Re: Retrieving Column Data from a ListStore?

[number via Digitalmars-d-learn]

On Thursday, 25 April 2019 at 15:16:03 UTC, Ron Tarrant wrote:

On Thursday, 25 April 2019 at 11:29:04 UTC, number wrote:

I'm trying to do it with multi-selection. It works now but I 
wonder if it's right to just create a dummy TreeModelIF to 
call getSelectedRows()? Same question for creating a TreeIter 
to call getIter()?


Whatever works, I guess. Just looking over what you've got, I 
don't really see anyway around creating the dummy for either 
one since they each have to be passed into functions.


I wasn't sure if it wants the actual tree model used with the 
tree view, but passing my treeStore didn't work, so I used a 
dummy. Don't know what it's for though.

Re: Retrieving Column Data from a ListStore?

[Ron Tarrant via Digitalmars-d-learn]

On Thursday, 25 April 2019 at 11:29:04 UTC, number wrote:

I'm trying to do it with multi-selection. It works now but I 
wonder if it's right to just create a dummy TreeModelIF to call 
getSelectedRows()? Same question for creating a TreeIter to 
call getIter()?


Whatever works, I guess. Just looking over what you've got, I 
don't really see anyway around creating the dummy for either one 
since they each have to be passed into functions.

Re: Retrieving Column Data from a ListStore?

[number via Digitalmars-d-learn]

On Wednesday, 24 April 2019 at 18:56:50 UTC, Ron Tarrant wrote:


For anyone else who comes along looking for the same answer, 
here's what I did:




I'm trying to do it with multi-selection. It works now but I 
wonder if it's right to just create a dummy TreeModelIF to call 
getSelectedRows()? Same question for creating a TreeIter to call 
getIter()?


```
import std.stdio;

import gtk.Main;
import gtk.MainWindow;
import gtk.TreeView;
import gtk.CellRendererText;
import gtk.TreeViewColumn;
import gtk.ListStore;
import gtk.TreeStore;
import gtk.TreeIter;
import gtk.TreeSelection;
import gtk.TreePath;

void main(string[] args)
{
Main.init(args);

MainWindow window = new MainWindow("title");
window.setSizeRequest(400, 200);

TreeView treeView = new TreeView();

CellRendererText cellRendererText;
TreeViewColumn treeViewColumn;

CellRendererText cellRendererTextA = new CellRendererText();
CellRendererText cellRendererTextB = new CellRendererText();
treeViewColumn = new TreeViewColumn();
treeViewColumn.setTitle("A and B");
treeViewColumn.packStart(cellRendererTextA, true);
treeViewColumn.packStart(cellRendererTextB, true);
treeViewColumn.addAttribute(cellRendererTextA, "text", 0);
treeViewColumn.addAttribute(cellRendererTextB, "text", 1);
treeView.appendColumn(treeViewColumn);

cellRendererText = new CellRendererText();
	treeViewColumn = new TreeViewColumn("C", cellRendererText, 
"text", 2);

treeView.appendColumn(treeViewColumn);

	//ListStore listStore = new ListStore([GType.STRING, 
GType.STRING, GType.STRING]);
	TreeStore treeStore = new TreeStore([GType.STRING, GType.STRING, 
GType.STRING]);

treeView.setModel(treeStore);

TreeIter treeIter;

treeIter = treeStore.createIter();
treeStore.setValue(treeIter, 0, "a");
treeStore.setValue(treeIter, 1, "b");
treeStore.setValue(treeIter, 2, "c");

treeIter = treeStore.createIter();
treeStore.setValue(treeIter, 0, "a2");
treeStore.setValue(treeIter, 1, "b2");
treeStore.setValue(treeIter, 2, "c2");

TreeSelection treeSelection = treeView.getSelection();
treeSelection.setMode(SelectionMode.MULTIPLE);
	treeSelection.addOnChanged(delegate void(TreeSelection 
treeSelection) {

writeln("");
if (treeSelection.getMode() == SelectionMode.MULTIPLE)
{
import gtk.TreeModelIF;
TreeModelIF tm;
//writeln(tm);
TreePath[] treePaths = 
treeSelection.getSelectedRows(tm);
writeln("nb selected: ", 
treeSelection.countSelectedRows());
if (treePaths.length)
{
foreach (i, treePath; treePaths)
{
writefln("path(%s) : %s", i, treePath);
TreeIter treeIter = new TreeIter();
treeStore.getIter(treeIter, treePath);
writefln("%s, %s, %s"
, 
treeStore.getValueString(treeIter, 0)
, 
treeStore.getValueString(treeIter, 1)
, 
treeStore.getValueString(treeIter, 2)
);
}
}
else
{
writeln("nothing");
}
}
else
{
TreeIter treeIter = treeSelection.getSelected();
if (treeIter)
{
writefln("%s, %s, %s"
, treeStore.getValueString(treeIter, 0)
, treeStore.getValueString(treeIter, 1)
, treeStore.getValueString(treeIter, 2)
);
}
else
{
writeln("nothing");
}
}
});

window.add(treeView);

window.showAll();
Main.run();
}

```

Re: Retrieving Column Data from a ListStore?

[Ron Tarrant via Digitalmars-d-learn]

On Wednesday, 24 April 2019 at 15:13:29 UTC, Mike Wey wrote:

The ListStore/TreeModel provides functions to retrieve the 
data, `gtk.TreeModelIF.TreeModelIF.getValue`.


A TreeIter indicates the row these kind of function apply to.


Well, this is embarrassing. I tried that earlier and it didn't 
work. Now it does. Go figure. (sigh)


Thanks, Mike.

For anyone else who comes along looking for the same answer, 
here's what I did:


```
void onChanged(ComboBox cb)
{
TreeIter treeIter;
TreeModelIF treeModel;
string data;

writeln("active: ", getActive());
getActiveIter(treeIter);
data = getModel().getValueString(treeIter, 1);
writeln(data);

} // onChanged()

```

Re: Retrieving Column Data from a ListStore?

[Mike Wey via Digitalmars-d-learn]

On 24-04-2019 16:38, Ron Tarrant wrote:
Another thing I've been struggling with is fetching data from a 
TreeIter. Getting the iter itself is no problem, but when it comes to 
getting the contents of a specific column within the iter, none of the 
methods I've tried have worked. In fact, it almost seems like none of 
them are implemented.


I've written a callback function named onChanged() in the MyComboBox 
class that gets the TreeIter, but that's all I can get working. If 
anyone knows how to grab data from column 2 of the iter (see the 
MyListStore class at the bottom for the structure of the store) I'd be 
ever so grateful if you could fill in whatever else would be needed in 
that callback.


Here's the code:

```
...

```


The ListStore/TreeModel provides functions to retrieve the data, 
`gtk.TreeModelIF.TreeModelIF.getValue`.


A TreeIter indicates the row these kind of function apply to.
--
Mike Wey