I'm encountering a problem about resizing the column based on the cell that has the longest content. In the following example, I want all cell's width re-adjust according to the length of the content in "ADDRESS" column. Please help, and thank you in advance.
public void setPnLTable(int x, int y){
String[] ColNames = {"Name", "AGE", "ADDRESS"};
private String [][] getData(){t[0][0] = "John Smith"; t[0][1] = "55"; t[0][2] = "1600 Pennsylvania Ave NW, Washington, DC 20500";
DefaultTableModel tm = new DefaultTableModel(getData(),ColNames);
//
jPnLTABLE = new JTable(tm);
// Center Columns
cr.setHorizontalAlignment( JLabel.CENTER );
for (int i = 0; i < ColNames.length; i++){
jPnLTABLE.getColumnModel().getColumn(i).setCellRenderer(cr);
}
jPnLTABLE.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
JScrollPane js = new JScrollPane(jPnLTABLE);
//
js.setBounds(x, y, 2000, 500); // IT'S HARD-CODED;
//CAN I RESIZE IT BASED ON THE LENGTH OF THE CELL CONTENT
jPnLTABLE.getTableHeader().setReorderingAllowed(false);
jPnLTABLE.getTableHeader().setFont(new Font(null, Font.BOLD, 12));
add(js);
}
If you make your JFrame a BorderLayout and put your JScrollPane BorderLayout.CENTER no need at all to set the size of the JSrollPane it will take all the available space
If your JScrollPane is inside a cell of a GridLayout no problem neither it will re-ajust no need to set its size
Allways easier to put the JScrollPane inside a JPanel (GridLayout(1,1) or BorderLayout.CENTER) and let the Layout manager to do the adjustement on the JPanel.
or maybe you can use
table.setFillsViewportHeight( true );
Related
Need help to generate a pdf with a list of image and text describing the image under it.
Tried the below, but getting image and text beside each other. Please need help with this. Thanks.
........
PdfPTable table = new PdfPTable(1);
table.setHorizontalAlignment(Element.ALIGN_CENTER);
table.setSplitRows(true);
table.setWidthPercentage(90f);
Paragraph paragraph = new Paragraph();
for (int counter = 0; counter < empSize; counter++) {
String imgPath = ... ".png");
Image img = Image.getInstance(imgPath);
img.scaleAbsolute(110f, 95f);
Paragraph textParagraph = new Paragraph("Test" + counter));
textParagraph.setLeading(Math.max(img.getScaledHeight(), img.getScaledHeight()));
textParagraph.setAlignment(Element.ALIGN_CENTER);
Phrase imageTextCollectionPhase = new Phrase();
Phrase ph = new Phrase();
ph.add(new Chunk(img, 0, 0, true));
ph.add(textParagraph);
imageTextCollectionPhase.add(ph);
paragraph.add(imageTextCollectionPhase);
}
PdfPCell cell = new PdfPCell(paragraph);
table.addCell(cell);
doc.add(table);
I assume that you want to get a result that looks like this:
In your case, you are adding all the content (all the images and all the text) to a single cell. You should add them to separate cells as is done in the MultipleImagesInTable example:
public void createPdf(String dest) throws IOException, DocumentException {
Image img1 = Image.getInstance(IMG1);
Image img2 = Image.getInstance(IMG2);
Image img3 = Image.getInstance(IMG3);
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream(dest));
document.open();
PdfPTable table = new PdfPTable(1);
table.setWidthPercentage(20);
table.addCell(img1);
table.addCell("Brazil");
table.addCell(img2);
table.addCell("Dog");
table.addCell(img3);
table.addCell("Fox");
document.add(table);
document.close();
}
You can easily change this proof of concept so that a loop is used. Just make sure you put the addCell() methods inside the loop instead of outside the loop.
You can also explicitly create a PdfPCell and combine the text and the image in the same cell like this:
PdfPCell cell = new PdfPCell();
cell.addElement(img1);
cell.addElement(new Paragraph("Brazil"));
table.addCell(cell);
I would like to generate pdf which contains table with border and having more data in that table so when generating pdf it is generated in two pages. But the problem is table borders not expanding
page to page i.e, in the next page borders(horizontal),previous page vertical border framed again which is wrong. Horizontal in next page, Vertical in previous page should not come.
Please find the attached pdf file and html file for reference.
Generated PDf file with my code
Sample html file
You want a table that looks like this custom_border2.pdf.
As explained in my comments, you need to set the borders of the cell to NO_BORDER, either by changing the default cell:
table.getDefaultCell().setBorder(Rectangle.NO_BORDER);
Or by changing the properties of specific cells:
PdfPCell cell = new PdfPCell(new Phrase(TEXT));
cell.setBorder(Rectangle.NO_BORDER);
Or both.
