VS 2010 TabControl With DragDrop Not Raising MouseClick Events On Tabs
Aug 29, 2010
I have a custom (inherited) TabControl which adds Drag/Drop functionality to it, so that one can drag the tabs around, either within the same control (to re-order them) or to and from other TabControls. I've noticed some time ago that my TabControl however was not raising its MouseClick and MouseUp events (or actually: it is not calling its OnMouseClick and OnMouseUp methods, which comes down to the same thing). I've been struggling with this problem for a long while and I finally figured out what is happening. I'm no closer to figuring out what to do about it though... The problem seems related to the drag drop functionality. I have this code in the OnMouseDown method (which is raised as usual):
[Code]...
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Apr 4, 2012
the question is really what is the correct convention (style) for raising and handling events. When a button is clicked it is generally handled by this method. [Code]
I have recently been trying to follow this convention by creating my own EventArgs class and inheriting the system.eventargs, Then adding my own properties. The problem is as my projects get bigger/complex I seem to be writing multiple eventarg classes. I then decide to try and create a generic eventarg class but this then seemed pointless thinking it would be easier just to pass the object directly instead of wrapping it up in "someEventArg" i have created.
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Feb 12, 2010
I am learning how to develop Windows Forms applications with Visual Basic Express 2008, and my testing/learning application has a TabControl with a few test pages (3, for example, the number isn't relevant here).Now, I am handing the MouseClick event on the Tabcontrol, and I can't seem to be able to figure out how to get which tab was clicked on.I believe that the MouseClick event isn't fired if I click on another place of the tab strip, therefore a tab must have been clicked on. The problem is, which was the tab?
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Jul 22, 2009
I have a windows application which raises a particular event.I need to create a COM callable class whic will allow VB 6.0 to subscribe to this event.I have done a fair amount of research on this and am confused as hell.
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Aug 15, 2011
can I call shared events contained in one class from another class?
for example:
logonclass.vb : handles login logic and authenticates against database
logonmanager.vb: hold current user reference and some logon and timeout events
Logon.vb: A form with a submit button.
I would like to do something like this but I can't get the compiler to agree with it
If VerifyEntries() Then
Try
privLvl = LoginClass.AttemptLogin(txtUserName.Text, txtPassword.Text)[code].....
If this isn't the proper way to wire things together let me know so I can learn to structure differently. In my planning it seemed like I was raising a lot of extra duplicate events from my logonclass to my loginmanager class. Then the loginmanager had to raise it again for the main form to see the change event. It got me thinking that if I publicly shared the events and could raise them from wherever then it would cut down on the amount of events I needed in code and the amount of them flying around at runtime.
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Dec 27, 2010
I am currently trying to make a calendar project it has 2 user controls one is the calendar and the other is the calender day control. When the month changes in the calender control I need to raise an event in daycontrol to update any holidays. In the calendar control I have the following code for the event:
Friend Event MonthChanged()
Public Sub New()
' This call is required by the Windows Form Designer.
[Code].....
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Jul 14, 2011
I want to have a collection of a class which inherits picturebox, with a couple of extra properties, so essentially the same. Only I get an error at runtime saying : 'An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.' Here Is my code, I know that the error occurs here :
[Code]...
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Jul 26, 2010
I have a TAPI program that is very similar to [URL] I have a delegate ...
Delegate
Sub TapiEventCallback(ByVal
dwMessage As TapiEvent,
ByVal dwParam1
[code].....
From my program TAPI will call the number. My problem is that its not raising any events. I really need CallStateChange. I raised it from address and moved it up to my TAPI Manager. I put break points everywhere and I can not get anything to raise.
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Jul 8, 2010
I've got a research application that is hosting a webbrowser control and I'm implementing a feature that allows the user to select text from a web page and drag it to various research note fields. The issue I have is the dragenter and dragdrop events continue after the initial drop, inserting the text multiple times. Here's the test case on my box and the result.
Select Text in Browser Drag to Text Box Drop Text What happens is after the drop event is fired and the text inserted to the drop target, when you move the mouse after dropping the text, the drag enter event is fired, followed by the dragdrop event, then another dragenter and dragdrop. So, selected text such as "Selected Text" becomes "Selected TextSelected TextSelected Text".
