ListField and table LayoutManager

Hello.

I think that maybe that's my problem.

I make use of this TableLayoutmanager (that I found on this site):

public class TableLayoutManager extends Manager{ public TableLayoutManager(){ super(0); }     public void drawRow(Graphics g, int x, int y, int width, int height){ // Arrange the cell fields within this row manager. layout(width, height); // Place this row manager within its enclosing list. setPosition(x, y); // Apply a translating/clipping transformation to the graphics // context so that this row paints in the right area. g.pushRegion(getExtent()); // Paint this manager's controlled fields. subpaint(g); g.setColor(0x00CACACA); g.drawLine(0, 0, getPreferredWidth(), 0); // Restore the graphics context. g.popContext(); } protected void sublayout(int width, int height) { // TODO Auto-generated method stub int preferredWidth = getPreferredWidth(); int preferredHeight = getPreferredHeight(); Field field = getField(0); layoutChild(field, preferredWidth - 110, preferredHeight); setPositionChild(field, 35, 12); field = getField(1); layoutChild(field, 75, preferredHeight); setPositionChild(field, preferredWidth-75, 11); setExtent(preferredWidth, preferredHeight); } public int getPreferredWidth() { return Graphics.getScreenWidth(); } // The preferred height of a row is the "row height" as defined in the // enclosing list. public int getPreferredHeight() { return getContentHeight(); } }

for this ListField:

public class MenuListField extends ListField implements ListFieldCallback { /* * This code created based on rtm4bb HomeMenuListField.java */ private Font font; TableLayoutManager[] rows; public MenuListField(){ // this number should be the same with rows = new TableRowManager[7] // or list item in item field wont show super(9); setEmptyString("sorry, No Menu", DrawStyle.HCENTER); setCallback(this); // this row height to show the height setRowHeight(36); font = Font.getDefault(); rows = new TableLayoutManager[9]; // create a table row manager rows[0] = new TableLayoutManager(); // set the menu item name rows[0].add(new RichTextField("Computer Literacy", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[0].add(new LabelField("All our Computer Literacy Options", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[0].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[1] = new TableLayoutManager(); // set the menu item name rows[1].add(new RichTextField("Office Assistant", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[1].add(new LabelField("Secretarial Courses", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[1].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[2] = new TableLayoutManager(); // set the menu item name rows[2].add(new RichTextField("Pastel", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[2].add(new LabelField("Pastel Options", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[2].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[3] = new TableLayoutManager(); // set the menu item name rows[3].add(new RichTextField("Technical", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[3].add(new LabelField("Technical Courses", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[3].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[4] = new TableLayoutManager(); // set the menu item name rows[4].add(new RichTextField("Graphic Design", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[4].add(new LabelField("Graphic Design Courses", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[4].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[5] = new TableLayoutManager(); // set the menu item name rows[5].add(new RichTextField("IT", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[5].add(new LabelField("Our IT Options", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[5].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[6] = new TableLayoutManager(); // set the menu item name rows[6].add(new RichTextField("Web Design", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[6].add(new LabelField("Web Design Courses", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[6].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[7] = new TableLayoutManager(); // set the menu item name rows[7].add(new RichTextField("Programming", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[7].add(new LabelField("Our Programming Options", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[7].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[8] = new TableLayoutManager(); // set the menu item name rows[8].add(new RichTextField("Business Admin", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[8].add(new LabelField("Business Oriented Courses", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[8].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); // create a table row manager rows[9] = new TableLayoutManager(); // set the menu item name rows[9].add(new RichTextField("Two Year", DrawStyle.ELLIPSIS)); // set the number of list items if there are any rows[9].add(new LabelField("Two Year Courses", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); rows[9].add(new LabelField("For All Prices and Course Content, Click Here!", DrawStyle.ELLIPSIS | Field.USE_ALL_WIDTH | DrawStyle.RIGHT)); } public void drawListRow(ListField listField, Graphics graphics, int index, int y, int width) { // TODO Auto-generated method stub MenuListField list = (MenuListField) listField; TableLayoutManager rowManager = list.rows[index]; rowManager.drawRow(graphics, 0, y, width, list.getRowHeight()); } public Object get(ListField listField, int index) { // TODO Auto-generated method stub return null; } public int getPreferredWidth(ListField listField) { // TODO Auto-generated method stub return Graphics.getScreenWidth(); } public int indexOfList(ListField listField, String prefix, int start) { // TODO Auto-generated method stub return -1; } protected boolean trackwheelClick(int status, int time) { int index = getSelectedIndex(); // Dialog.inform("Clicked " + Integer.toString(index)); /*if( index == 0 ) { new MenuCategoryController(); } */ switch(index) { case 0: UiApplication.getUiApplication().pushScreen(new ComputerLiteracyScreen()); break; case 1: UiApplication.getUiApplication().pushScreen(new OfficeAssistantScreen()); break; case 2: UiApplication.getUiApplication().pushScreen(new PastelScreen()); break; case 3: UiApplication.getUiApplication().pushScreen(new TechnicalScreen()); break; case 4: UiApplication.getUiApplication().pushScreen(new GraphicDesignScreen()); break; case 5: UiApplication.getUiApplication().pushScreen(new ITScreen()); break; case 6: UiApplication.getUiApplication().pushScreen(new WebDesignScreen()); break; case 7: UiApplication.getUiApplication().pushScreen(new ProgrammingScreen()); break; case 8: UiApplication.getUiApplication().pushScreen(new BusinessAdminScreen()); break; case 9:      UiApplication.getUiApplication().pushScreen(new TwoYearScreen());   break; } return true; } }

And I call it like:

 MenuListField mylist = new MenuListField();

Now my app keeps throwing errors IndexOutOfBounds.

I've implemented the table layout manager properly?

Hannes

In your situation, I think that most of the BlackBerry users expect to see a drill down, where they see a list of courses in a ListField, then click on the course to see more detail for this course in a different window.

Tags: BlackBerry Developers

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