I also wanted to flag up the various WPF Gotchas that might trip up the unwary WinForms developer. It also depends which one is first because these are not commutative.The fix is this (and you can put Rotation and Transformation in any order. There's a little WPF Gotcha lurking in the canvas, just waiting to confuse you. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Thanks a lot, but there is a small bug in the code above. All we have to do is make the respective controls movable. Then add a new class. When you create this layout, as you can see from the screenshot below, the Image appears in the top left hand corner of the Canvas by default: You would be forgiven for assuming that the attached Canvas.Left and Canvas.Top values of the Image are set to zero. Leave a comment. I currently specialize in architecting Azure based systems and audio programming. 
We use cookies to give you the best experience on our website. WPF is (again) slightly different. As the user moves the mouse, the event fires for the control that the mouse is over. A simple If/Then statement will fix this: If LeftPos < (MainCanvas.ActualWidth - MoveableImage.Width) Then, MoveableImage.SetValue(Canvas.LeftProperty, CDbl(0)). (direction!=direction.Vertical)container.Left=Math.Max(0,e.X+container.Left-DragStart.X); (direction!=direction.Horizontal)container.Top=Math.Max(0,e.Y+container.Top-DragStart.Y); .groupBox2,MoveControls.helperClassforCotrolMover.Direction.Any); .groupBox2,MoveControls.helperClassforCotrolMover.Direction.Horizontal); .groupBox2,MoveControls.helperClassforCotrolMover.Direction.Vertical); How to Migrate (P2V) Physical to a Virtual Data Center - Convergence VMware Virtualization Concepts, Onion Architecture In ASP.NET Core 6 Web API, Getting Started With Angular Electron Application Development, JWT Token Authentication In Angular 14 And .NET Core 6 Web API, Why SharePoint Framework (SPFx) Is Best for SharePoint Development, Basic Authentication For Azure Functions (Open API) .Net 6. Heres a short example that uses theMouseDown, MouseMove andMouseUp events to move a user interface element around on the screen. We place aLabel in aCanvas and then bind its position to a couple of properties that keep track of the desired X and Y position of the label. ***> wrote: Can you try disabling this service? A helper class is just a term to refer to a class that provides methods that "help" do something. Then we iterate over that list and subscribe to the MouseMove event for each element. You will, however, see the routed events when a child element of the canvas originates the event. Is there any way to move elements in such a scenario? So that the control does not disappear behind all the other controls, we still call .BringToFront () of the control and set the location of the control to the current mouse coordinates. As you can see, the first line tests if there is still enough width remaining for the Image to be moved 10 elements to the right and still be visible. hey, you're right - good catch, thank you! Unfortunately, activation email could not send to your email. When the mouse leaves the rectangle, it will show a message that mouse has left and the rectangle will change to its default color. 
Here we only check whether the left mouse button was pressed and cast the event sender to a control. 3 Comments. The WPF Image doesn't support the Click event, but MouseDown is available for the same purpose. . The same code ruining on .NET Framework works fine. try to look and disable other libraries I use. Most controls in WPF inherit a series of mouse input events fromtheUIElement class. It will also fail if you don't cast the value (in this example, zero) to a Double. You would then use code along the lines of: If e.Button = Windows.Forms.MouseButtons.Left Then. The cause of the problems are third party applications like Nahimic which intrude into other processes incorrectly.
To take an example, let's say that you need to allow an Image to move to a different location on screen in response to some user action. If not, then the Image is shunted back to far left of the Canvas.
Already on GitHub? Our Story: How & Why We Built the BoldDesk. @legistek this issue is closed, tags are probably just leftover. In addition, you will get a message that the mouse has entered along with its coordinates. Very nice - simple and elegant. It's a reasonable assumption to make, especially as you can see the Image in exactly that location. All contents are copyright of their authors. Unfortunately customers don't care who caused the issue when your application breaks though, and I have no way of reaching the people behind this utility. C#,Windows Form, WPF, LINQ, Entity Framework Examples and Codes. In, /* * * * * * * * * * * * * * * * * * * ** * * * ** * * * * * * * * *, * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */, ="http://schemas.microsoft.com/winfx/2006/xaml/presentation", ="http://schemas.microsoft.com/winfx/2006/xaml", * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */, //see the Element class declaration at the bottom, using it for readablity. An instance of a helper class is called a helper object. FYI, I had a client report this issue and disabling Nahimic solved it. So the next step is to wire up an event handler for this: We will process this request shortly and get back to you if required. Reply to this email directly, view it on GitHub In this article, we will learn how to move controls with the mouse on form at runtime in C# windows applications. You may want to check for programs like Nahimic or try to run the program on other machines. 