Note: The dragenter event is properly raised once when the mouse enters the textbox, however the mouse does not have to leave the textbox after the dragdrop event fires. i thought there was something wrong with my application so I created a simple test app, containing a Webbrowser and a multi-line text box. This test app generates the same results and the code is below. This is the first time, I've implemented
drag and drop operations and I followed the guidelines noted in this MSDN article. While I did what the article suggests, I'm thinking I need to note the event was handled somewhere.
[Code]...
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Jun 4, 2012
I have 3 classes in 3 separate dll.
1) Class "BaseForm" that inherits from System.Windows.Forms.Form with "MyEvent" declared as Public Event ()
2) Class "MyForm" which inherits from "BaseForm"
3) class "MyClass" which has a public property "ExternalObject" of "BaseForm" type (the private variable is declared WithEvents)
I make the following steps:
1) intercept the Form LOAD event in "BaseForm"
- Instance the class "MyClass", Assign public property "ExternalObject" = Me
- I do a RaiseEvent "MyEvent" in "BaseForm"
2) "MyEvent" is triggered BEFORE in "MyForm"
3) AFTER "MyEvent" is triggered in "MyClass".How Can I Raise event Befor in "MyClass" and then in "MyForm"?
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Sep 6, 2009
My windows application needs to raise an event in a COM callable assembly so unmanaged code can pick up on the event.I am sick of this. All the crazy tags required for COM callable is doing my head in.
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Jan 8, 2009
I'm creating macrobutton fields in Word by .NET to add fields. I need someway to figure out when a field is copied and pasted. Is there a kind of event which will be reased within Word to .NET?
This is the code to generate the fields:
[Code].....
General I need to add a field to Word with a given name and a guid and when it's clicked, moved, copied or pasted. I need an event to do something with it.
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Feb 8, 2012
My application has 1 main form and three other forms which raise events to my main form. I noticed that the memory starts at 77,000 K and increases substationally over a few hours maby be to 250,000k and ever increases.The main form has a dataset and a bound datagridview which gets refreshed with data. Basically it's a taxi booking application. The booking form raises an event to the main form and the main form refreshes the jobs and displays them on the dgv.
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Dec 20, 2010
I'm trying to write a wrapper to a service, which will be used by an existing VB6 project. I've got most of the basic framework working, except for one important aspect: I can reference the wrapper in a VB6 project and subs/function calls etc. work as expected, but events do not. The events are visible in the VB6 app, but they never fire.
VB.NET Code:
Public Event Action_Response(ByVal Status as String)
Public Function TestEvent()
RaiseEvent Action_Response("Test Done")
[Code]....
So, the cmdTest button code prints 'Done' as expected, but the Action_Response event doesn't fire. Is there something else do I need to do to get the event to fire?
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Aug 27, 2009
Raising events in multithreaded classes?
I am running a class(gamepad handler) that uses many child threads to check for key input and the like then it raises events to my form to sort out the needed reaction, Is there a way to make the event raises on the same thread as the class itself.
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Jan 7, 2012
What I want is a tabcontrol where it doesn't show the tabs. I want icons in a toolstrip that will select the tabpages. The closest I can get is setting the ItemSize to 1 (if it is zero, it reverts to the default of 20).
How can I have a tabcontrol with no tabs displayed?
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Jan 22, 2009
I am having tabcontrol in which i want only to hide tabs.Consider i am having 2 tabpages. I want to hide only tabs of tabcontrol not tabpages.Then i will show the tabpages with this coding on button click.TabControl1.SelectedIndex = 1
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Jan 29, 2012
Ive seen some discussion on here about how to hide tabs in a tabcontrol but they all seem to be in C or some variant. I havent seen one for vb.net (i cant do C)
What i want to do is hide or disable all some of the tabs till the user has logged in. Ive sorted out the login and logout. All i need to do is add the code to enable/disable some tabs until the user has logged in.
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Jul 27, 2011
TabControl1. It is the only control that is created in design time. My text editor is a tabbed program. I have a addtab() function that whenever teh user clicks the toolstrip addtab, the tabcontrol adds tabs. THe code below is for the addtab()
Private Sub AddTab(Optional ByVal file As String = Nothing)
NewRTB.AllowDrop = True
NewTab.AllowDrop = True
[code].....
