I set my NotifyIcon of the boot form as follows:
![
]1
thinking about getting something like:
But it doesn't show me anything when I hover over the icona in the systemtray. How come? what am I wrong
The balloon is only shown when you call NotifyIcon.ShowBalloonTip(timeout), not when you hover on the system tray icon, and it uses BalloonTipText and BalloonTipTile properties. You have to handle this method in some event or function.
For example, you could do this when you minimize the form:
NotifyIcon.Visible = True
NotifyIcon.ShowBalloonTip(2000, "MyApp", "The program is still running!", ToolTipIcon.Info)
When you hover on the icon and the icon is visible, instead, only a tooltip appears. The tooltip displays the string set in the Text property and doesn't use BalloonTipText and BalloonTipTile.
So you don't have to handle the hover, the ToolTip should automatically appear.
If the issue persists, try to set Visible = False in the designer in order to see whether setting Visible = True works and make sure that there isn't any instruction that throws exception before the ShowBalloonTip method.
Related
I'm using the following code:
Dim Reply As DialogResult = MessageBox.Show("GOT IT!")
If Reply = DialogResult.OK Then '...`
When I click the Close button (red "X" in corner) the condition looking for DialogResult.OK still evaluates to true and when I check the Reply variable's value at runtime after clicking the close button it is 1 {OK}.
From the documentation on MessageBox Class it says:
Displays a message window, also known as a dialog box, which
presents a message to the user. It is a modal window, blocking other
actions in the application until the user closes it. A MessageBox can
contain text, buttons, and symbols that inform and instruct the user.
While I find the documentation on DialogBoxes a little convoluted and confusing, it appears to me (and i could be bery wrong) that the Close button should by default set the return to IDCancel which, I must assume is somehow parsed by the MessageBox class into DialogReturn.Cancel.
So why does MessageBox not show the return form the close button as DialogResult.Cancel??
This is all very confusing to me because it seems the MessageBox class is not consistent with other forms from within the same Systems.Windows.Forms namespace.
For instance, if we look at the documentation from the Form Class's .DialogResult method, it specifically tells us the return from the close button is DialogResult.Cancel:
When a form is displayed as a modal dialog box, clicking the Close
button (the button with an X in the top-right corner of the form)
causes the form to be hidden and the DialogResult property to be set
to DialogResult.Cancel.
As already stated in the comments above, you could get IDCancel result when clicking the Close Red Button, only if you add a MessageBoxButtons enum that include the Cancel option For example MessageBoxButtons.OKCancel and others.
The MessageBox.Show method is indeed a wrapper around the WinApi MessageBox function. You could see this wrapping looking at the reference sources
The behavior of MessageBox.Show is different from the link that you have pointed. That one is relative to the WinForm engine and of course the behavior of the WinForm Form class is totally managed by the library to handle the scenarios presumed for a WinForm class.
In the WinApi documentation you could find a subtle reference in the section about the Return value where they talks about the behavior when the cancel button is present. Then trial and error confirms this assumption.
You need to pass in MessageBoxButtons as an override that includes a cancel button so like MessageBoxButtons.OKCancel.
Dim message As String = "GOT IT!"
Dim caption As String = "Fancy Caption"
Dim Reply As DialogResult = MessageBox.Show(message, caption, MessageBoxButtons.OKCancel)
If Reply = DialogResult.OK Then '...`
If you dont want the caption than skip it but you'll still need a comma, like:
MessageBox.Show("GOT IT!",,MessageBoxButtons.OKCancel)
See here for full enumeration of options for MessageBoxButtons.
On my form, I have 4 RadioButtons, each with its appearance set to Button. In my program, I change each of these RadioButton's ForeColour, BackColour and AutoCheck status, as below:
ARadioButton.AutoCheck = False
ARadioButton.BackColor = Color.FromKnownColor(KnownColor.ControlLightLight)
ARadioButton.ForeColor = Color.FromKnownColor(KnownColor.ControlDark)
However, later on, I reset these properties back to default:
ARadioButton.AutoCheck = True
ARadioButton.BackColor = DefaultBackColor
ARadioButton.ForeColor = DefaultForeColor
My issue is that instead of the entire button being highlighted, only the outside is, as shown in the images below.
Originally:
After changes are made and RadioButtons reset to default using code above:
I know this may seem trivial, but I would like the entire RadioButton to be highlighted when the user clicks on the RadioButton, not just the outside.
Is there a way I could somehow reset this?
Try setting the BackColor property to Color.Transparent
Like the title says, I've got a Child form being shown with it's TopLevel property set to False and I am unable to click a MaskedTextBox control that it contains (in order to bring focus to it). I can bring focus to it by using TAB on the keyboard though.
