What do you mean by "getting it as a widget from the cell in the main flextable". Sorry, I think I have a mental block.
On Aug 14, 6:19 pm, Ian Bambury <ianbamb...@gmail.com> wrote: > If I understand you correctly, you should be able to get the nested > flextable by getting it as a widget from the cell in the main flextable and > casting it. > Ian > > http://examples.roughian.com > > 2009/8/14 Tobe <tobias.jungnic...@googlemail.com> > > > > > > > I think my current version is (nearly) like your FlexTable version. > > The first layer is working, because it's just one FlexTable. In layer > > 2 there is one FlexTable for each different layer 1 FlexTable element. > > The problems are just the NullPointerExceptions in layer 2 when I want > > to access another FlexTable, than the last one, that is out of the > > scope. How can I access this "old" FlexTables? Do I have to save them > > in a vector or do I just have to define them in another scope? How > > does it works? > > > On Aug 12, 8:38 pm, Ian Bambury <ianbamb...@gmail.com> wrote: > > > OK, I understand the kind of problem now. > > > You have an awful lot of possibilities to consider - you could have a > > > tree-explorer setup for example. > > > > If you want the kind of look you have suggested, then I would probably > > (if > > > it were me) consider the FlexTable approach you have suggested: > > > > - first line spans the whole width and contains details of the exam > > > itself > > > > - after that, pairs of FlexTable lines - the first has cells with the > > > various fields you want to display for the exam section header, the > > second > > > spans the whole width and contains another widget with details of the > > > exercises. This could be a flextable, or maybe a VP with each section > > > displaying a class for the exercise. > > > > I would suggest (whatever my suggestion is worth) that you concentrate on > > > the first level first. Basically you have the same design problem at each > > > level - a list which requires the insertion of elements. > > > > You need to consider the abilities of your users - can they cope with > > > left-click menus? Do they need blindingly obvious 'Insert A Line Here' > > > buttons? > > > > The simplest answer all-round is to have 'Insert Here' buttons everywhere > > > and insert two lines above- one is the new line, and one is a new 'Insert > > > Here' button. > > > > A big concern is if you need to save this to a database (which you will > > > unless this is just an academic exercise) and at what point do you do > > this. > > > > But the simple answer is a flextable > > > > InsertAbove Button > > > Detail Line ================================> > > > InsertAbove Button > > > Detail Line ================================>InsertAbove Button > > > Detail Line ================================>InsertAbove Button > > > Detail Line ================================>InsertAbove Button > > > > Once you have that working, create a similar class that does the exercise > > > details and insert that into the detail line > > > > Does that make sense? If not, feel free to say so :-) > > > > Ian > > > >http://examples.roughian.com > > > > 2009/8/12 Tobe <tobias.jungnic...@googlemail.com> > > > > > What I forget to say is that the problems are the > > > > NullPointerExceptions when you add inner elements not at the last > > > > position. > > > > > The project is about creating exams. The outer container are parts of > > > > the exams with a description what the part is about. The inner > > > > container are the exercise with a description what the students have > > > > to do. > > > > > On Aug 12, 6:01 pm, Ian Bambury <ianbamb...@gmail.com> wrote: > > > > > Hi Tobe, > > > > > Sorry - what I meant was: can you give a use case example for what > > you > > > > are > > > > > trying to do. > > > > > > I need more of an idea of how it will be used before I can get my > > head > > > > > around this. > > > > > > For example, you might want to create a set of instructions (say a > > > > recipe) > > > > > where everything is done in order so you need to be able to > > insert/append > > > > > steps and move them up and down. > > > > > > I had a look at your example code and some of it works, but I'm > > getting > > > > > NullPointerExceptions for addInner. > > > > > > I don't understand why you need addinner and addouter. A real-world > > > > example > > > > > would help. > > > > > > Cheers, > > > > > > Ian > > > > > >http://examples.roughian.com > > > > > > 2009/8/12 Tobe <tobias.jungnic...