In javaFx, treetableView, we can hide or show columns using "+" i.e
setTableMenuButtonVisible(true) symbol
say I have 10 columns in treetableview, but i have shown only 5, How can my program get count of only those columns which are visible (i.e 5 in this case)
U can have something like
ObservableList<TableColumn> visibleColumnList =FXCollections.observableArrayList();
ObservableList<TableColumn > tableColumnList = tableView.getColumns();
for (int j = 0; j < tableColumnList.size(); j++) {
TableColumn tableCol = tableColumnList.get(j);
if (tableCol.isVisible())
visibleColumnList.add(tableCol);
}
Long count = visibleColumnList.size();
Thanks Dev for your answer, though tableCol.isVisible method doesnt works for me, but i got it done other way round.
int count=0;
for (int j = 0; j < ltpSystemViewer.getTable().getColumnCount(); j++) {
TableColumn tableCol = ltpSystemViewer.getTable().getColumn(j);
if (tableCol.getWidth()>0)
count++;
}
return count;
Related
I have a problem when I'm trying to a loop in a DataTable that a dataset contains.
I'm doing a loop like this:
for(int i = 0; i<ds.Tables[0].Rows.Count - 1 ; i++)
The problem is that I can't get the value of the last line with this one, but if I try to get rid of the "-1" and do a loop on the whole table, I'll have an out of range exception.
This out of range exception is because I have to check if the value of a line "i" is equal to the value of a line "i+1", like this:
if (ds.Tables[0].Rows[i]["Release_No"] != ds.Tables[0].Rows[i + 1]["Release_No"])
So if I do it in a loop, when the index is on the last line it will check if the last line is equal to i+1, and it's out of the table.
So I was trying to check if the index is on the last line, then just get the value of the last line, but it seems like it doesn't work.
if(ds.Tables[0].Rows.IndexOf(ds.Tables[0].Rows[i]) == ds.Tables[0].Rows.Count)
If anyone has an idea, let me know, and of course if it is not clear enough let me know, I'll give more information and more code.
Thanks for your help and your time!
Check if it's the last record, first.
I like to refactor code to read as close to sentence form as possible, explaining what you want it to do using named variables and methods, and that often gets me unlocked.
Try to make each line of code do one thing, and one thing only, like check if it is the last row:
var data = ds.Tables[0].Rows;
var lastRow = data.Count - 1;
for(int i = 0; i < lastRow ; i++)
{
if (i == lastRow){
// This is the last row. Handle the last row here.
}
else
{
// Handle all other rows here
var currentRecord = data[i];
var nextRecord = data[i + 1];
if (currentRecord["Release_No"] != nextRecord["Release_No"])
{
// Handle unique Releases...
}
}
}
Use less than or equal to like this
for(int i = 0; i<=ds.Tables[0].Rows.Count - 1 ; i++)
I hope this may get what you want.
Something like this is better ?
var lastRow = data.Count - 1;
var data = ds.Tables[0].Rows;
for(int i = 0; i< lastRow; i++)
{
testFirstCum = Convert.ToInt32(ds.Tables[0].Rows[i]["EDI_Accum_Quantity"]);
if ( i == lastRow)
{
if (DBNull.Value.Equals(data[i]))
{
quantity = 0;
}
else
{
quantity = Convert.ToInt32(data[i]);
testFirstCum = testFirstCum + quantity;
System.Diagnostics.Debug.WriteLine(quantity);
System.Diagnostics.Debug.WriteLine(testFirstCum);
}
}
else
{
var col = ds.Tables[0].Columns;
var currentRecord = data[i];
var nextRecord = data[i + 1];
if(currentRecord["Release_No"] != nextRecord["Release_No"])
{
for (int j = col[2].Ordinal; j < col.Count; j++)
{
if (DBNull.Value.Equals(data[i][j]))
{
quantity = 0;
}
else
{
quantity = Convert.ToInt32(data[i][j]);
testFirstCum = testFirstCum + quantity;
System.Diagnostics.Debug.WriteLine(quantity);
System.Diagnostics.Debug.WriteLine(testFirstCum);
}
}
}
}
}
I have a QTableWidget with some columns and rows and want to add a filter for a particular column.
For that, I've added a QLineEdit in my Window.
I'm already able to filter the rows, when I add only one number in the QLineEdit:
for(int i=0; i<tableWidget->rowCount(); i++)
{
if(!tableWidget->item(i, column)->text().contains(lineEdit->text()))
{
tableWidget->hideRow(i);
}
}
(The slot is connected to the textEdited-Signal of the LineEdit)
What I want to do now:
When I write something like this in the QLineEdit: 10-30; Hide all rows, which doesnt have the number between 10 and 30 (>=10; <=30).
