prefWidth(USE_PREF_SIZE) / 2),
Math.round(getHeight() / 2 - content.prefHeight(USE_PREF_SIZE) / 2)
);
}
public Node getContent() {
return content;
}
}
Related
I have registered an action in the EditorPopupMenu (this is right click menu). I also have a bunch of components inside a ToolWindow (that I designed using the GUI Designer plugin) that I want to update the values of.
There have been some posts on the IntelliJ forums about this, and the typical answer seems to advice using the ToolWindow's ContentManager, and obtain the JPanel containing all your components. E.g. the following:
Project p = e.getProject();
ToolWindow toolWindow;
toolWindow = ToolWindowManager.getInstance(p).getToolWindow("My ToolWindow ID");
ContentManager contentManager = toolWindow.getContentManager();
JPanel jp = (JPanel) contentManager.getContent(0).getComponent();
This feels counterintuitive... Having to navigate inside JPanel's to find a bunch of components. What if I decided to put my components inside a different container? Suddenly the way I navigate to my components would break down.
Is it really the most practical way to constrain myself to the way my GUI is built? Can't I access these components in a different way?
I found a way to access my custom myToolWindow. This should help quite some people.
Make sure that your custom MyToolWindow extends the class SimpleToolWindowPanel.
In your custom myToolWindowFactory class, pass your custom MyToolWindow to ContentFactory.createContent() as the first argument. NOT one of the JPanel's inside MyToolWindow as is done in the ToolWindow examples given in the official IntelliJ documentation...
In your MyToolWindow constructor, call the method setContent(<YourJPanelContainingYourComponents>).
I found the answer by experimenting on example 5 from this link:
public JBTabbedTerminalWidget getTerminalWidget(ToolWindow window) {
window.show(null);
if (myTerminalWidget == null) {
JComponent parentPanel = window.getContentManager().getContents()[0].getComponent();
if (parentPanel instanceof SimpleToolWindowPanel) {
SimpleToolWindowPanel panel = (SimpleToolWindowPanel) parentPanel;
JPanel jPanel = (JPanel) panel.getComponents()[0];
myTerminalWidget = (JBTabbedTerminalWidget) jPanel.getComponents()[0];
} else {
NotificationUtils.infoNotification("Wait for Freeline to initialize");
}
}
return myTerminalWidget;
}
So I noticed that an App I made will look messed up if the Font size in the users phone is changed to above medium, I googled a bit found many unanswered or answered but not to the point of the same question.
I want to be able to do that in the PCL class if possible , if not possible then the most interesting platform for me is android so a fix specific for android would do.
Here is a sample of my Xaml code so you can get a reference:
<Label Text="STORE" FontSize="23" HeightRequest="40" WidthRequest="212" VerticalTextAlignment="Center" HorizontalTextAlignment="Center"></Label>
So to be clear the question is how do I prevent the system from overriding my fontsize which is 23 in this case?
Thanks
SImply add this in your MainActivity after OnCreate.
#region Font size change Prevent
public override Resources Resources
{
get
{
var config = new Configuration();
config.SetToDefaults();
return CreateConfigurationContext(config).Resources;
}
}
#endregion Font size change Prevent
For those who still struggle how to disable accessibility font scaling on Android.
You need to create custom renderer for label, button and common input controls like this:
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
[assembly: ExportRenderer(typeof(Label), typeof(MyApp.Droid.Renderers.LabelRendererDroid))]
namespace MyApp.Droid.Renderers
{
class LabelRendererDroid : LabelRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
{
base.OnElementChanged(e);
if (e.NewElement == null) return;
Control.SetTextSize(Android.Util.ComplexUnitType.Dip, (float)e.NewElement.FontSize);
}
}
}
For Xamarin picker controls there is no FontSize property, so we can add it to App class:
public static double NormalFontSize => Device.GetNamedSize(NamedSize.Medium, typeof(Picker));
and then utilize it in picker renderer:
Control.SetTextSize(Android.Util.ComplexUnitType.Dip, (float)App.NormalFontSize);
Also by changing this NormalFontSize property we can set whatever desired font size for picker, as it is not available without renderer.
Have you seen the items in chapter 5 of this book?
https://developer.xamarin.com/guides/xamarin-forms/creating-mobile-apps-xamarin-forms/
Although not an exact answer, depending on what you are attempting to do you might be able to use the example at the end of the chapter modified to allow for a "Max" font size. All from within the PCL.