@googlemail.com> > > > > > > > @Ian: > > > > > > ok, I have an example what I created so far.I used FlexTables, > > because > > > > > > I think it's the right one for this problem. > > > > > > All starts with a FlexTable and a button inside for new outer > > > > > > elements. If the user clicks the button, there will be added one > > new > > > > > > row with a TextBox and a button inside a new inner FlexTable to add > > a > > > > > > new inner element and one row to add a new outer element at the > > end. > > > > > > The user can add new outer elements after the first outer button > > and > > > > > > at the end (after the second outer button) - so he can always add > > > > > > outer elements at any position. If the user adds the inner button > > > > > > there will be added, like the outer one, one new row to the inner > > > > > > FlexTable with a new TextBox and one new row with a button to add > > new > > > > > > inner elements. So shall be just this two layers and no third one, > > so > > > > > > there will be added just TextBoxes in the inner FlexTable and no > > new > > > > > > buttons to add inner-inner elements. > > > > > > Here is my code: > > > > > > > package de.testgwt.client; > > > > > > > import com.google.gwt.core.client.EntryPoint; > > > > > > import com.google.gwt.event.dom.client.ClickEvent; > > > > > > import com.google.gwt.event.dom.client.ClickHandler; > > > > > > import com.google.gwt.user.client.ui.AbsolutePanel; > > > > > > import com.google.gwt.user.client.ui.Button; > > > > > > import com.google.gwt.user.client.ui.FlexTable; > > > > > > import com.google.gwt.user.client.ui.HTML; > > > > > > import com.google.gwt.user.client.ui.RootPanel; > > > > > > import com.google.gwt.user.client.ui.TextBox; > > > > > > import com.google.gwt.user.client.ui.HTMLTable.Cell; > > > > > > > public class TestGWT implements EntryPoint { > > > > > > > FlexTable tableOuter; > > > > > > FlexTable tableInner; > > > > > > AbsolutePanel divOuter; > > > > > > AbsolutePanel divInner; > > > > > > > public void onModuleLoad() { > > > > > > System.out.println("---------------"); > > > > > > > Button buttonAddOuter = new Button("add uter"); > > > > > > buttonAddOuter.addClickHandler(new ClickHandler(){ > > > > > > public void onClick(ClickEvent event){ > > > > > > add(event); > > > > > > } > > > > > > }); > > > > > > > divOuter = new AbsolutePanel(); > > > > > > divOuter.add(buttonAddOuter); > > > > > > > tableOuter = new FlexTable(); > > > > > > tableOuter.setWidget(0, 0, divOuter); > > > > > > RootPanel.get().add(tableOuter); > > > > > > } > > > > > > > public void add(ClickEvent event){ > > > > > > Cell cellForEvent = > > tableOuter.getCellForEvent(event); > > > > > > System.out.println("tableOuter: > > > > "+tableOuter.hashCode()+" / > > > > > > row: > > > > > > "+cellForEvent.getRowIndex()); > > > > > > > divOuter = new AbsolutePanel(); > > > > > > divOuter.add(new TextBox()); > > > > > > > tableInner = new FlexTable(); > > > > > > > Button buttonAddInner = new Button("add Inner"); > > > > > > buttonAddInner.addClickHandler(new ClickHandler(){ > > > > > > public void onClick(ClickEvent event){ > > > > > > addInner(event); > > > > > > } > > > > > > }); > > > > > > > tableInner.setWidget(0, 0, buttonAddInner); > > > > > > divOuter.add(tableInner); > > > > > > > tableOuter.insertRow(cellForEvent.getRowIndex()+1); > > > > > > tableOuter.setWidget(cellForEvent.getRowIndex()+1, > > 0, > > > > > > divOuter); > > > > > > > Button buttonAddOuter = new Button("add outer"); > > > > > > buttonAddOuter.addClickHandler(new ClickHandler(){ > > > > > > public void onClick(ClickEvent event){ > > > > > > add(event); > > > > > > } > > > > > > }); > > > > > > > divOuter = new AbsolutePanel(); > > > > > > divOuter.add(buttonAddOuter); > > > > > > > tableOuter.insertRow(cellForEvent.getRowIndex()+2); > > > > > > tableOuter.setWidget(cellForEvent.getRowIndex()+2, > > 0, > > > > > > divOuter); > > > > > > } > > > > > > > public void addInner(ClickEvent event){ > > > > > > Cell cellForEvent = > > tableInner.getCellForEvent(event); > > > > > > System.out.println("tableInner: > > > > "+tableInner.hashCode()+" / > > > > > > row: > > > > > > "+cellForEvent.getRowIndex()); > > > > > > > divInner = new AbsolutePanel(); > > > > > > divInner.add(new TextBox()); > > > > > > > tableInner.insertRow(cellForEvent.getRowIndex()+1); > > > > > > tableInner.setWidget(cellForEvent.getRowIndex()+1, > > 0, > > > > > > divInner); > > > > > > > Button buttonAddInner = new Button("add inner"); > > > > > > buttonAddInner.addClickHandler(new ClickHandler(){ > > > > > > public void onClick(ClickEvent event){ > > > > > > addInner(event); > > > > > > } > > > > > > }); > > > > > > > divInner =... > > read more » --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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