/// <summary>Deletes the specified node.</summary>
/// <param name="nodePath">The node path.</param>
public void Delete(string nodePath)
{
TreeIter node = FindNode(nodePath);
// We will typically be deleting the currently selected node. If this is the case,
// Gtk will not automatically move the cursor for us.
// We need to work out where we want selection to be after this node is deleted
TreePath cursorPath;
TreeViewColumn cursorCol;
treeview1.GetCursor(out cursorPath, out cursorCol);
TreeIter nextSel = node;
TreePath pathToSelect = treemodel.GetPath(node);
if (pathToSelect.Compare(cursorPath) != 0)
{
pathToSelect = null;
}
else if (!treemodel.IterNext(ref nextSel)) // If there's a "next" sibling, the current TreePath will do
{ // Otherwise
if (!pathToSelect.Prev()) // If there's a "previous" sibling, use that
{
pathToSelect.Up(); // and if that didn't work, use the parent
}
}
treemodel.Remove(ref node);
if (pathToSelect != null)
{
treeview1.SetCursor(pathToSelect, treeview1.GetColumn(0), false);
}
}
public override bool PathIsSelected(TreePath path)
{
if (path != null && selected_path != null)
{
return(path.Compare(selected_path) == 0);
}
return(false);
}
private void DrawCell(TreePath path, GridViewColumn col,
Rectangle clip)
{
Widget w;
Rectangle rect = CellRect(path, col, out w);
if (!clip.Intersect(rect, out clip))
{
return;
}
CellRendererState crs = 0;
if (w != fda)
{
w.GdkWindow.DrawRectangle(w.Style.MidGC(w.State), true,
rect);
}
else
{
TreePath spath;
GridViewColumn scol;
selection.GetSelected(out spath, out scol);
if (spath != null && path.Compare(spath) == 0 && col == scol)
{
crs = CellRendererState.Selected;
Style.PaintFlatBox(w.Style, w.GdkWindow,
StateType.Selected, ShadowType.None,
clip, this, "cell_odd", rect.X, rect.Y,
rect.Width, rect.Height);
}
}
w.GdkWindow.DrawLine(w.Style.BackgroundGC(w.State),
rect.X, rect.Bottom - 1,
rect.Right, rect.Bottom - 1);
w.GdkWindow.DrawLine(w.Style.BackgroundGC(w.State),
rect.Right - 1, rect.Y,
rect.Right - 1, rect.Bottom);
TreeIter i;
bool header = path.Indices[0] < c_span;
CellRenderer renderer = header && col.HeaderRenderer != null ?
col.HeaderRenderer : col.FieldRenderer;
model.GetIter(out i, path);
col.CellSetCellData(model, i, header);
renderer.Render(w.GdkWindow, this, rect, rect, clip, crs);
}
/* private methods */
private bool SelectPointHelper(int x, int y, bool select)
{
TreeIter iter = TreeIter.Zero;
if (!GetPointNear(x, y, out iter))
{
return(false);
}
TreePath path = model.GetPath(iter);
// always focus
focused_path = path.Copy();
if (select)
{
// fire SelectionChanged if the
// selection has actually
// changed
if (selected_path == null ||
path.Compare(selected_path) != 0)
{
selected_path = path.Copy();
if (SelectionChanged != null)
{
SelectionChanged(this, new EventArgs());
}
}
}
else
{
// deselect if we previously
// had a selection
if (selected_path != null)
{
selected_path = null;
if (SelectionChanged != null)
{
SelectionChanged(this, new EventArgs());
}
}
}
// always fire PointActivated
if (PointActivated != null)
{
PointActivated(this, model, iter);
}
return(true);
}
/// <summary>Deletes the specified node.</summary>
/// <param name="nodePath">The node path.</param>
public void Delete(string nodePath)
{
TreeIter node = FindNode(nodePath);
if (node.Equals(TreeIter.Zero))
{
return;
}
// We will typically be deleting the currently selected node. If this is the case,
// Gtk will not automatically move the cursor for us.