Somebody has an idea, how I can solve this?
This is my decision.
Check if lineEdit text contains two numbers.
QString test = ui->lineEdit->text();
QStringList lst = test.split('-');
if (lst.size() == 2)
Transform they in to integers.
int low = QString(lst[0]).toInt(), high = QString(lst[1]).toInt();
Now let's go to tableWidget and drop in less than or equal to these two numbers.
for (int i = 1; i <= 100; i++) {
int row = ui->tableWidget->rowCount();
ui->tableWidget->insertRow(row);
ui->tableWidget->setItem(row, 0, new QTableWidgetItem(QString::number(i)));
}
connect(ui->lineEdit, &QLineEdit::textChanged, this, [=](const QString &test) {
QStringList lst = test.split('-');
if (lst.size() == 2) {
int low = QString(lst[0]).toInt(), high = QString(lst[1]).toInt();
for (int i = 0; i < ui->tableWidget->rowCount(); i++) {
int temp = ui->tableWidget->item(i, 0)->text().toInt();
if (temp < low || temp > high) {
ui->tableWidget->hideRow(i);
} else {
ui->tableWidget->showRow(i);
}
}
}
});
say I have a 1D array like
int[] array1d = {1,2,3}
I would like to convert it into 2D array2d[3][2] which holding 2 int that are different. E.g.:
1 2
1 3
2 3
currently I made this
int[] array1d = new int[3];
array1d[0] = 1;
array1d[1] = 2;
array1d[2] = 3;
int[][] array2d = new int[3][2];
for (int i=0; i<3; i++) {
for (int j=0; j<2; j++) {
array2d[i][j] = array1d[j];
}
}
but it gives me only 1,2.
Generally speaking, what you want is called combinations (in your example, of size 2 taken from a 3-sized array). So, order does not matter (e.g. [1, 2] equals [2, 1]).
As already specified in the comments, you should consider a more general solution and one can be found here. Besides the actual code, you will also find a code reviews from Codereview community.
i have done this using random numbers.try this code
` import java.util.Random;
public final class RandomInteger {
public static void main(String... aArgs){
Random randomGenerator = new Random();
int[] array1d = new int[3];
array1d[0] = 1;
array1d[1] = 2;
array1d[2] = 3;
int[] array2d = new int[3][2];
int randomInt;
for (int i=0; i<3; i++) {
for (int j=0; j<2; j++) {
randomInt = randomGenerator.nextInt(3);
array2d[i][j] = array1d[randomInt];
}
}
}
}
`
I am trying to make a map by reading a text file line by line (because i cant find how to do that word by word). So I make a map00.txt that looks like "33000000111" (every number is one row, first 2 rows are number of columns and rows so matrix that I load it into looks like
000
000
111
). Now I am supposed to draw 3 tiles at the bottom (1=draw tile). I do so by drawing tile at its position in matrix * window height(width) / matrix number of rows(columns).
PROBLEM: i cant get the right parameters for current window width and height.
Code for loading tiles:
public int[,] LoadMatrix(string path)
{
StreamReader sr = new StreamReader(path);
int[,] a = new int[int.Parse(sr.ReadLine().ToString()),
int.Parse(sr.ReadLine().ToString())];
for(int i = 0; i < a.GetLength(0); i++)
for (int j = 0; j < a.GetLength(1); j++)
{ a[i, j] =int.Parse(sr.ReadLine().ToString()); }
sr.Close();
return a;
}
Code for drawing tiles:
public void DrawTiles(SpriteBatch sp, GraphicsDeviceManager gdm)
{
for(int i = 0; i < matrix.GetLength(0); i++)
for(int j = 0; j < matrix.GetLength(1); j++)
{
if (i == 1)
{
sp.Draw(tile,
new Rectangle(j * (gdm.PreferredBackBufferWidth / 3),//matrix.GetLength(1),
i * (gdm.PreferredBackBufferWidth / 3),//matrix.GetLength(0),
gdm.PreferredBackBufferWidth / matrix.GetLength(1),
gdm.PreferredBackBufferHeight / matrix.GetLength(0)),
Color.White);
}
}
}
but the result is that they are drawn about 40 pixels above the bottom of the screen!
and i tried with GraphicsAdapter.DefaultAdapter.CurrentDisplayMode.Height(Width) but i get the same result. And when i put calculated numbers that should (in theory) be width/columns and heigth/rows i get what i want. So any suggestions would be VERY appriciated because i am stuck at this for a long time on google and Stack Overflow.
