Java (482)
A trendline is a line superimposed on a chart revealing the overall direction of the data. Spire.Presentation for Java supports adding six different types of trendlines to chart, i.e. linear, logarithmic, polynomial, power, exponential and moving average.
The below example demonstrates how to use Spire.Presentation for Java to add a linear trendline to a chart.
import com.spire.presentation.FileFormat;
import com.spire.presentation.ISlide;
import com.spire.presentation.Presentation;
import com.spire.presentation.charts.IChart;
import com.spire.presentation.charts.ITrendlines;
import com.spire.presentation.charts.TrendlineSimpleType;
public class AddTrendlineToChart {
public static void main(String[] args) throws Exception {
//create a Presentation instance
Presentation ppt = new Presentation();
//load the PowerPoint document
ppt.loadFromFile("Chart.pptx");
//get the first slide
ISlide slide = ppt.getSlides().get(0);
//get the chart on the slide
IChart chart = (IChart)slide.getShapes().get(0);
//add a linear trendline to the first series of the chart
ITrendlines trendLine = chart.getSeries().get(0).addTrendLine(TrendlineSimpleType.LINEAR);
//display equation
trendLine.setdisplayEquation(true);
//save the resultant document
ppt.saveToFile("AddTrendline.pptx", FileFormat.PPTX_2013);
}
}
Output:
Published in
Chart
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Java protect presentation slides by setting the property with mark as final
2019-11-19 08:25:39 Written by KoohjiMark as Final means that the presentation slide is final edition and the author doesn’t want any changes on the document. With Spire.Presentation for Java, we can protect the presentation slides by setting the password. This article demonstrates how to mark a presentation as final by setting the document property MarkAsFinal as true.
import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;
public class MarkAsFinal {
public static void main(String[] args) throws Exception {
//Create a PPT document and load file
Presentation presentation = new Presentation();
presentation.loadFromFile("Sample.pptx");
//Set the document property MarkAsFinal as true
presentation.getDocumentProperty().set("_MarkAsFinal", true);
//Save the document to file
presentation.saveToFile("output/MarkasFinal.pptx", FileFormat.PPTX_2010);
}
}
Effective screenshot after mark as final for presentation:
Published in
Security
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This article demonstrates how to add or delete rows and columns in a PowerPoint table using Spire.Presentation for Java.
Here is a screenshot of the sample PowerPoint file:
Add a row and a column
import com.spire.presentation.*;
public class AddRowAndColumn {
public static void main(String[] args) throws Exception {
//load the sample PowerPoint file
Presentation presentation = new Presentation();
presentation.loadFromFile("C:\\Users\\Administrator\\Desktop\\input.pptx");
//get the table in the document
ITable table = null;
for (Object shape : presentation.getSlides().get(0).getShapes()) {
if (shape instanceof ITable) {
table = (ITable) shape;
//add the last row to the end of the table as a new row
int rowCount = table.getTableRows().getCount();
TableRow row = table.getTableRows().get(rowCount - 1);
table.getTableRows().append(row);
//get the new row and set the text for each cell
rowCount = table.getTableRows().getCount();
row = table.getTableRows().get(rowCount - 1);
row.get(0).getTextFrame().setText("America");
row.get(1).getTextFrame().setText("Washington");
row.get(2).getTextFrame().setText("North America");
row.get(3).getTextFrame().setText("9372610");
//add the last column to the end of the table as a new column
int colCount = table.getColumnsList().getCount();
TableColumn column =table.getColumnsList().get(colCount-1);
table.getColumnsList().add(column);
//get the new column and set the text for each cell
colCount = table.getColumnsList().getCount();
column = table.getColumnsList().get(colCount-1);
column.get(0).getTextFrame().setText("Population");
column.get(1).getTextFrame().setText("32370000");
column.get(2).getTextFrame().setText("7350000");
column.get(3).getTextFrame().setText("15040000");
column.get(4).getTextFrame().setText("26500000");
column.get(5).getTextFrame().setText("329740000");
}
}
//save the document
presentation.saveToFile("output/AddRowAndColumn.pptx", FileFormat.PPTX_2013);
}
}
Delete a row and a column
import com.spire.presentation.FileFormat;
import com.spire.presentation.ITable;
import com.spire.presentation.Presentation;
public class DeleteRowAndColumn {
public static void main(String[] args) throws Exception {
//load the sample PowerPoint file
Presentation presentation = new Presentation();
presentation.loadFromFile("C:\\Users\\Administrator\\Desktop\\input.pptx");
//get the table in the document
ITable table = null;
for (Object shape : presentation.getSlides().get(0).getShapes()) {
if (shape instanceof ITable) {
table = (ITable) shape;
//delete the second column
table.getColumnsList().removeAt(1, false);
//delete the second row
table.getTableRows().removeAt(1, false);
}
}
//save the document
presentation.saveToFile("output/DeleteRowAndColumn.pptx", FileFormat.PPTX_2013);
}
}
Published in
Table
Tagged under
