In my form I have a RichTextBox. I also have a VScrollBar and HScrollBar. I set the RichTextBox property ScrollBars to None so I can use the new scroll bars for it. Thats where I hit a problem, how do I do it? I searched online and found nothing for "c# richtextbox vscrollbar"
Please add references to articles to your answers so I can learn how it works.
I don't know if there is a way to do what you want. The best thing I can thing of would be to try and find the right position in the text, then Select() and ScrollToCaret(). I usually only use that trick to force a TextBox/RichTextBox to scroll to the very end, though. It wouldn't be very easy to use it for what you want.
Is there a reason why you don't want to use the default scroll bars?
In my experience, I've rarely had any luck anytime I've tried to use custom scroll bars in C# - especially with a control that has the ability to auto-scroll built it.
The only time I've used them without too much trouble is with a third party control that didn't have an auto-scroll capability.
Related
I have created a custom control of my own and i am in a need of making this custom control as a ToolTip for the Labels or Buttons.
But i could not find a way to set the Custom control as ToolTip.
Anyone please help me on setting the Custom control as ToolTip.
Note:
I don't need solution with showing the Custom Control in mouse_hover events of controls.
Please suggest me ideas to make the custom control as default ToolTip in standard way.
Regards,
Amal Raj
I assume that you already know about overriding the paint event, so I won't go into that. If you want anything a bit more complicated, deriving from the ToolTip control to extend it for your purposes won't make much sense since you'll run into restrictions quite fast.
What you should do is implement your own ToolTip control by reusing some important bits from the original one. If you're feeling adventurous you could follow these steps to get started. I'm going to refer to your custom control as tooltip from now on:
If you want to show custom text or something else for each control that uses your tooltip, you need to implement IExtenderProvider in your class. Here's more about it.
You need to keep track of controls that are using your tooltip and the custom values you've set for them. Internally, Windows Forms tooltip uses a HashTable for that purpose. Key is the control showing your tooltip and value is the tooltip text (or something else you want to tie to your tooltip).
If you want to have more than just one string to show (title, description, image etc), you can have multiple HashTables.
When adding the tooltip to a control, subscribe to mouse events (enter, move, leave) to keep track of when to show the tooltip. If you want to have a delay before showing the control, you need to use an internal timer to keep track of time.
You'll most likely want the tooltip to extend outside the main form's boundaries. You could wrap your tooltip inside a headerless form or an alpha blended form to allow other shapes than rectangle.
Those are the very generalized first steps. In reality, there's quite a bit more to be done. It's been a few years since I implemented my custom ToolTip control so I might be forgetting something crucial. However, if you spend some time poking around the code of Windows Forms's ToolTip class, you'll get quite a good idea of what's going on behind the curtains.
I haven't reviewed the code myself but judging from the ratings, this article will give you a good starting point too: A ToolTip with Title, Multiline Contents, and Image. It's in VB.NET but you can easily convert it to C# by using Telerik's converter or any other.
How can it be done? If there are, for example, four groups of buttons in menu-like panel. How would you dock them to their initial location if the window is resized?
I am trying this using DockPanel and HorizontalAlign, but it seems to only be work for the last button on the right when the window is resized. But how do you dock(anchor) a group of buttons? Maybe put them in border object and use HorizontalAlign for it? Is there more elegant way to do this?
To summarize the comments: I don't know your background but it seems you are used to another way of UI design where you do not explicitely have to specify grouping etc in code. While that might seem more elegant, it is not: the designer generated code is awful and the whole system is not as flexible nor srtaightforward as what WPF gives you..
With WPF you get a clear one-to-one relationship between your intent (treating buttons as a group within a layout) and the actual code (put the buttons in a stackpanel/grid/...). Or draw a border around buttons and organize them vertically within the border vs in xaml use a border with a stackpanel inside. It won't get any more elegant than that.
Read up on WPF layouts and once you'll get a grip of it you will quickly see that it is rather powerful and beatiful at the same time. I found this tutorial pretty helpful when just starting with layouts. And google provides lots and lots and lots more information, as usual.
Like stijn said, put the buttons in a Grid or a Stackpanel and you'll be fine.
You may not think it's beautifull, but it's the best solution for your problem.
Is it possible to use a third party scroll control inside a FlowLayoutPanel? Thing is that we are using devexpress controls and the FlowLayoutPanel's scrollbar controls does not look good.
Is there a way to custom paint or replace them with devexpress controls.
Any ideas on how to go about this?
I would suggest that you take a look at the XtraLayoutControl Suite that provides a greater functionality in comparison with the FlowLayoutPanel control. Also, please note that our skinning engine works only with DevExpress controls and thus standard controls and their elements are not skinned.
Finally, this is just an idea, and it might work. You should turn off the FlowLayoutControl scrollbars and position our scrollbars near the control. You will have to handle the scrollbars' Scroll event to scroll the FlowLayoutControl programmatically and also synchronize the scrollbars position. This is not an easy task, but I just have no other idea on how this can be done.
I had the same need and came up with a solution combining the standard FlowLayoutPanel with the DevExpress XtraScrollableControl. See my post here.
At this point, I almost never want to design a control with rich design-time support again. That said...
I am already overriding the SnapLines property in my ControlDesigner-derived class to manually forward out various snaplines from the child controls of my control -- the text baseline (pink) snap from the labels and comboboxes; the text inset snap from the labels; the top, bottom, left and right snaplines from the comboboxes. Those snaplines activate when the control itself is moved around on the form and when other controls are moved around it.
What I need is the ability to tell the designer to activate the snaplines and then deactivate them while I'm doing an internal move or resize of the underlying controls.
My comboboxes are resizable through overrides of OnMouseDragBegin, OnMouseDragMove, and OnMouseDragEnd in my control designer. The magic bullet I'm looking for is something I can call in Begin to tell the designer to show the snaplines and something in End to tell it to stop.
Allowing people to resize and move the internal controls at design time is kind of useless if they don't show snaplines for each other or for external controls.
As with stuff like this, it's incredibly hard to search for. I've found one post on a forum where someone asked this exact question that had (of course) no responses. That's about it.
Obviously the issue of actually snapping to the snaplines when/if they're shown remains. Just being able to see them would be a nice start.
Any ideas?
The best way to do what you want todo is to create a Design Surface MSDN Reference
I've used this to create my own design surface for my application so that the clients can customize the forms.
Hope this helps,
Johan J v Rensburg
i have a customized scrollbar, however i have tried my best to make the original one from windows invisible by using the customized one covering on it, it can not be done.
any one have idea of how remove the original scrollbar ?
this.richTextBox1.ScrollBars = System.Windows.Forms.RichTextBoxScrollBars.None;