It's worth noting however that the inability to scale the font to a big size could be an indication of accessibility problem.
I thought this would be like pretty simple task to do, but now I have tried for hours and cant figure out how to get around this.
I have a list of friends which should be displayed in a scrollable list. Each friend have a profile image and a name associated to him, so each item in the list should display the image and the name.
The problem is that I cant figure out how to make a flexible container that contains both the image and the name label. I want to be able to change the width and height dynamically so that the image and the text will scale and move accordingly.
I am using Unity 5 and Unity UI.
I want to achieve the following for the container:
The width and height of the container should be flexible
The image is a child of the container and should be left aligned, the height should fill the container height and should keep its aspect ratio.
The name label is a child of the contianer and should be left aligned to the image with 15 px left padding. The width of the text should fill the rest of the space in the container.
Hope this is illustrated well in the following attached image:
I asked the same question here on Unity Answers, but no answers so far. Is it really possible that such a simple task is not doable in Unity UI without using code?
Thanks a lot for your time!
Looks like can be achieved with layout components.
The image is a child of the container and should be left aligned, the height should fill the container height and should keep its aspect ratio.
For this try to add Aspect Ratio Fitter Component with Aspect mode - Width Controls Height
The name label is a child of the container and should be left aligned to the image with 15 px left padding. The width of the text should fill the rest of the space in the container.
For this you can simply anchor and stretch your label to the container size and use BestFit option on the Text component
We never found a way to do this without code. I am very unsatisfied that such a simple task cannot be done in the current UI system.
We did create the following layout script that does the trick (tanks to Angry Ant for helping us out). The script is attached to the text label:
using UnityEngine;
using UnityEngine.EventSystems;
[RequireComponent (typeof (RectTransform))]
public class IndentByHeightFitter : UIBehaviour, UnityEngine.UI.ILayoutSelfController
{
public enum Edge
{
Left,
Right
}
[SerializeField] Edge m_Edge = Edge.Left;
[SerializeField] float border;
public virtual void SetLayoutHorizontal ()
{
UpdateRect ();
}
public virtual void SetLayoutVertical() {}
#if UNITY_EDITOR
protected override void OnValidate ()
{
UpdateRect ();
}
#endif
protected override void OnRectTransformDimensionsChange ()
{
UpdateRect ();
}
Vector2 GetParentSize ()
{
RectTransform parent = transform.parent as RectTransform;
return parent == null ? Vector2.zero : parent.rect.size;
}
RectTransform.Edge IndentEdgeToRectEdge (Edge edge)
{
return edge == Edge.Left ? RectTransform.Edge.Left : RectTransform.Edge.Right;
}
void UpdateRect ()
{
RectTransform rect = (RectTransform)transform;
Vector2 parentSize = GetParentSize ();
rect.SetInsetAndSizeFromParentEdge (IndentEdgeToRectEdge (m_Edge), parentSize.y + border, parentSize.x - parentSize.y);
}
}
In a Hub view App with subItems Pages, my question is when I navigate to a sub item detail Page and then use command navigate goback, the view always returns to pageroot hub section01.
How can I return the MainHub Page to the original calling section that went to the sub page in the first place?
My research has been fruitless. I don't think snaps are my answer but hey any advice is appreciated.
I apologize if this is a very simple question but...
Thx.
Ok. Thanks for the answers. After looking at this problem for three days I have found a solution but not quite an answer.
this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Enabled;
By enabling Navigation Caching the page will return to it's sender position. However I still desire to return to the Hub root page to a specific section. If anyone still has info on how to achieve this I would be grateful.
Seasons Greetings.
Well the newbie here has also discovered the MyHub.ScrollToSection(MyHub.Sections[0]);
This allows you to navigate directly to a section thereby bringing it into the current view.
I'm trying to find an answer to the same question. This is what I've found so far. I welcome any better solutions.
