As the title says, I have a pictureBox and a button (Windows Form Application) and I need that button to appear on top of the pictureBox as right now the pictureBox hides the button when I put them together.
Thank you in advance !
You need the BringToFront method:
button1.BringToFront();
You can access this method design-time through (Right click => Bring To Front)
When you do that, the designer is changed so that the button is added first to its parent, that way it is on top.
Docs:
The control is moved to the front of the z-order. If the control is a
child of another control, the child control is moved to the front of
the z-order. BringToFront does not make a control a top-level control,
and it does not raise the Paint event.
There is Bring to front operation in context menu in winforms' designer
Related
By default when you drag a control (Label, TextBox, etc.) beside another control, it forces the control you're placing into alignment with the other control you just dragged.
I disabled that somehow by accident and now I have no clue how to re-enable it.
I have already tried changing everything on the page with no results, including after closing the designer and re-opening it for every single change I made.
Fourth button from the left, bottom left of the designer window.
I'm curious about Popup control in Windows Phone. For me, it's some kind of panel, that has IsOpen property. And I should used it, when i want to present some only in some defined context (e.g. button pressed).
But why not use just normal stack, or grid panel, and when use Visiblity when you want to hide, or show it? It's seems to behave the same.
You can change the Horizontal and Vertical position of the popup using the HorizontalOffset /VerticalOffset properties in the Popup control. We don't have that option in the Grid and to other panels.
It is an overlay. It doesn't break page layout as it shows above the main content.
While StackPanel or Grid should be added to main content and when they are shown they'll move other controls down.
In our application we have white buttons on a white form. When the mouse hovers the button we want to show a light-blue transparant rectangle over the button.
I want to create this user control, but I don't know how to do this. I've tried google, but I didn;t found anything that could help me, so I hope you guys can point me at the right direction.
You can just derive your own WinForms control from a Button and override the OnPaint event. In the event handler you'll have an PaintEventArg parameter that contains the property called Graphics. You can use this property to draw anything you want directly where you control is located.
Here is an example directly from MSDN: http://msdn.microsoft.com/en-us/library/system.windows.forms.control.onpaint.aspx
Added: just re-read your question and found that I didn't not reply it correctly.
Basically, you have to override two events and add one property showing whether your control should be painted with an overlayed rectangle or not, let's say IsDrawRectangle. As soon as the OnMouseEnter event is triggered you check if IsDrawRectangle is set and if not you set it to true and invoke this.Invalidate(). The Invalidate() method will force the control to be re-drawn and then in your OnPaint event you just again check the value of your IsDrawRectangle property and draw the rectangle if needed.
You also have to override OnMouseLeave to set the property back to false and force the repaint to remove the rectangle.
Added: if you need to re-draw more than just a single control (in case if your rectangle covers some other controls that need to be re-drawn) then put everything you want to be re-drawn in one container and call the Parent.Invalidate() method in your event handlers.
I am creating a GUI with C#. I intended to use a ListView to see preview of pictures, and a PictureBox to display the full view. I used a Panel as parent and placed a PictureBox inside of that to have scrollbars appear on the picture box.
What I still can't figure out how to do is to provide close, maximize, and minimize, buttons on the Panel, as seen in many GUI applications.
How can I do this? Any ideas will be appreciated.
Those other GUI applications probably use a Form instead of a Panel/PictureBox, assuming that they provide maximize, minimize, and close buttons.
You could add your own buttons to the Panel control, and then write code in their Click event handlers to do whatever you want with the control. This is easy and relatively straight-forward if you just want to be able to close the picture, but it seems like unnecessary work to duplicate all of the functions that are built right into a Form.
I'd ditch the Panel control, add a new Form to my project, place the existing PictureBox control onto the form that I just added, and go from there. You might want to set the form's FormBorderStyle property to something like "SizableToolWindow", depending on how you want it to look.
I want to show a transparent panel on top of another panel, both the panels have child controls like labels, text boxes etc. Transparency works fine if the transparent panel is child control of the other panel but if not then the label and text box of the normal panel appears on top of the transparent panel. Transparency for rest of the area works fine.
Any ideas ???
I have tried bring the transparent panel to the front but did not help. Perhaps I need to specify the order in which the controls should be drawn ?? If yes how do I do that ?
Interestingly if I move the application below the task bar and bring it up. It achives the right result. ( Reprinting resolves the issue !! but why??). However when I minimize it and restore it does not fix it!
Thanks,
Transparency in Windows.Forms is implemented by relational hierarchy rather than visual hierarchy. When a transparent control is painted, .NET basically calls up the Parent tree asking each parent control to paint itself, then paints the actual control content itself.
Two siblings in the same control will paint over each other.
So to answer the question, the topmost panel/control needs to be a child of the control you want to paint on top of.
If you want a transparent control that won't obscure its siblings, according to Bob Powell you can do it by overriding the CreateParams method to add true transparency. Read the link for a full description.
If all your panels/labels/controls are part of a single UserControl then you are probably right that you just need to set the Z-order (the front-to-back order). You can do this using the Document Outline inside of Visual Studio's Designer under View > Other Windows > Document Outline.
If you're doing it programatically then you can play around with calling Control.BringToFront() or Control.SendToBack() to change their z-order. One possible way to do this is like (assuming ctl1 is intended to be at the back and ctl4 is intended to be front-mode.
SuspendLayout()
ctl1.BringToFront()
ctl2.BringToFront() ' Bring ctl2 in front of ctl1
ctl3.BringToFront() ' 3 in front of 2 (and in turn 1)
ctl4.BringToFront() ' 4 in front of the rest
ResumeLayout()
The Suspend/Resume Layout calls prevent the UI from updating while you rearrange things.