Then you have to create a table event:
class BorderEvent implements PdfPTableEventAfterSplit {
protected boolean bottom = true;
protected boolean top = true;
public void splitTable(PdfPTable table) {
bottom = false;
}
public void afterSplitTable(PdfPTable table, PdfPRow startRow, int startIdx) {
top = false;
}
public void tableLayout(PdfPTable table, float[][] width, float[] height,
int headerRows, int rowStart, PdfContentByte[] canvas) {
float widths[] = width[0];
float y1 = height[0];
float y2 = height[height.length - 1];
float x1 = widths[0];
float x2 = widths[widths.length - 1];
PdfContentByte cb = canvas[PdfPTable.LINECANVAS];
cb.moveTo(x1, y1);
cb.lineTo(x1, y2);
cb.moveTo(x2, y1);
cb.lineTo(x2, y2);
if (top) {
cb.moveTo(x1, y1);
cb.lineTo(x2, y1);
}
if (bottom) {
cb.moveTo(x1, y2);
cb.lineTo(x2, y2);
}
cb.stroke();
cb.resetRGBColorStroke();
bottom = true;
top = true;
}
}
The splitTable() and afterSplitTable() method will keep track if a top or bottom border needs to be drawn. The actual borders are drawn in the tableLayout() method.
You need to set this table event right after creating the table:
PdfPTable table = new PdfPTable(2);
BorderEvent event = new BorderEvent();
table.setTableEvent(event);
Now you will have the desired behavior as explained in my initial comment. You can find the full code sample here. I have provided a more complex example here.
After I set a column's WrapText=true, I want to see what the new height of the row will be (i.e. if the text wraps, for how many lines). It appears that the Height property of a row is not updated.
ExcelPackage pkg = new ExcelPackage();
ExcelWorksheet sheet = pkg.Workbook.Worksheets.Add("Test");
// height is 15.0
double heightBefore = sheet.Row(1).Height;
sheet.Cells[1, 1].Value = "Now is the time for all good men to come to the aid of their country";
ExcelColumn col = sheet.Column(1);
// this will resize the width to 60
col.AutoFit();
if (col.Width > 50)
{
col.Width = 50;
// this is just a style property, and doesn't actually execute any recalculations
col.Style.WrapText = true;
}
// so this is still 15.0. How do I get it to compute what the size will be?
double heightAfter = sheet.Row(1).Height;
// open the xls, and the height is 30.0
pkg.SaveAs(new System.IO.FileInfo("text.xlsx"));
In fact, a search for the Height property (or the underlying field _height) shows that it is only set by the property setter, and does not ever seem to be set based on anything else (like content in the row).
Any ideas on how I can get a refreshed Height for a row?
Thanks
The general pattern I've noticed with EPPlus is that it generates the framework of the document with the minimum amount of information necessary. Then, when you open the file, Excel fills out the remaining XML structure, which is why you always have to save the file after opening an EPPlus generated document.
For your question, I'm assuming that Excel is updating the row heights after you open the Excel file so EPPlus would not have the updated row height information. I'm not absolutely certain that the library doesn't support this, but like you I was unable to find a way to get the updated values.
One workaround however could be to just calculate what the value would be since you know your text length and column width:
ExcelPackage pkg = new ExcelPackage();
ExcelWorksheet sheet = pkg.Workbook.Worksheets.Add("Test");
// height is 15.0
double heightBefore = sheet.Row(1).Height;
var someText = "Now is the time for all good men to come to the aid of their country. Typewriters were once ground-breaking machines.";
sheet.Cells[1, 1].Value = someText;
ExcelColumn col = sheet.Column(1);
ExcelRow row = sheet.Row(1);
// this will resize the width to 60
col.AutoFit();
if (col.Width > 50)
{
col.Width = 50;
// this is just a style property, and doesn't actually execute any recalculations
col.Style.WrapText = true;
}
// calculate the approximate row height and set the value;
var lineCount = GetLineCount(someText, (int)col.Width);
row.Height = heightBefore * lineCount;
// open the xls, and the height is 45.0
pkg.SaveAs(new System.IO.FileInfo("text.xlsx"));
Here's the method to calculate the number of lines:
private int GetLineCount(String text, int columnWidth)
{
var lineCount = 1;
var textPosition = 0;
while (textPosition <= text.Length)
{
textPosition = Math.Min(textPosition + columnWidth, text.Length);
if (textPosition == text.Length)
break;
if (text[textPosition - 1] == ' ' || text[textPosition] == ' ')
{
lineCount++;
textPosition++;
}
else
{
textPosition = text.LastIndexOf(' ', textPosition) + 1;
var nextSpaceIndex = text.IndexOf(' ', textPosition);
if (nextSpaceIndex - textPosition >= columnWidth)
{
lineCount += (nextSpaceIndex - textPosition) / columnWidth;
textPosition = textPosition + columnWidth;
}
else
lineCount++;
}
}
return lineCount;
}
One thing to keep in mind is that Excel has a max row height of 409.5 so you'll want to make sure your column width is not so narrow that you'll reach this limit.
Also, another thing I noticed is that the column widths that you manually set with EPPlus don't actually set the columns to the expected value. For example, if you set your column width to 50, you'll notice that the actual column width is set to 49.29 so you may want to factor that in as well.