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Jul 5, 2011
Ok, so I'm using vb.net and there isn't a way to unhide/hide tabs so I have to use TabControl.TabPages.Add() and TabControl.TabPages.Remove() to do this. All of my tabs are labeled as Account1, Account2, etc. all the way up to Account25. I want to make a loop and be able do something like this so that I can add the tabs in the right order:
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Apr 27, 2011
I am attempting to test that the event handlers between an interface and controller are wired properly. The system is set up like the example below:
[Code]...
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Dec 17, 2010
There are multiple examples of modified TabControls on the Internet which allow the user to reorder the tabs using drag and drop. However, all seem to use the following technique:
Determine which tab is being dragged
Determine the index to which the tab is being dragged
Empty the tab page collection and add in the new order
The last step, hoewever, causes the control to flicker alot. Besides this, when there are a lot of tab pages on the tab control, it is rather slow.
Is it possible to swap items (i.e. swap indexes) in a TabPageCollection, without the TabControl flickering?
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May 9, 2009
I'm trying to images or favicons to tabs....Maybe there is a way to save each websites favicon, Save it to a folder on the comp, AND return it to the tabcontrol1.selectedtab...
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Aug 12, 2011
I need to be able to programmatically create new tabs on a TabControl, add controls to them, and be able to update the controls in each tab from another function. I already have a function to add tabs to the control, and to add controls to those tabs when they are created, but I'm stuck as to update the controls after they have been created.EDIT: This is what I have to make the tabs and add the controls:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim tabpage As New TabPage
tabpage.Text = "(empty)"
[code]....
I can't seem to get back into the account I used to post this question, so I have to post my follow-up to Tim's question in the comments for the previous answer as a new answer.Debug.WriteLine(TabControl1.TabPages.Item(2).Controls.Find("textbox1", True).Count) returns 0. The tab and the controls have been created prior.
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Aug 11, 2011
How do you close ALL of the tabs in a TabControl except for the currently selected one?
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Mar 26, 2011
I have an app with a TabControl that has 4 tabs on it. Each tab has probably 15 or so controls on it.This app is multilingual, so sometimes I need to resize things dynamically to make everything fit properly.For instance,I might need to resize a GroupBox to ensure a CheckBox can fit inside it properly if the language is changed. The language selection is on the tab with the GroupBoxes.
This dynamic resizing works flawlessly if I am already on the tab with the GroupBoxes when I make the language change, but when I start the app (on the first tab, not the language tab), my controls are being dynamically resized incorrectly (on the language tab).Further investigation showed me that only the first (currently selected) tab was the proper width, let's say 500, and the other tabs report 400 as their width, even though of course, they are indeed the same size.
I suspect this behavior is because unviewed tab pages are not... initialized? I'm not sure if that is the correct term. Even though I'm resizing controls on them? How can I bypass this behavior? Selecting each tab programmatically to "initialize" them does work, but is not a feasible option in this case, as the user can see it happening.
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Aug 4, 2009
I notice that the actual tabs on a TabControl are quite small (I am using VB 2008 Express). I would like more vertical space above and beneath the text on the tabs. I tried changing the padding in the TabPages collection but it didn't seem to do anything. Is there a way to make the tabs bigger?
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Mar 1, 2008
I want to have all the tabs hidden/removed in my tabcontrol at runtime then only display the one I want to (cludgy workaround for having to show tabs in TabControls).
I've been playing with ways to parse through all the tabs and remove them but am just not quite getting it. I'm a COMPLETE newcommer to VB as I've arrived from RealBasic and am trying to get my head around it.
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Feb 19, 2012
I am writing a tabbed webbrower program and i am trying to close the program when all tabs have been closed using ctrl+w. So far i have used the following code but it has errors as tabcount is readonly:If TabControl1.TabCount.Equals(0) then Me.Close() End If
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Jul 2, 2009
I have a tab control which contains other controls which I populate at run-time. I want to be able to hide certains tabs in this control and then make them visible at certain times. My understanding is that you cannot hid individual tabs in a tab control. All you can do is add them and delete them. If this is the case, is it possible to populate my controls in a Master TabControl at run time, then use a second tab control which is shown at the end of the routine, then add/delete tabs to this second tabcontrol and copy the populated controls from the Master TabControl to these tabs.
The idea being that I will create my tabs on the fly after the routine has run but I need the ability to copy populated controls held elsewhere into this tabcontrol.
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