2022 C# Corner. I stopped the Nahimic Service, and suddenly WPF acted just fine. Tagged with Graphics, MouseMove, Radial Gradient, RadialGradientBrush, WPG, #682 Panel Elements Only Fire Mouse Events When Background IsSet, #681 No Mouse Events When Visibility is Hidden, Collapsed orHidden, #230 Changing a Radial Gradient as Mouse Moves Over aControl, #1,219 Expanding All Nodes in a TreeView byDefault, #1,218 Stretching Items in TreeView across EntireControl, #1,217 Using Multiple HierarchicalDataTemplates in aTreeView, #1,216 Creating a Custom ItemTemplate in aTreeView, #1,215 Binding a TreeView to a Hierarchical DataSource, #845 - Display Ellipsis in TextBlock to Indicate that Content Doesn't Fit, #854 - Clicked vs. Checked/Unchecked Events for CheckBox, #210 - Specifying Colors in XAML As RGB Values, #351 - Binding a CheckBox's IsChecked Property to a Boolean Variable, #1,219 - Expanding All Nodes in a TreeView by Default, #1,107 - Accessing an Embedded Resource Using a Uri, #360 - Binding a ToggleButton's IsChecked Property to a Boolean Variable, #906 - Programmatically Changing the Current Tab on a TabControl. The properties derive from a base position for the label, plus the current mouse position. rect2_MouseLeftButtonDown is redundant. The ultimate WPF UI toolkit to boost your development speed. In this kind of situation, you probably won't want the Image to either get stuck at the right hand side of the Canvas or, possibly even worse, move out of sight. By default the Left and Top attached properties are in fact set to Double.NaN - Not A Number. @konradsikorski Expected behavior: In a follow-up blog, I plan to take this task a step further and look at ways of giving the user several ways of achieving the Image movement - all of which loop back to a single piece of code, ="http://schemas.microsoft.com/winfx/2006/xaml/presentation", ="http://schemas.microsoft.com/winfx/2006/xaml", WPF: How To Move Controls and Elements At Runtime, EmailVerify.NET - six levels of email address validation, How To Upload and Download Files with FTP from a VB.NET Application, How To Use a Previously Created Custom Control in a New Application, Serialize and Deserialize a Collection of Objects to a Data File. often such problems come from bad third party software. Both rectangles can use the same event handler. To set the NotifyIcon at the MousePoint, you need to get the Mouse Position Coordinates of the control by using the Mouse.GetPosition () method and then set the Coordinates at the BalloonTipLocation property of the NotifyIcon. In my case, I have created the helperClassforControlMover.cs class to move the controls and write down the below code. Sometimes, a control may only be moved in one direction. We can do this by changing the RenderMouseOver property of the ButtonChrome objectfound in the buttons control templateto False. In the example below, we dont seeMouseMove event on theCanvas unless were moving the mouse over one of the childButtons. MoveControls.helperClassforCotrolMover.Init(, publicstaticvoidInit(Controlcontrol,directiondirection){, publicstaticvoidInit(Controlcontrol,Controlcontainer,directiondirection){. In object-oriented programming, a helper class is used to assist in providing some functionality, which is not the main goal of the application or class in which it is used. You are using an outdated version of Internet Explorer that may not display all features of this and other websites. TheMouseMove events indicate that the user is moving the mouse across the element in question. When you click inside the rectangle, it will change color and show the coordinates at which mouse has been clicked. For example, if we have aTextBox inside aStackPanel that is inside aWindow and we move the mouse around within theTextBox, well see the following events fired: Filed under Events // if mouse is down when its moving, then it's dragging currentif (e.LeftButton == MouseButtonState.Pressed ||e.RightButton == MouseButtonState.Pressed ||e.MiddleButton == MouseButtonState.Pressed) this.current.IsDragging = true;With this, buttons can be moved with the right or middle mouse button. The fix is simple - you just have to assign values to the Canvas.Left and Canvas.Top properties in the XAML when you create the Image element, but it's something that isn't obvious. // Ensure object receives all mouse events. But if you try this code, you will find that nothing happens when the Image is clicked. Is anyone on the WPF team assigned to this? Display Content of Textbox on a Label Using Button in C# Console Application Examples (50+ C# Examples), Calculate Square Root Without Using Sqrt in C, Simple Calculator Example in C# Console Application, Create Simple Login Form in C# With Sql Server Database, Display Content of Textbox on a Label Using Button in C#. Correct inaccurate or outdated code samples, I agree to the creation of a Syncfusion account in my name and to be contacted regarding this message. // if mouse is down when its moving, then it's dragging current. You set an initial value on the Canvas.Top property then increment this when the MouseDown event fires. I thought you may have some other remedies. This is effectively a null value that is assigned in order to allow the Canvas to make use of its own built-in layout intelligence for more complex scenarios. This is my demo code: https://github.com/lindexi/lindexi_gd/tree/81b45a7dc9eb4d7fd3fe167acea414f16de83cca/NearchecekeryalkeeLekegegal. One advantage of this is that helper class helperClassforControlMoverhas only static methods. Learn how your comment data is processed. Filed under Graphics XAML is brilliant for creating user interfaces at design time, but if you need to make changes dynamically at runtime, this can sometimes be a problem. // Retrieve the current position of the mouse. Copyright 2001 - 2022 Syncfusion Inc. All Rights Reserved. So the