// We need to work out where we want selection to be after this node is deleted
TreePath cursorPath;
TreeViewColumn cursorCol;
treeview1.GetCursor(out cursorPath, out cursorCol);
TreeIter nextSel = node;
TreePath pathToSelect = treemodel.GetPath(node);
if (pathToSelect.Compare(cursorPath) != 0)
{
pathToSelect = null;
}
else if (treemodel.IterNext(ref nextSel)) // If there's a "next" sibling, the current TreePath will do
{
pathToSelect = treemodel.GetPath(nextSel);
}
else
{ // Otherwise
if (!pathToSelect.Prev()) // If there's a "previous" sibling, use that
{
pathToSelect.Up(); // and if that didn't work, use the parent
}
}
// Note: gtk_tree_store_remove() seems quite slow if the node being
// deleted is selected. Therefore, we select the next node *before*
// deleting the specified node.
if (pathToSelect != null)
{
treeview1.SetCursor(pathToSelect, treeview1.GetColumn(0), false);
}
treemodel.Remove(ref node);
}
protected virtual int HandleSort(TreeModel model, TreeIter a, TreeIter b)
{
if (a.Equals(TreeIter.Zero) && b.Equals(TreeIter.Zero))
{
return(0);
}
else if (a.Equals(TreeIter.Zero))
{
return(-1);
}
else if (b.Equals(TreeIter.Zero))
{
return(1);
}
TreePath pathA = model.GetPath(a);
TreePath pathB = model.GetPath(b);
return(pathA.Compare(pathB));
}
public override void FocusIter(TreeIter iter)
{
if (!CanFocus)
{
return;
}
TreePath path = model.GetPath(iter);
if (focused_path != null &&
path.Compare(focused_path) == 0)
{
return;
}
focused_path = path;
if (Changed != null)
{
Changed(this, new EventArgs());
}
}
public override void SelectIter(TreeIter iter)
{
TreePath path = model.GetPath(iter);
if (selected_path != null &&
path.Compare(selected_path) == 0)
{
return;
}
selected_path = path;
if (Changed != null)
{
Changed(this, new EventArgs());
}
if (SelectionChanged != null)
{
SelectionChanged(this, new EventArgs());
}
}
private void OnDataRowDeleted(object o, RowDeletedArgs args)
{
if (model == null || args.Path == null)
{
return;
}
bool sel_paths_changed = false;
// Don't update the real n_cells, as doing this will
// throw off ScrollToPath if called before SizeAllocate
// is run
int n_cells = model.IterNChildren();
for (int i = 0; i < selected_paths.Count; i++)
{
TreePath path = (TreePath)selected_paths[i];
int cmp = path.Compare(args.Path);
if (cmp == 0)
{
selected_paths.RemoveAt(i);
i--;
sel_paths_changed = true;
continue;
}
// decrement each path that follows the one we
// just deleted
if (cmp > 0)
{
path.Prev();
selected_paths[i] = path;
continue;
}
}
if (sel_paths_changed && SelectionChanged != null)
{
SelectionChanged(this, new EventArgs());
}
if (focused_path != null &&
focused_path.Equals(args.Path))
{
focused_path = focused_path.Copy();
// try to advance the focus forward
focused_path.Next();
if (!PathIsValid(focused_path, n_cells) &&
!focused_path.Prev())
{
focused_path = null;
}
}
if (selection_anchor != null &&
selection_anchor.Equals(args.Path))
{
selection_anchor = null;
}
QueueResize();
}
/// <summary>Checks whether two path are equal. They are considered equal if they have the same indice.</summary>
public static bool PathsAreEqual(TreePath path1, TreePath path2)
{
return(path1.Compare(path2) == 0);
}
private void FocusHelper(bool move_next)
{
if (focused_path == null)
{
return;
}
TreeIter focused_iter;
if (!model.GetIter(out focused_iter, focused_path))
{
return;
}
int focus_x, focus_y;
GetPlotPoint(focused_iter, out focus_x, out focus_y);
// we can't just do focused_path.Prev () since there is
// a disconnect between the order in the model and
// where the axis has us place points. besides, we
// need to clamp the focus region to the zoom rect.