Option 1
Enable caching for the page. Note that this must be set in the page constructor or XAML. This will increase memory usage but will improve performance of your app when you navigate back to a cached page.
this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Enabled;
More information here: http://msdn.microsoft.com/en-us/library/windows/apps/xaml/windows.ui.xaml.controls.page.navigationcachemode.aspx
Option 2
Manually save a controls state between page navigations. The example below is using the NavigationHelper class which is added to a new Windows Store project by default.
private void OnNavigationHelperSaveState(obj sender, SaveStateEventArgs e)
{
e.PageState["SelectedSection"] = this.MainHub.SectionsInView;
}
private void OnNavigationHelperLoadState(obj sender, LoadStateEventArgs e)
{
if (e.PageState != null)
{
var sections = e.PageState["SelectedSection"] as IList<HubSection>;
if (sections != null && sections.Any())
{
this.MainHub.ScrollToSection(sections[0]);
}
}
}
More information here: http://msdn.microsoft.com/en-gb/library/windows/apps/hh986968.aspx
you could get the Hub's descendant scrollviewer and register to scrollchanged events, store the scrollOffsets and restore them as soon as the user navigates back to the page by applying the values to the hub's scrollviewer.
I guess you would have to register to the hub's loaded event to get the descending scrollviewer (you can use an Extension method from WinRt XAML Toolkit that allows you to get the descendants by Type (e.g. Scrollviewer)
greetings!
you can delete un back stack with this :
if(this.Frame.CanGoBack)
{
this.Frame.BackStack.RemoveAt(0);
}
Have you tried what i suggested?
Unforunately Hub can't be extended to do this and access it's Scrollviewer so you have to do this with an attached Property or plainly in your page.cs .
First you register an handler for the Loaded event of your hub. In the handler you get the descending scrollviewer (with the help of WINRT XAML Toolkit maybe) and register for it's ViewChanged Event.
You store the paremeters you like somewhere they don't get deleted on page navigation and restore and attach them to the scrollviewer on backwards-navigation.
I can give you example code in the afternoon.
Greetings
It's not a ridiculous request. Try this:
public static class Concurrency
{
public static HubSection GotoSection { get; set; }
}
public class MainPage : Page
{
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (Concurrency.GotoSection != null)
MainHub.ScrollToSection(Concurrency.GotoSection);
Concurrency.GotoSection = null;
base.OnNavigatedTo(e);
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
Concurrency.GotoSection = MainHub.SectionsInView.First();
base.OnNavigatedFrom(e);
}
}
The reason this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Enabled; may not be the correct solution is because you might want your hub to be refreshed. If the detail page resulted in an edit (or especially a delete) a back navigation would show stale data, and subject your app to un unexpected state if the user interacts with dead data.
Best of luck!
Enable cache mode on your page at initialization
public MainHubPage()
{
. .......
this.NavigationCacheMode = NavigationCacheMode.Enabled;
.......
}
You need to add Loaded method to Page constructor.
MainHub.Loaded += async (s, e) => await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
//here you can scroll
MainHub.ScrollToSection(Loyaltysection);
});
I need to develop a control which is similar to the Nested Grid in the Smart GWT.
User will be having a column for expansion images, when user clicking on the image in a particular row, a sub grid has to be opened there itself. Here all remaining rows needs to move down.
How can i achieve that functionality? Can anybody give me some clues so that i can proceed.
I have already a grid which is a celltable with custom header(with search functionality implemented).
Thanks,
Saritha.
Create your nested widget (myNestedWidget) that you want to show. It should have a CSS style "position: absolute", unless your grid is added to the LayoutPanel (or similar), in which case you can position your widget directly. Let's call the parent widget of your grid gridParentWidget.
In your CellTable add the following handler:
myTable.addCellPreviewHandler(new Handler<myObject>() {
#Override
public void onCellPreview(CellPreviewEvent<myObject> event) {
if ("click".equals(event.getNativeEvent().getType())) {
if (event.getColumn() == 0) {
int top = myTable.getRowElement(event.getIndex()).getAbsoluteBottom();
int left = myTable.getRowElement(event.getIndex()).getAbsoluteLeft();
myNestedWidget.getElement().getStyle().setTop(top, Unit.PX);
myNestedWidget.getElement().getStyle().setLeft(left, Unit.PX);
gridParentWidget.add(myNestedWidget);
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
#Override
public void execute() {
int height = myNestedWidget.getOffsetHeight();
myTable.getRowElement(event.getIndex()).getStyle().setHeight(height + "px");
]
});
}
}
});
}
This is obviously an outline of the solution. The details of the implementation may vary slightly depending on which widgets you use for your parent widget and your nested widget. If you change z-indexes somewhere, you have to take it into account too. You also need to make sure that your nested widget fits into the width of your grid, or you'll need to wrap it in a ScrollPanel and set a width to it explicitly.