I have several escenarios where some mgwt widgets which do not extend TouchWidget need to be "touchable", for instance ScrollPanel or FlexPanel.
One scenario is a full screen widget wich reacts when user touches it and shows a popup.
Java do not let extending two classes, so I want to reuse code from both the widget and the TouchWidget (which has a final static TouchWidgetImpl in it)
Thanks
You don't need to make a FlexPanel into a TouchWidget. You can add a TouchWidget to a FlexPanel, and let it occupy the entire screen.
Related
i am new to GWT and GWTP and the question sounds stupid.. Can I make an abstract PresenterWidget or similiar?
Like in normal Java extending the "class" and reuse / extend the logic. But not only the class, the whole thing of View and Presenter. I try to explain my initial situation and maybe you have another idea.
The image hopefully helps to explain it. The "Main-Tab" and every other tab consists of a collection of views which have the same base structure and the same logic.
the base structure consists of
border around EVERYTHING
an image (the wwitch)
a title
a textarea
a PresenterWidget which is added to a contentSlot of the parent (the menu left)
and below the base are view specific components like buttons, text or any other widget. So a main part of the view with logic is repeading. If the switch is "toggled" the view is hidden (the textarea and any childs / view specific components) like the lowest view in the picture. Furthermore the PresenterWidget left changes the color.
The logic is working, but now I am searching a proper way to solve this without repeading code and the possibility to add child elements which are hidden as well by toggling the switch. Can I add to a PresenterWidget child widgets and define where there should be added? like: Even if this is possible, it feels a bit inconvenient.
Thanks in advance.
I just want to post the solution:
I have now a simple Composite (KPICommonView) for the switch, title and the description. It got another FlowPanel below the description, where the specific components will be added later. For this the Composite implements "HasWidgets" and overrides the "add(Widget w)"-method which is called by UiBinder if the Widget is added and has child elements.
<own:KPICommonView title="First Header" description="I am a happy description :)" anchorToken="{nameAnchors.getFirst}">
<g:Label>child component</g:Label>
</own:KPICommonView>
I am not sure if I do a PresenterWidget for every segment and every PresenterWidget has one of the KPICommonView added, or if I do one normal Presenter which adds more than one of the CommonViews.
The CommonView furhter creates the PresenterWidget for the menu item on the side. It gets the attributes from the constructor (anchorToken, title) and adds it to the slot (which happens ugly, because the View has hard coded the parent saved to call "addInSlot()". The repeading code for the switch is handled by the KPICommonView.
Background/Context:
I have a HBox as a parent and many child Nodes (Buttons, TextFields, Labels…). The HBox is a child of other container (BorderPane/VBox/Grid)
My questions:
How do I dynamically remove/exclude the parent (HBox) and all its children from layout?
I am looking for some three-state property on Node (like in Microsoft WPF):
Visible – visible and participate in layout
Collapsed – is not visible and do not participate in layout (applies to its children as well)
Hidden – is not visible but participate in layout
http://msdn.microsoft.com/en-us/library/ms590101.aspx
What options does JavaFX offer?
My solutions so far:
hBox.setManaged(false);
this work only for HBox, its children are still present
root.getChildren().remove(hBoxTop);
root.getChildren().add(hBoxTop);
Well, this looks like it could work.., but for example in case of root being BorderPane, once I remove/add and remove the HBox, the space after it remains unused. I already tried requestLayout() but id does not force thr rrot to fill it. Am I missing something? Is it correct approach to this problem?
Edited:
Well, I got this working.
Dynamically removing and adding for this specific case can be achieved by:
Remove:
root.setTop(null);
Add:
root.setTop(hBoxTop);
When I did not call setTop(null) on removal, BorderPane still reserved space for HBox (even after removal from its children).
IMHO: it is not very good model as it is parent-container specific. For example if I change, BorderPane to VBox a I had to change these methods as well. For VBox, remove/add on children collection works but I need to remember index so that HBox appears at same place after calling add.
Using root.setTop(null) is not a good idea because as you say it's specific to BorderPane.
I think the best solution is to use:
root.getChildren().remove(yourPane);
And use layout methods to place your other childrens as you want.
But maybe you should not use a BorderPane in the first place with the behaviors you want in your application.
Notice you can also do root.getChildren().clear() to remove all component and add it again to your layout but differently.
I want to add large string content to a container dynamically.
There are 60 different contents(strings) to be displayed in this container.
To add the string to container, I am adding a TextArea(empty border with 100% transparency).
The problem is that TextArea offers scroll and I do not want it to scroll. Instead I want to grow(increase height) according to content. I am unable to achieve this.
Can you help me out with this?
Or can I use any other component for the purpose?
I am using LWUIT with J2ME.
You can derive text area and return false for isScrollableY() although it should generally work seamlessly even if you don't do that (since your parent layout is scrollable). Is it possible you changed the text area and don't revalidate the parent form on the EDT?
There are problems with text area layout when it is modified by a separate thread (race condition with the layout code).
First put the TextArea.setSingleLineTextArea(false) , and grow by content true.
I have a number of UILabels on a single view of a iphone application ios 4.3. How to handle touch events for all these labels at one time? I wanted to show pop overs on touch of that label. I know popovers are not available on iphone and will be making my custom ones.
what i did was using UITapGestureRecognizer and adding an action #selector(labelTap:) and then doing [label addGestureRecognizer:TapGestureRecognizerObject. But when i use the same UITapGestureRecognizer for all my UIlabels only the last added label shows the tap action.
i have set userInteractionEnable to YES.
Can any one point me to the right direction?
You need to create separate UITapRecognizer for tracking different UILabel, when a UIGestureRecognizer is added to multiple views, it will only track event from last it added to. To better understand why you need different instances of UITapRecognizer, think of it as a UIView that only handles touches event but doesn't do any drawing.
I want to place the components A and B over component with List. I need that would text of list will be to visible. I can not find which layout can do it.
How this behavior is in lwuit? What solutions exist?
The question is somewhat unclear, jmunoz answer is correct if you want component's A and B to reside at the bottom of the screen and the list to scroll above. However from the drawing it seems you want an "always on top" effect which you can achieve either via a glass pane (for non-interactive components) or via the LayeredLayout class.
This is actually quite simple using the following:
myForm.setLayout(new LayeredLayout());
myForm.setScrollable(false);
// will occupy the entire area of the form but should be scrollable
myForm.addComponent(componentUnderneath);
Container south = new Container(new BorderLayout());
myForm.addComponent(south);
south.addComponent(BorderLayout.SOUTH, whateverYouWantToPlaceOnTopInTheSouth);
You must do the following:
The Form must not do scroll. Use Form.setScrollable(false). Set the layout of the ´Form´ to BORDER_LAYOUT, myForm.setLayout(new BorderLayout()) . Ok in BorderLayoutyou can put the components in the Form as you want.
Put the Listcomponent in the center of the BorderLayout with myForm.addComponent(BorderLayout.CENTER, List) and the other two elements in the south of the layout using
Container southContainer = new Container();
southContainer.addComponent(A);
southContainer.addComponent(B);
myForm.addComponent(BorderLayout.SOUTH, southContainer)
With this you can get a scrollable Listand two elements always visible.