TreeIter iter;
if (!model.GetIterFirst(out iter))
{
return;
}
int total_height = (Allocation.Y + Allocation.Height);
TreePath min_path = null;
int min_x_delta = Int32.MaxValue;
int min_y_delta = Int32.MaxValue;
do
{
TreePath path = model.GetPath(iter);
// don't try to focus the same point again
if (path.Compare(focused_path) == 0)
{
continue;
}
int x, y;
GetPlotPoint(iter, out x, out y);
// if its out of bounds, throw it out
if (IsBarOutOfBounds(x, y))
{
continue;
}
int x_delta = 0, y_delta = 0;
if (move_next)
{
// find the bar with the smallest positive x
// delta, and smallest y, or if there
// is a tie, the one that's larger on the y
// axis
x_delta = x - focus_x;
y_delta = (focus_x != x) ? total_height - y : focus_y - y;
}
else
{
// find the bar with the smallest positive x
// delta, and largest y, or if there
// is a tie, the one that's larger on the y
// axis
x_delta = focus_x - x;
y_delta = (focus_x != x) ? y : y - focus_y;
}
// don't go backward, and don't pick a bigger
// delta than we already have
if (x_delta < 0 ||
x_delta > min_x_delta)
{
continue;
}
if (x_delta == min_x_delta &&
y_delta >= min_y_delta)
{
continue;
}
// if we're at the same X value, make sure
// we're moving forward in the y direction so
// we don't get stuck in loops
if (x_delta == 0 &&
y_delta < 0)
{
continue;
}
min_x_delta = x_delta;
min_y_delta = y_delta;
min_path = path;
} while (model.IterNext(ref iter));
if (min_path != null)
{
focused_path = min_path;
}
else
{
if (move_next)
{
focused_path = TreePath.NewFirst();
}
else
{
focused_path = new TreePath(new int[] {
model.IterNChildren() - 1
});
}
}
if (Changed != null)
{
Changed(this, new EventArgs());
}
}
public void FocusPrev()
{
if (!has_focus || focused_plots.Count == 0)
{
return;
}
// get the focused value for the first plot
LinePlot focus_plot = (LinePlot)focused_plots[0];
TreeModel model;
TreeIter focus_iter;
if (!focus_plot.GetFocused(out model, out focus_iter))
{
return;
}
if (x_axis == null || y_axis == null)
{
return;
}
int focus_x, focus_y;
GetPlotPoint(focus_plot, focus_iter,
out focus_x, out focus_y);
// scour the rest of the plots, searching for values
// with a small (negative) delta to min_x
int min_delta = Int32.MaxValue;
ArrayList min_delta_plots = new ArrayList();
ArrayList min_delta_iters = new ArrayList();
foreach (LinePlot plot in plots)
{
TreeIter iter;
if (!plot.Model.GetIterFirst(out iter))
{
break;
}
TreeModel plot_model;
TreePath plot_focus_path = null;
TreeIter plot_focus_iter = TreeIter.Zero;
if (plot.HasFocus &&
plot.GetFocused(out plot_model, out plot_focus_iter))
{
plot_focus_path = model.GetPath(plot_focus_iter);
}
TreeIter prev_iter = TreeIter.Zero;
do
{
TreePath path = plot.Model.GetPath(iter);
int x, y;
if (!GetPlotPoint(plot, iter, out x, out y))
{
continue;
}
// stop when we hit the currently
// focused point, if we had focus
if (plot_focus_path != null)
{
if (path.Compare(plot_focus_path) == 0)
{
break;
}
}
else if (x >= focus_x)
{
// or stop when we've hit
// focus_x, or the nearest
// point to it
break;
}
prev_iter = iter;
} while (plot.Model.IterNext(ref iter));
// point must have been the first one
if (prev_iter.Equals(TreeIter.Zero))
{
continue;
}
// now, we're at the point right before the
// last focused point, so find the minimal x
// delta
int prev_x, prev_y;
GetPlotPoint(plot, prev_iter,
out prev_x, out prev_y);
int delta = focus_x - prev_x;
if (delta > min_delta)
{
continue;
}
if (delta < min_delta)
{
min_delta_plots.Clear();
min_delta_iters.Clear();
}
min_delta = delta;
min_delta_plots.Add(plot);
min_delta_iters.Add(prev_iter);
}
if (min_delta_plots.Count == 0)