Here is a reworked version of your Draw code, which should work:
public void DrawTiles(SpriteBatch sp, GraphicsDeviceManager gdm)
{
//You would typically pre-compute these in a load function
int tileWidth = gdm.PreferredBackBufferWidth / matrix.GetLength(0);
int tileHeight = gdm.PreferredBackBufferWidth / matrix.GetLength(1);
//Loop through all tiles
for(int i = 0; i < matrix.GetLength(0); i++)
{
for(int j = 0; j < matrix.GetLength(1); j++)
{
//If tile value is not 0
if (matrix[i,j] != 0)
{
sp.Draw(tile, new Rectangle(i * tileWidth, j * tileHeight, tileWidth, tileHeight), Color.White);
}
}
}
}
I need to create an asp.net page that auto generate a brackets tournament tennis style.
Regarding the managing of match in database, it's not a problem.
The problem is the dynamic graphics creation of brackets.
The user will be able to create tournament by 2-4...32 players.
And i don't know ho to create the graphics bracket in html or gdi...
Using Silverlight, and a Grid, You can produce something like this:
To do it, define a regular UserControl containing a Grid. (This is the default when you build a silverlight app in VS2008 with the Silverlight 3.0 SDK).
Then, add a call to the following in the constructor for the user control:
private void SetupBracket(int n)
{
var black = new SolidColorBrush(Colors.Gray);
// number of levels, or rounds, in the single-elim tourney
int levels = (int)Math.Log(n, 2) + 1;
// number of columns in the Grid. There's a "connector"
// column between round n and round n+1.
int nColumns = levels * 2 - 1;
// add the necessary columns to the grid
var cdc = LayoutRoot.ColumnDefinitions;
for (int i = 0; i < nColumns; i++)
{
var cd = new ColumnDefinition();
// the width of the connector is half that of the regular columns
int width = ((i % 2) == 1) ? 1 : 2;
cd.Width = new GridLength(width, GridUnitType.Star);
cdc.Add(cd);
}
var rdc = LayoutRoot.RowDefinitions;
// in the grid, there is one row for each player, and
// an interleaving row between each pair of players.
int totalSlots = 2 * n - 1;
for (int i = 0; i < totalSlots; i++)
{
rdc.Add(new RowDefinition());
}
// Now we have a grid of the proper geometry.
// Next: fill it.
List<int> slots = new List<int>();
ImageBrush brush = new ImageBrush();
brush.ImageSource = new BitmapImage(new Uri("Bridge.png", UriKind.Relative));
// one loop for each level, or "round" in the tourney.
for (int j = 0; j < levels; j++)
{
// Figure the number of players in the current round.
// Since we insert the rounds in the reverse order,
// think of j as the "number of rounds remaining."
// Therefore, when j==0, playersThisRound=1.
// When j == 1, playersThisRound = 2. etc.
int playersThisRound = (int)Math.Pow(2, j);
int x = levels - j;
int f = (int)Math.Pow(2, x - 1);
for (int i = 0; i < playersThisRound; i++)
{
// do this in reverse order. The innermost round is
// inserted first.
var r = new TextBox();
r.Background = black;
if (j == levels - 1)
r.Text = "player " + (i + 1).ToString();
else
r.Text = "player ??";
// for j == 0, this is the last column in the grid.
// for j == levels-1, this is the first column.
// The grid column is not the same as the current
// round, because of the columns used for the
// interleaved connectors.
int k = 2 * (x - 1);
r.SetValue(Grid.ColumnProperty, k);
int m = (i * 2 + 1) * f - 1;
r.SetValue(Grid.RowProperty, m);
LayoutRoot.Children.Add(r);
// are we not on the last round?
if (j > 0)
{
slots.Add(m);
// Have we just inserted two rows? Then we need
// a connector between these two and the next
// round (the round previously added).
if (slots.Count == 2)
{
string xamlTriangle = "<Path xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' "+
"xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' " +
"Data='M0,0 L 100 50 0 100 Z' Fill='LightBlue' Stretch='Fill'/>";
Path path = (Path)System.Windows.Markup.XamlReader.Load(xamlTriangle);
path.SetValue(Grid.ColumnProperty, 2 * (x - 1) + 1);
path.SetValue(Grid.RowProperty, slots[0]);
path.SetValue(Grid.RowSpanProperty, slots[1] - slots[0] + 1);
this.LayoutRoot.Children.Add(path);
slots.Clear();
}
}
}
}
}
In the above, the connector is just an isosceles triangle, with the apex pointing to the right. It is generated by XamlReader.Load() on a string.
You would also want to pretty it up, style it with different colors and fonts, I guess.
You can insert this silverlight "user control" into any HTML web page, something like embedding a flash app into a page. There are silverlight plugins for IE, Firefox, Opera, Safari, and Chrome.
If you don't want to use Silverlight, you could use a similar approach to construct an HTML table.