In what dimensions and direction is the Rectangle in the
PDFTextStripperByArea's function addRegion(String regionName, Rectangle2D rect).
In other words, where does the rectangle R start and how big is it (dimensions of the origin values, dimensions of the rectangle) and in what direction does it go (direction of the blue arrows in illustration), if new Rectangle(10,10,100,100) is given as a second parameter?
new Rectangle(10,10,100,100)
means that the rectangle will have its upper-left corner at position (10, 10), so 10 units far from the left and the top of the PDF document. Here a "unit" is 1 pt = 1/72 inch.
The first 100 represents the width of the rectangle and the second one its height.
To sum up, the right picture is the first one.
I wrote this code to extract some areas of a page given as arguments to the function:
Rectangle2D region = new Rectangle2D.Double(x, y, width, height);
String regionName = "region";
PDFTextStripperByArea stripper;
stripper = new PDFTextStripperByArea();
stripper.addRegion(regionName, region);
stripper.extractRegions(page);
So, x and y are the absolute coordinates of the upper-left corner of the Rectangle and then you specify its width and height. page is a PDPage variable given as argument to this function.
Was looking into doing something like this, so I thought I'd pass what I found along.
Here's the code for creating my original pdf using itext.
import com.lowagie.text.Document
import com.lowagie.text.Paragraph
import com.lowagie.text.pdf.PdfWriter
class SimplePdfCreator {
void createFrom(String path) {
Document d = new Document()
try {
PdfWriter writer = PdfWriter.getInstance(d, new FileOutputStream(path))
d.open()
d.add(new Paragraph("This is a test."))
d.close()
} catch (Exception e) {
e.printStackTrace()
}
}
}
If you crack open the pdf, you'll see the text in the upper left hand corner. Here's the test showing what you are looking for.
#Test
void createFrom_using_pdf_box_to_extract_text_targeted_extraction() {
new SimplePdfCreator().createFrom("myFileLocation")
def doc = PDDocument.load("myFileLocation")
Rectangle2D.Double d = new Rectangle2D.Double(0, 0, 120, 100)
def stripper = new PDFTextStripperByArea()
def pages = doc.getDocumentCatalog().allPages
stripper.addRegion("myRegion", d)
stripper.extractRegions(pages[0])
assert stripper.getTextForRegion("myRegion").contains("This is a test.")
}
Position (0, 0) is the upper left hand corner of the document. The width and height are heading down and to the right. I was able to trim down the range a bit to (35, 52, 120, 3) and still get the test to pass.
All code is written in groovy.
Code in java using PDFBox.
public String fetchTextByRegion(String path, String filename, int pageNumber) throws IOException {
File file = new File(path + filename);
PDDocument document = PDDocument.load(file);
//Rectangle2D region = new Rectangle2D.Double(x,y,width,height);
Rectangle2D region = new Rectangle2D.Double(0, 100, 550, 700);
String regionName = "region";
PDFTextStripperByArea stripper;
PDPage page = document.getPage(pageNumber + 1);
stripper = new PDFTextStripperByArea();
stripper.addRegion(regionName, region);
stripper.extractRegions(page);
String text = stripper.getTextForRegion(regionName);
return text;
}
How can I add some text on top of a bar in a chart.
This is the code I have to add the bar:
var color = ColorTranslator.FromHtml(row.Colour);
var barItem = graphPane.AddBar(row.Propensity.ToString(), null, Ys.ToArray(), color);
Thank you
Here is a quick example using TextObj to simply add labels to each bar.
GraphPane myPane = zedGraphControl1.GraphPane;
double[] y = { 100, 50, 75, 125 };
BarItem myBar = myPane.AddBar("Data", null, y, Color.Red);
for (int i = 0; i < myBar.Points.Count; i++)
{
TextObj barLabel = new TextObj(myBar.Points[i].Y.ToString(), myBar.Points[i].X, myBar.Points[i].Y + 5);
barLabel.FontSpec.Border.IsVisible = false;
myPane.GraphObjList.Add(barLabel);
}
myBar.Label.IsVisible = true;
zedGraphControl1.AxisChange();
zedGraphControl1.Invalidate();
Of course this just uses the value of the data as the label. If you wanted to use custom labels, you could create a string array or list and use that inside the loop.
Here are some ZedGraph references:
Introduction and examples: http://www.codeproject.com/KB/graphics/zedgraph.aspx
Source code documentation: http://zedgraph.sourceforge.net/documentation/default.html
You need to define AlignH and AlignV in your text object:
TextObj textLabel = new TextObj(value.ToString(), positionX, value, CoordType.AxisXYScale, AlignH.Center, AlignV.Top);
AlignV define the position of your value on the bar.
Providing you want the label text to match the value of each bar, then you can do it with a single line of code:
BarItem.CreateBarLabels(graphPane, false, "F0");
Note that the 3rd parameter is a double.ToString format. e.g. "F0" = 12, "F2" = 12.34
However, if you want any flexibity with it then this solution is not ideal. It also doesn't work very well if you have a stacked bar chart, because having any 0 value data will cause labels to overlap and look horrific