Develop Reference

Simulating a right click in wpf

I would like to simulate/route right click on a WPF "control".
To make a long story short. I have an Adorner which should react to left click (so is hit test visible must be true) but at the same time I would like it to be "transparent" for the right clicks. (In another words i would like for a control under it to receive this click - btw right click makes Adorner disappear).
I tried to raise MouseRightButtonUp event on control directly under mouse (after Adorner disappears but it doesn't seem to work). I would like to avoid calling system functions (like mouse_event through P/Invoke). Can it be even done in wpf?

As far as I remember, I had troubles with routing events and changing Adorners IsHitTestVisible property. The main problem was, if I recall it correctly, that adorner and controls are on different branches of visual tree, so routed events spawned on the adorner won't make it to your controls.
I can't say much without you providing the code, but the simplest thing that should work would be to find a control under your mouse position and do
private void myAdorner_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
MouseButtonEventArgs revent = new MouseButtonEventArgs(e.MouseDevice, e.Timestamp, MouseButton.Right);
revent.RoutedEvent = e.RoutedEvent;
//find you control
control.RaiseEvent(revent);
}

C# mouse events on a panel don't apply to objects in panel

I am working on a simple C# program that allows the user to use the mouse to move simple controls (Buttons, textareas, etc), similar to a visual designer like visual studio. The controls are contained in a panel and they all work as expected. However, when I call MouseDown() on the panel the controls are contained in, the event only fires when clicking on an empty part of the panel, not when I click on a Control contained within the form.
Here is my MouseDown() Code:
private void splitContainer2_Panel2_MouseDown(object sender, MouseEventArgs e)
{
Console.WriteLine("MOUSE GRABBED");
...
//More code that uses the X and Y co-ords of the mouse to check which
//Control is selected
...
}
As you can see it is very straightforward. The writeLine() is not triggered when I click on a control.
I have looked at questions such as:
ignore mouse event on label inside panel
To no avail.
Any help would be appreciated, even a better method to do what I am trying to acomplish.

Instead of using a MouseDown() event for the panel, why not trying to use the same one for every object? Based on what you are trying to do, add the following code:
Where you create each form element:
nameOfElement.MouseDown += new System.Windows.Forms.MouseEventHandler(this.splitContainer2_Panel2_Objects_MouseDown);
The mouse down method:
Control ctrl = (Control)sender;
Console.WriteLine("Moused down on: " + ctrl.Name);
//Code to manipulate mouse down
Hope this helps!

Use PreviewMouseDown. The WPF hit testing engine will not raise events on parent elements if the child element absorbs the event.

DataGridView mouse wheel scrolling stopped working

I have a DataGridView in my app and I can't scroll it using the mousewheel. It used to work fine before. I'm not sure what I have done to cause this because I only noticed it recently after I had made multiple changes to the code.
I'm not posting any code because there are more than 2k lines and I'm not sure where the error could possibly be.
Any ideas what might have caused this? If you need any code I can edit the question afterwards.

Almost certainly the problem occurs because the DataGridView has lost focus. This can be because another control on your form demands focus or your form is set by default to give a different control focus.
You can force the DataGridView to have focus. If you want to emulate the standard Microsoft Windows behavior of enabling mouse wheel scroll when the mouse is hovering over the control then just use the code below.
private void SettingsGrid_MouseEnter(object sender, EventArgs e)
{
dataGridView1.Focus();
}
If you want to scroll the grid regardless of what control has focus then the code will be similar to above with a little beak of tweaking.

Why is the tab page body not updating with a .NET tab control?

I am having a strange problem with the .NET TabControl in C# (Visual Studio 2010). Start a Windows Forms Application. Add a tab control and a button. Add two different labels to the two tab pages so you can differentiate them. The purpose of the button is just to act as a next button; subscribe to the its Click event with the code:
tabControl1.SelectTab(1);
Let's assume the user entered something wrong on the first tab, so when they try to go to the second tab we want to send them back, so subscribe to the tab control's SelectedIndexChanged event with the code:
if(tabControl1.SelectedIndex == 1)
{
tabControl1.SelectTab(0);
}
Now run the program and click the button. You will notice that as judged by the highlighted tab at the top, the first tab page is the one that appears to be selected, as you'd expect. However, as judged by the tab page that actually appears in the body of the tab control, it's still the second tab page that shows up! Calls to various controls' Focus(), Update(), and Refresh() functions don't seem to help. What is going on here?

I repro. This is a generic problem with event handlers, you can confuse the stuffing out the native Windows control by jerking the floor mat like that. TreeView is another control that's very prone to this kind of trouble.
There's an elegant and general solution for a problem like this, you can use Control.BeginInvoke() to delay the command. It will execute later after the native control is done with the event generation and all side-effects have been completed. Which solves this problem as well, like this:
private void tabControl1_SelectedIndexChanged(object sender, EventArgs e) {
if (tabControl1.SelectedIndex == 1) {
this.BeginInvoke(new Action(() => tabControl1.SelectTab(0)));
}
}

C# way to implement vertical auto-hiding tool bar

What I'm attempting to create is very similar to the "Toolbox" in VS 2008 and VS 2010. It will be on the left side of my MDI parent, and will pop out when the user hovers their mouse over it. Again, this is just like the VS Toolbox.
My question is what is the best way to implement this? Please keep in mind I am putting this on the left side of a MDI parent and am using VS 2008, C#, and .NET 3.5. In addition, I plan on putting a TreeView inside the toolbar, so whatever is used must support the addition of a TreeView object.
Thanks!

A vertical auto-hiding toolbar, from what I've gathered online and by testing, is best implemented with a ToolStrip object, docked to the left in my case. To give the appearance of a TreeView object popping out of that, add a ToolStripButton. Then, add a MouseHover Event to the ToolStripButton that makes a Panel object (that is docked to the left as well) visible. Obviously, it would be best to make the Panel object invisible by default. Then, add a MouseLeave event for the Panel so when the user leaves the Panel, the Panel then becomes invisible again or "pops" back in.
It doesn't have the nice effect of it popping out like Visual Studio 2008/2010 does, but it has the basic functionality that I need.
Here is the code for the MouseHover and MouseLeave events. Very simple.
private void openPanel1ToolStripButton_MouseHover(object sender, EventArgs e)
{
if(panel1.Visible == false)
{
panel1.Visible = true;
}
}
private void panel1_MouseLeave(object sender, EventArgs e)
{
if (panel2.Visible == true)
{
panel2.Visible = false;
}
}

Take a look at the DockPanel Suite on SourceForge. I have seen many Custom Controls on the web trying to mimic the VS Toolbar, but none work as well as this one does. It has a high user rating also.