{
FocusLast();
return;
}
FocusIters(min_delta_plots, min_delta_iters);
}
// XXX: this code assumes that the model is sorted
public void FocusNext()
{
if (!has_focus || focused_plots.Count == 0)
{
return;
}
// get the focused value for the first plot
LinePlot focus_plot = (LinePlot)focused_plots[0];
TreeModel model;
TreeIter focus_iter;
if (!focus_plot.GetFocused(out model, out focus_iter))
{
return;
}
if (x_axis == null || y_axis == null)
{
return;
}
int focus_x, focus_y;
GetPlotPoint(focus_plot, focus_iter,
out focus_x, out focus_y);
// scour the rest of the plots, searching for values
// with a small delta to min_x
int min_delta = Int32.MaxValue;
ArrayList min_delta_plots = new ArrayList();
ArrayList min_delta_iters = new ArrayList();
foreach (LinePlot plot in plots)
{
TreeIter iter;
if (!plot.Model.GetIterFirst(out iter))
{
break;
}
TreeModel plot_model;
TreePath plot_focus_path = null;
TreeIter plot_focus_iter = TreeIter.Zero;
if (plot.HasFocus &&
plot.GetFocused(out plot_model, out plot_focus_iter))
{
plot_focus_path = plot.Model.GetPath(plot_focus_iter);
}
do
{
TreePath path = plot.Model.GetPath(iter);
int x, y;
if (!GetPlotPoint(plot, iter, out x, out y))
{
continue;
}
// ensure that we always pick points
// after the previously focused point,
// if this plot had focus
if (plot_focus_path != null &&
path.Compare(plot_focus_path) != 1)
{
continue;
}
// continue walking until p_x >= x
if (x < focus_x)
{
continue;
}
// now, we're at the point right of the
// last focused point, so find the
// minimal x delta
int delta = x - focus_x;
if (delta > min_delta)
{
continue;
}
if (delta < min_delta)
{
min_delta_plots.Clear();
min_delta_iters.Clear();
}
min_delta = delta;
min_delta_plots.Add(plot);
min_delta_iters.Add(iter);
break;
} while (plot.Model.IterNext(ref iter));
}
// we must be at the end
if (min_delta_plots.Count == 0)
{
FocusFirst();
return;
}
FocusIters(min_delta_plots, min_delta_iters);
}
private void FindPointsInRange(IAxis x_axis, IAxis y_axis, out Point[] points)
{
points = new Point[0];
if ((x_axis == null || !x_axis.HasValidRange) ||
(y_axis == null || !y_axis.HasValidRange))
{
// we need both axes to be valid to draw anything
return;
}
ArrayList points_list = new ArrayList();
TreeIter iter;
if (!model.GetIterFirst(out iter))
{
return;
}
Point prev_point = null;
do
{
IComparable x_val, y_val;
if (!GetValue(iter, 0, out x_val) ||
!GetValue(iter, 1, out y_val))
{
continue;
}
// don't clip a gapped point
if (PointGapFunc != null &&
PointGapFunc(model, iter))
{
if (x_axis.IsInRange(x_val))
{
Point p = new Point(x_axis.ValueToGridCoords(x_val),
y_axis.ValueToGridCoords(y_val),
x_val, y_val);
p.IsAGap = true;
points_list.Add(p);
}
continue;
}
// create a line segment between the previous
// point and the current point and see if the
// segment intersects the viewing plane
Point b = new Point(x_axis.ValueToGridCoords(x_val),
y_axis.ValueToGridCoords(y_val),
x_val, y_val);
Point a = new Point(b.X, b.Y, b.XValue, b.YValue);
if (prev_point != null)
{
a = prev_point;
}
// copy b before it becomes clipped
prev_point = b.Clone() as Point;
TreePath path = model.GetPath(iter);
if (selected_path != null &&
selected_path.Compare(path) == 0)
{
b.IsSelected = true;
}
if (focused_path != null &&
focused_path.Compare(path) == 0)
{
b.IsFocused = true;
}
if (ClipSegment(x_axis, y_axis, ref a, ref b))
{
if (a != b && a.IsClipped)
{
points_list.Add(a);
}
points_list.Add(b);
}
} while (model.IterNext(ref iter));
// Sort this list on the x axis
points_list.Sort(new PointXAxisIComparer());
points = (Point[])points_list.ToArray(typeof(Point));
}
