Color cell according to condition

问题

I have a table in which I have to set background color when the cell in header and cell in row appear as pair in a certain list in data source. For example: column : "AUD, USD" row : "BRL, CZK"

in the cell of column AUD and row is BRL I check if exists in the list in datasource "AUD-BRL" and if so I need to color in a green

Now, I thought to do it in this way: columns and rows will be in lists. I go over both lists and then color in those indexes the cell.

So that I will have one function for whole table and not have to call from each cell to function (There are 1200 cells overall). How can that be done?

回答1:

The answer from Fede MG is correct.

If I understand your question correctly, you want to add a highlighting rule to all cells in the table detail row. Unfortunately I think it is a bit cumbersome to achieve this in BIRT.

I assume that your table has e.g. bindings like COL_VALUE_1, ..., COL_VALUE_9 for the cell values and COL_TITLE_1, ..., COL_TITLE_9 for the column headers.

Furthermore I assume a bit of experience with using Javascript in BIRT.

The way I do this like this:

For each detail cell I create a onCreate event script with code like this:

highlightDetailCell(this, row, 1);

... where 1 is the column number. E.g. this is the code for the first column, for the second column i replace the 1 with 2 and so on. One can quickly do this with copy&paste.

Next I implement the logic in a function inside the onInitialize script of the report like this:

function highlightDetailCell(item, row, colnum) {
    var colTitle = row["COL_TITLE_" + colnum];
    var colValue = row["COL_VALUE_" + colnum];
    var highlight = use_your_logic_to_decide(colTitle, colValue);
    if (highlight) {
        item.get_Style().backgroundColor = "yellow";
    }
}

This is the basic idea. If you want to add the script to many cells, it might be a lot of work to do this by hand. In fact it is possible to attach the call to the highlightDetailCell function with a script (of course, this is BIRT :-). You should read the documentation and just tinker with the Design Engine API (DE API for short).

But be warned that writing and debugging such a script may be even more work than doing the donkey work of adding and editing a one-liner to 1200 cells!

What I once did was basically this (in the onFactory event of the report item):

// This code is a simplified version that modifies just the first cell,
// However it should point you into the right direction.

// Some preparation
importPackage(Packages.org.eclipse.birt.report.model.api);
var myconfig = reportContext.getReportRunnable().getReportEngine().getConfig();
var de = DataEngine.newDataEngine( myconfig, null );
var elementFactory = reportContext.getDesignHandle().getElementFactory();

// Find the item you want to modify (in my case, a "Grid Item").
// Note that for tables, the structure is probably a bit different.
// E.G. tables have header, detail and footer rows, 
// while grids just have rows.
var containerGrid = reportContext.getDesignHandle().findElement("Layout MATRIX");

// Get the first row
var row0 = containerGrid.getRows().get(0);
// Do something with the first cell (:
var cell = row0.getCells().get(0).getContent();
cell.setStringProperty("paddingTop", "1pt");
cell.setStringProperty("paddingLeft", "1pt");
cell.setStringProperty("paddingRight", "1pt");
cell.setStringProperty("paddingBottom", "1pt");
cell.setStringProperty("borderBottomColor", "#000000");
cell.setStringProperty("borderBottomStyle", "solid");
cell.setStringProperty("borderBottomWidth", "thin");
cell.setStringProperty("borderTopColor", "#000000");
cell.setStringProperty("borderTopStyle", "solid");
cell.setStringProperty("borderTopWidth", "thin");
cell.setStringProperty("borderLeftColor", "#000000");
cell.setStringProperty("borderLeftStyle", "solid");
cell.setStringProperty("borderLeftWidth", "thin");
cell.setStringProperty("borderRightColor", "#000000");
cell.setStringProperty("borderRightStyle", "solid");
cell.setStringProperty("borderRightWidth", "thin");

// When you're finished:
de.shutdown( );

Things are more complicated if you have to handle merged cells.

You could even add content to the cell (I created a whole matrix dynamically this way).

The script does not exactly what you want (add the script to each cell), but I leave this as an exercise...

It is also helpful to save the dynamically modified report design for opening in the designer, to see the outcome:

reportContext.getDesignHandle().saveAs("c:/temp/modified_report.rptdesign");

HTH

回答2:

Go to the cell you want to format (applies also to elements like rows or columns), on the "Property Editor" go to "Highlights" and click "Add...". You'll get a dialog where you can enter a condition for the highlight and what styling to apply on the element if the condition is true.

Screenshot here

来源：https://stackoverflow.com/questions/64366970/color-cell-according-to-condition