first step is to create a Canvas in a WPF Window, place the Image inside the Canvas and assign a value to the Source property of the Image: xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation", xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml", Title="Image In A Canvas" Height="300" Width="300">, Filed under Events often New Product LaunchBoldDesk: Help desk ticketing software starts at $10 for 3 agents. Here is the C# code in which different mouse events are handled. When third party vendors break the operating systems rules there's little more that can be done than pushing back to them for fixing their code, or uninstalling/disabling it. Finally, of course, you can combine the horizontal and vertical movement of the Image - maybe by using the Middle mouse button: ElseIf e.ChangedButton = MouseButton.Middle Then, MoveableImage.SetValue(Canvas.LeftProperty, MoveableImage.GetValue(Canvas.LeftProperty) + 10), MoveableImage.SetValue(Canvas.TopProperty, MoveableImage.GetValue(Canvas.TopProperty) + 10). Where did you download the Net Core 5.0.200-preview.20601.7? When we move the mouse of the space where the button whoseVisibility isHidden, we dont see theMouseMove event firing. Thank you for your feedback and comments. such problems come from bad third party software However, I just needed something very simple, so heres a short code snippet that you can try out using my favourite prototyping tool LINQPad: The key is that for each draggable shape, you handle MouseDown (to begin a mouse capture), MouseUp (to end the mouse capture), and MouseMove (to do the move). This includes thePreviewMouseMove (tunneling) andMouseMove(bubbling) events. Everything a WPF Developer Needs to Know, in Bite-Sized Chunks, November 12, 2012 Obviously if you need dragged objects to come to the top in the Z order, or to be able to auto-scroll as you drag, youll need to write a bit more code than this. In this article, we will learn how to move controls with the mouse on form at runtime in C#. if (this.current.InputElement != null) this.current.InputElement.CaptureMouse(); } private void Grid_MouseUp(object sender, MouseButtonEventArgs e) { if (this.current.InputElement != null) { this.current.IsDragging = false; this.current.InputElement.ReleaseMouseCapture(); this.current.InputElement = null; } }, Final update, it took me hours to fix this. The above snippet can be expanded to have the tests for reaching the outer edges built in also. Please see our. I might suggest trying with a render transform. This code sample uses the simplest WPF Elements - a Canvas and a couple of Rectangles. to your account. I don't think this needs much explaination. :). I have also found this method to be poorly performing, as those properties effect layout. I create courses for Pluralsight and am the author of several open source libraries. I haven't done any update or library nor VS. did you read the linked issue mentioned in the previous responses? On Tue, Aug 10, 2021 at 3:12 PM Tobias Ks ***@***. If you are moving from Windows Forms to WPF, you may expect to find the Button property of the MouseEventArgs. Learn more. Tagged with Miscellaneous, Mouse, MouseMove, Moving an Element, WPF, November 2, 2012 NahimicOSD. Now you could add persistence in the form load and form close for the controls and nothing stands in the way of the user designing the forms. User interface elements will not receive mouse-based events when the elementsVisibility property is Collapsed orHidden (rather thanVisible). The NotifyIcon can be placed at the Mouse Position by using the BalloonTipLocation property. Thats what I take from following the conversations in the issues. Could you give me the specific link to reproduce your error. Filed under Events This is true for splitters and stuff. In example below just run the app and quickly move mouse over buttons and you will see that from time to time buttons will disappear. This issue is marked as "Needs More Information" - what more do you need from us? Asking clients to disable Windows services is not a long term solution. In what situations are you getting capture loss? However, it doesn't actually work like that. Find anything about our product, documentation, and more. So just copy/paste and run it. The following code snippet combines the use of either the left or right mouse button to move the Image left or down respectively: ElseIf e.ChangedButton = MouseButton.Right Then, Dim TopPos As Double = MoveableImage.GetValue(Canvas.TopProperty), If TopPos < (MainCanvas.ActualHeight - MoveableImage.Width) Then, MoveableImage.SetValue(Canvas.TopProperty, TopPos + 10), MoveableImage.SetValue(Canvas.TopProperty, CDbl(0)). For all we know Nahamic might not be the only utility that does this. Actual behavior: The BalloonTipLocation property is used to set the desired location for the NotifyIcon to be displayed. Program maintains a variable "current" that keeps track of which control (or UI element) on canvas is under a possible dragging action. A little bit improve for avoid some "sticking" to cursor^this.current.IsDragging = e.LeftButton == MouseButtonState.Pressed;insteadif (e.LeftButton == MouseButtonState.Pressed) this.current.IsDragging = true; //update for fixing bugs private void Grid_MouseDown(object sender, MouseButtonEventArgs e) { this.current.X = Mouse.GetPosition((IInputElement)sender).X; this.current.Y = Mouse.GetPosition((IInputElement)sender).Y; // Ensure object receives all mouse events. Controls on mouse hover disappear spontaneously. canvas gets the coordinates of the current control and captures the mouse on it. Because these events propagate, however, the events will also tunnel down to the control that the mouse is over and then bubble back up the logical tree.