The child form contains other regular TextBox controls and these I can click to focus with no problems, although they also exhibit some odd behavior: for example if I've got a value in the Textbox and I try to drag-click from the end of the string to the beginning, nothing happens. In fact I can't use my mouse to move the cursor inside the TextBox's text at all (although they keyboard arrow keys work).
I'm not too worried about the odd TextBox behavior, but why can't I activate my MaskedTextBox by clicking on it?
Below is the code that shows the form:
Dim newReportForm As New Form
Dim formName As String
Dim FullTypeName As String
Dim FormInstanceType As Type
formName = TreeView1.SelectedNode.Name
FullTypeName = Application.ProductName & "." & formName
FormInstanceType = Type.GetType(FullTypeName, True, True)
newReportForm = CType(Activator.CreateInstance(FormInstanceType), Form)
Try
newReportForm.Top = CType(SplitContainer1.Panel2.Controls(0), Form).Top + 25
newReportForm.Left = CType(SplitContainer1.Panel2.Controls(0), Form).Left + 25
Catch
End Try
newReportForm.TopLevel = False
newReportForm.Parent = SplitContainer1.Panel2
newReportForm.BringToFront()
newReportForm.Show()
I tried your code and got a good repro this time. As I mentioned in my original post, this is indeed a window activation problem. You can see this in Spy++, note the WM_MOUSEACTIVATE messages.
This happens because you display the form with a caption bar. That convinces the Windows window manager that the window can be activated. That doesn't actually work, it is no longer a top-level window. Visible from the caption bar, it never gets drawn with the "window activated" colors.
You will have to remove the caption bar from the form. That's best done by adding this line to your code:
newReportForm.FormBorderStyle = Windows.Forms.FormBorderStyle.None
Which will turn the form into a control that's otherwise indistinguishable from a UserControl. You can still make it distinctive by using this code instead:
newReportForm.ControlBox = False
newReportForm.Text = ""
Either fix solves the mouse click problem.
This is a miserable bug and it took me a long time to find this question. We're doing exactly the same thing as the OP, displaying a Form inside a split container. My workaround was to add an event handler to the MaskedTextBox's Click event:
private void MaskedTextBoxSetFocus(object sender, EventArgs e)
{
var mtb = (MaskedTextBox)sender;
mtb.Focus();
}
This works for the MaskedTextBox but I'm concerned about other odd behavior due to this bug so I will probably set the border style as in the accepted answer.
The text box behavior is a symptom of the same problem. Something is swallowing mouse down notifications. It isn't explained by your code snippet. Forms indeed swallow the mouse click that activates them, but that is a one-time behavior and is turned off by setting its TopLevel property to False.
Not much left. One candidate is the Control.Capture property, turned on at the MouseDown event for a button so that the button can see the MouseUp event, no matter where the mouse moved. That's a one-time effect as well. Watch out for controls that set the Focus in a MouseDown event.
The other is some kind of IMessageFilter code in your form(s) that's eating WM_LBUTTONDOWN messages.
I dynamically create buttons on a form and use the button text as ids so that I can pass that to an SQL query to pull saved data about that button when necessary, but I also use an image over buttons that have information saved about them. What I need to know is how do I keep the text on the button from appearing when there is an image assigned to that button? By default vb.net shows both the text and the image and no TextImageRelation values allow for the image to take precedence. I tried changing the text color to transparent, but the outline of the text is still visible through the image. Is there anyway to keep the text value as it is but just show the image on the button?
Don't use the .Text property of the button to store your information. Use the .Tag property for your IDs. Just set the .Text property to "" (empty string), that way it won't interfere with your image.
not sure, but why not just set the value to a variable to be passed to the SQL on the button click event and not place the text on the button? If you are using the same button click event for several buttons you could check the sender's ID and then set the variable based on that.
To Enable "Button1" Click (Visible)
Button1.Enable = True
To Disable "Button1" Click (Visible)
Button1.Enable = False
Hide "Button"
Button1.Visible = True
or
Button1.Show()
Show "Button"
Button1.Visible = False
or
Button1.Hide()
You can Also Used the code to any Tools (TextBox, Label, ComboBox, Radio Button, Button, Link, GroupBox)
I'm trying to make a thumbnail toolbar button (TTB from now on)visible when the it is clicked. I know how to do stuff when it is clicked, AddHandler etc. But if I tell it TTB.visible=false then it doesn't become invisible. If I put TTB.enabled = False it will be disabled, so it's only the visible that isn't working.
Also I put a button on my form (not a TTB) and when that is click wrote, TTB.visible = false and that didn't work, so there is no way to make it invisible.
Try set TTB.visible=true after you Add it into toolbar button list.