Adding Components to JPanel - Help required

[davedwm]

I'm trying to display a grid of TextPane's that are sized to fit a JPanel i've drawn into a Dialog class, the number of 'Cells' are entered into JTextFields and when the appropriate button is hit this method is executed. Each TextPane is stored as an object in the aray tableGrid. The code compiles fine, but when executed the JPanel remains blank.

I've created did using a book that explains it in AWT and i'm using SWING but so far as i can tell this should work for SWING too

Any help would be much appreciated.

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

//Parse all user input values for Table generation
rows = Integer.parseInt(jTextFieldRows.getText());
cols = Integer.parseInt(jTextFieldCols.getText());
width = Integer.parseInt(jTextFieldWidth.getText());
border = Integer.parseInt(jTextFieldBorder.getText());

//instantiate objects
int rowHeight = 500/rows;
int colWidth = 700/cols;
String labelString;
tableGrid = new Object[cols][rows];

for (int y=0; y<rows; y++);
{
for (int x=0; x<cols; x++);
{
labelString = "jTextPain"+x+y;
JTextPane textPane = new JTextPane();
tableGrid[x][y] = textPane;
textPane.setSize(colWidth, rowHeight);
textPane.setName(labelString);

}
}

jPanelTable.setLayout(new GridLayout(rows,cols));
//Pack the panel with the objects
for (int y=0; y<rows; y++);
{
for (int x=0; x<cols; x++);
{
JTextPane textPane = (JTextPane) tableGrid[x][y];
jPanelTable.add(textPane);
}
}
}

[r035198x]

I'm trying to display a grid of TextPane's that are sized to fit a JPanel i've drawn into a Dialog class, the number of 'Cells' are entered into JTextFields and when the appropriate button is hit this method is executed. Each TextPane is stored as an object in the aray tableGrid. The code compiles fine, but when executed the JPanel remains blank.

I've created did using a book that explains it in AWT and i'm using SWING but so far as i can tell this should work for SWING too

Any help would be much appreciated.

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

//Parse all user input values for Table generation
rows = Integer.parseInt(jTextFieldRows.getText());
cols = Integer.parseInt(jTextFieldCols.getText());
width = Integer.parseInt(jTextFieldWidth.getText());
border = Integer.parseInt(jTextFieldBorder.getText());

//instantiate objects
int rowHeight = 500/rows;
int colWidth = 700/cols;
String labelString;
tableGrid = new Object[cols][rows];

for (int y=0; y<rows; y++);
{
for (int x=0; x<cols; x++);
{
labelString = "jTextPain"+x+y;
JTextPane textPane = new JTextPane();
tableGrid[x][y] = textPane;
textPane.setSize(colWidth, rowHeight);
textPane.setName(labelString);

}
}

jPanelTable.setLayout(new GridLayout(rows,cols));
//Pack the panel with the objects
for (int y=0; y<rows; y++);
{
for (int x=0; x<cols; x++);
{
JTextPane textPane = (JTextPane) tableGrid[x][y];
jPanelTable.add(textPane);
}
}
}

after adding new components to a Frame/Panel, you need to call repaint for the changes to become visible.

[davedwm]

after adding new components to a Frame/Panel, you need to call repaint for the changes to become visible.

the idea of this function is to fill the panel with text boxes that are spaced apart, in the form of a grid specified by the number of rows and cols, stored as ints, their width is calculated so they are reduced to fit the more there are, however when drawn in the panel they appear a bit of a mess and its hard to see the arrangement, any advice on errors in the code would be appreciated.

Thanks

[davedwm]

the idea of this function is to fill the panel with text boxes that are spaced apart, in the form of a grid specified by the number of rows and cols, stored as ints, their width is calculated so they are reduced to fit the more there are, however when drawn in the panel they appear a bit of a mess and its hard to see the arrangement, any advice on errors in the code would be appreciated.

Thanks

Seem's to work but there is no spacing, the textpanes could be set too big, but with the parameters i have set they shouldn't be.

Also even with the same numbers of rows and cols specified, each time the generate button is pressed, different numbers of text boxes appear, does this mean the array needs to be emptied? tho if the figures are the same i would presume it would just overwrite the old entries.

[davedwm]

Seem's to work but there is no spacing, the textpanes could be set too big, but with the parameters i have set they shouldn't be.

Also even with the same numbers of rows and cols specified, each time the generate button is pressed, different numbers of text boxes appear, does this mean the array needs to be emptied? tho if the figures are the same i would presume it would just overwrite the old entries.

OK the last two posts can be pretty much ignored having played round with the grid layout parameters i've selected a gap between the text boxes which show how they appear, which i muist say doesn't work correctly, with the below code, the text boxes add them selves to the panel one by one, each time the method is executed the loop doesn't not seem to follow through and each text box prints the contents which tells me there must be a problem with the loop and the x and y variables which i cannot pinpoint,

any help greatly appreciated.

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

//Parse all user input values for Table generation
rows = Integer.parseInt(jTextFieldRows.getText());
cols = Integer.parseInt(jTextFieldCols.getText());
width = Integer.parseInt(jTextFieldWidth.getText());
border = Integer.parseInt(jTextFieldBorder.getText());

//instantiate objects
int rowHeight = 500/rows;
int colWidth = 700/cols;
String labelString;
tableGrid = new Object[cols][rows];
jPanelTable.setLayout(new GridLayout(rows,cols,5,5));


for (int y=0; y<rows; y++);
{
for (int x=0; x<cols; x++);
{

labelString = "jTextPain "+x+y;
JTextPane textPane = new JTextPane();
tableGrid[x][y] = textPane;
textPane.setSize(colWidth, rowHeight);
textPane.setName(labelString);
textPane.setText(labelString);
jPanelTable.add(textPane);

}
}


jPanelTable.repaint();

}

[davedwm]

AHAHAHA

; at the end of the For loop statement.

:-)

thanks for the help

Any tips on how to clear the panel? when you run the method again the Panel gets double packed.

[davedwm]

jPanelTable.removeAll();

:-)