Paging listbox with vflex - how to set rows?

answered 2009-09-10 18:52:03 +0800

terrytornado
9393 ● 3 ● 7 ● 16
http://www.oxitec.de/

updated 2009-09-10 18:58:01 +0800

I helped me with the onClientInfo() event at my root window that stores the browsers heigt and width in variables.
I got from there the height and then calculate what is over for the listbox when i subtract the search panels, toolbars
and others obove it.

Than i calulate the count of possible visible rows. Problem is when a user changes the fontsize with Strg+ or Strg-

best
Stephan

	public void onCreate$window_BranchesList(Event event) throws Exception {

		/* autowire comps and vars */
		doOnCreateCommon(window_BranchesList, event);

                ...

		/**
		 * calculate how many rows have been place on desktop. and set it to the
		 * listBox.
		 */
		int maxListBoxHeight = (UserWorkspace.getInstance().getCurrentDesktopHeight() - 155);
		countRows = Math.round(maxListBoxHeight / 17);

		borderLayout_branchList.setHeight(String.valueOf(maxListBoxHeight) + "px");
                ...

		// set the paging params
		paging_BranchList.setPageSize(countRows);
		paging_BranchList.setDetailed(true);

                ...

from the RootWindow Controller:

	/**
	 * Gets the current desktop height and width and <br>
	 * stores it in the UserWorkspace properties. <br>
	 * We use these values for calculating the count of rows in the listboxes. <br>
	 * 
	 * @param event
	 * @throws Exception
	 */
	public void onClientInfo(ClientInfoEvent event) throws Exception {

		if (logger.isDebugEnabled()) {
			logger.debug("Current desktop height :" + event.getDesktopHeight());
			logger.debug("Current desktop width  :" + event.getDesktopWidth());
		}

		UserWorkspace.getInstance().setCurrentDesktopHeight(event.getDesktopHeight());
		UserWorkspace.getInstance().setCurrentDesktopWidth(event.getDesktopWidth());

	}

answered 2009-09-11 07:08:51 +0800

smigol
316 ● 2

Hi,
you try use fixedLayout="true" listbox property!

<borderlayout>
	<north>
             .....
             .....
	</north>
	<center>
		<listbox id="experts" vflex="true"
			mold="paging" pagingPosition="bottom" fixedLayout="true">
			<listhead>
				<listheader label="Surname" />
				<listheader label="First name" />
				<listheader label="Alias" />
			</listhead>
		</listbox>
	</center>
</borderlayout>
 

ORAZIO

answered 2009-09-11 18:12:20 +0800

terrytornado
9393 ● 3 ● 7 ● 16
http://www.oxitec.de/

@davout.

If the zk team can implement your request this would be a great easement for us all.
Hope they do a listbox.getPossibleRowCount() for the paging component :-)

Stephan

answered 2009-09-11 18:27:27 +0800

smigol
316 ● 2

updated 2009-09-11 18:28:11 +0800

@terrytornado

Hi Stephan, I do not understand your request! Forgive me but I do not seem useful to know how many lines can accommodate a listbox with specific vertical size ... plus I think the value obtained by a prospective properties listbox.getPossibleRowCount is not real because a row may contain a column of type text very large! I hope I explained myself well!

ORAZIO

answered 2009-09-11 18:55:36 +0800

smigol
316 ● 2

To complete my opinion, I believe that at this time is more appropriate, given fixed space (the container that hosts the listbox) and set a certain number of lines per page, the listbox is automatically sized and correctly by showing correctly scollbar vertical and the arrows and the shift from one line and another works well! problems that I have already highlighted in some thread:
- http://www.zkoss.org/forum/index.zul#path%3DlistComment%3BdiscussionId%3D9580%3BcategoryId%3D14%3B
- http://www.zkoss.org/forum/index.zul#path%3DlistComment%3BdiscussionId%3D9496%3BcategoryId%3D14%3B

regards

ORAZIO

answered 2009-09-11 19:35:11 +0800

terrytornado
9393 ● 3 ● 7 ● 16
http://www.oxitec.de/

Yes, i know what you mean.

For us it's the kick if there are no space between the listbox and the component under it without scrollbars.
Where the listbox has fixed rows for the paging. So we calculate the space we have for the listbox
and calculate how many lines can in there. :-)

Yes, i saw you threads. Do you mean with arrow keys the keybord keys ( -> <- should be up and down)?

regards
Stephan