I was wondering what is the best way to print entire content of scrollable control. I was trying to print a control in several ways, however all the time I was only able to draw visible content of control. So far I tried to use
PrintForm // there is nothing I can do with this because it requires a form not a control
I was also trying to use controlName.DrawToBitmap() method however this function captures only the visible area of control.
What is the best way to draw this kind of controls ?? I would like to avoid scrolling control's content in order to capture all control's element.
I would suggest that you create an invisible to the end-user form (for examlpe, position it at (-10000, -10000) and this form should have the size enough to display the ScrollableControl without scrollbars. This way you will be able to workaround this problem.
Related
I'm adding buttons (with text and images) to a richtextbox control, but because I don't use the following line:
richTextBox1.AppendText(Environment.NewLine + str);
The scroll bar doesn't match the total number of lines, and doesn't resize properly, how can I solve it?
What is going wrong
I find this to be a very peculiar way of doing things. So first, lets add a little background:
When you use richTextBox1.Controls.Add(new button()) - what you are doing is: you are adding the new button as a child of the richtextbox, not as content - and this is the problem.
The scrollbars are set to read their height/scrollable area etc from the content of the richtextbox, and yours has no content, hence no scrollbar (or false readings etc).
You could create a custom richtextbox control that inherits its scrollable area from the location of its child controls. However, if you would rather avoid that route, please continue reading:
The correct way
I do not know your use case, so this may not work, but I would remove the richtextbox control and instead use a panel control. The panel control for example will update it's scrollbars based on child controls, whereas the richtextbox wont - and this should give you the behaviour you are expecting.
Is there a way to move a popup to back, so it does not always display on the front of the application?
I have a canvas that displays many shapes, which are resizable. To get the resize box I am using a popup, because it was suggested that the best way would be to use adorners, but these are not used in UWP, so the alternative are popups. It works quite well, but when I have another element overlaying my canvas and resizing was enabled on a shape, the popup elements (resize thumbs/nodes) are displayed on top of the element that should be overlaying the canvas. Is there a way to tell the popup that it should not display on a "higher level" than my canvas?
A Popup control is intended to be displayed on top of all other content so it seems you're not using an appropriate control for what you are trying to achieve.
Without seeing more of your code and having a clearer idea of what you're doing (repro?) it's hard to suggest what you should do. However, I'd avoid resizing control that aren't on top of the viewable area or having multiple items in a resizable mode (or just with adorners displayed) at a time. Both of these should avoid what you're reporting.
I'm certain this can't be as complex as I'm finding it so far!
I'm trying to render a horizontal list of user controls. There will be a large number of them. So some form of Virtual list would be prefereable.
Each user control will contain an image and be selectable.
In Android/Flex/iOS this is trivial with their List Adapters, List Item Renderers etc... However in Win forms it seems very tricky indeed.
I've looked at ObjectListView setting the view mode to Tile. However there doesn't appear to be a way to render horizontally.
I've tried just populating a flow layout with my user controls. But the memory usage goes through the roof as it's loading images.
You could use FlowLayoutPanel container control and set its WrapContents to false and FlowDirection to LeftToRight (which is default). ...and, probably, AutoScroll to true.
EDIT
As to going out of memory, think of simulating virtualization by handling Scroll event and creating/disposing controls as needed.
Derive your own image control from Control and override OnPaint in order to draw the image yourself. Add a property for the path or name of a picture, but don't store the image itself in the control. Google for custom control c#.
Use a cache for the images. A good data structure for this is a circular buffer. This helps in keeping only a limited number of images in memory.
I'm new to Windows Forms in Visual Studio, and I am wondering how to automaticly resize controls to the window size.
Say, I have 2 controls in a panel, a List Box and a Button. I want the button to dock to the bottom, and I want the List Box to fit the rest of the space. when the window resizes, the button should be at the bottom (as expected with docking), and the list box should stretch down to the button.
Is there a way to do this without any code?
Thanks.
Dock is pretty easy to use, but I recommend using the Anchor properties instead. Resize your form to a reasonable size in the Designer. Then, place your controls to look the way you want. Then, decide which controls should resize with the form and set the Anchor property as follows:
If you want the control to resize with the form in width, set the Right anchor.
If you want to resize height, set the Bottom anchor.
If you want the control to stay right when the form resizes, unset the Left anchor.
If you want the control to stay bottom when the form resizes, unset the Top anchor.
The problem I have with Docks is that they sometimes act funny when controls are not declared in a specific order, and to get the effect you want, sometimes you have to create extraneous panels just to hold controls.
It really gets messy when you want to maintain the aspect ratio of each control. One way, which is not really up to the mark if you want to get into fixing the details, is to use TableLayoutPanel and use Dock and Anchor wisely to achieve what you want.
Use the dock and fill options on the controls. Look under properties for each object, and containers if they are in any.
You can use SplitContainer
Google for examples. Here is one
Try setting your ListBox's Dock property to Fill.
You'll need to watch for one thing though: by default the ListBox will size itself to display whole list items. If you resize the control so that it displays a partial item it will adjust itself so it will display a complete item. This can make the control appear to lose its 'Dock'ing behavior. The solution for this is to set the ListBox's IntegralHeight property to false, which specifies that the control not resize itself to fit complete items.
How can I assign a background image to tabpage control in Visual Studio C# 2010? I am able to provide background image to each of the tab separately, but I cannot do it so for the whole tabpage control, due to which a portion of tabpage control remain with different background and each of the tab pages has ok and fine background.
Here is the picture of my form:
See the 'grey-colored' region in the tabs line. How can I cover the whole tabpage control with one single background?
The header area that contains the tabs is not part of your tab page. It's part of the parent TabControl, which is automatically drawn for you by Windows.
If you want to change how it looks, you'll have to draw it yourself. That's called owner-drawing, and it's not exactly a trivial undertaking, especially for a complicated control like this one. For starters, you can't just use OwnerDrawFixed, because that just allows you to custom draw the contents of the tabs (for example, to change the font). You will need to owner draw the entire tab control.
I can't imagine a good reason that you would ever want do this, but you'll find a few samples online that might help get you started. For example:
http://homepage.ntlworld.com/mdaudi100/alternate/tabcontrols.html
http://www.codeproject.com/KB/tabs/flattabcontrol.aspx