When I tried to move label control within picturebox control, My mouse pointer become "Unavailable"(Used to indicate a surface isn't a valid drop target).
In this case not any single event of picturebox are fire.
Is there is any other way to do so.
It's still possible to move your label on top of your picturebox by going to Properties and changing the Location property.
If your label is no longer visible after this, it might be hidden behind the picturebox (lower z-index). To solve this, right-click on the picturebox and choose Send to Back.
Related
I recently used a TranslateTransform in my WPF application to implement dragging a UserControl across the screen. There is a new bug in that after the first time you drag it somewhere else on the screen, when you click on the "Title bar" on the control, it jumps back to where it was originally displayed. It will still follow the mouse, but that initial jump is disconcerting.
I don't know what's going on, but this got me to wondering. Since WPF controls don't have a left or top property of their own, unless you put them into a Canvas, and those are attached properties anyway, just what properties are being modified by the TranslateTransform?
WPF's layout and render passes have intrinsic knowledge of transforms. By modifying the X and Y properties of the TranslateTransform, you're causing the layout/render pass to take those new values into consideration when positioning the associated FrameworkElement.
To put it another way: the TranslateTransform is not modifying other properties, but by modifying its properties you are triggering another layout/render pass and thus affecting the on-screen positioning of the associated FrameworkElement.
Read here for more information.
My form is divided up into left and right panes, and the right pane is split into upper and lower panes:
AAAABBBB
AAAACCCC
There's a menu-strip at the top, below the title-bar and a status bar at the bottom:
menuStrip
AAAABBBB
AAAACCCC
status
Now I would like to add a toolStrip below the menuStrip. But when I do so, the toolStrip obscures the topmost content of the panes created using the splitContainer control. The Dock for the toolStrip = Top.
What am I doing wrong that the toolStrip doesn't simply get inserted between the menuStrip and the splitContainer control, pushing the splitContainer control down, so to speak?
You have to play with the BringToFront and SendToBack context menu items of those controls in the designer.
Drop the toolstrip container onto the form, then open the Document Outline window to re-arrange the controls into the correct hierarchy.
There are 2 simple ways of doing that:
Method 1
Open Document Outline window: View\Other windows\Document outline. Use buttons to place your control in the correct place
Method 2
Notice, that the current control in designer form is marked with some kind of focus rectangle.
You can easily navigate through current control parents using Esc key: once pressed, it can be used to go exactly one parent up in hierarchy.
Knowing the above just place your control in any place, cut it and then past it in the correct container. Repeat the step for any other control which is not in a good position
When you need to change the order of control in the same container use Bring To Front and Bring To Back from context menu
You have to set the splitcontainer's dock to none and instead use its anchor settings
I am trying to achieve functionality similar to that of a Popup, without using a Popup, but instead adorning my ContentControl with a basic adorner. Basically, I want the ContentControl to have an "overlay" effect, whereby it is the topmost object, above all other elements - similiar to that of the Popup control.
Here is the problem that I am running into, and I am hoping that someone can point out where I am going wrong:
I have a stand grid with two row definitions. The first row contains a UI element - for example, a rectangle. The second row contains a custom control that I have developed to emulate the functionality of a "drawer" sliding out. Basically, when I click on button, I am going to animate a TranslateTransform to "slide" my ContentControl "up". This works fine - except that it gets cropped underneath the rectange in the first row of the grid. If I remove the row definitions in the grid, then when the desired behavior is achieved - the ContentControl is moved "up" and partially "on top" of the rectangle. The rectangle is merely a place holder for what I am trying to achieve. I basically want to have a drawer type control that can slide out and be on top of all other controls.
I am somewhat new to using the Adorner class, so, I am hoping that someone can please point out where I am going wrong.
Thanks.
Chris
Change the parent of the adorner to the full grid, and not just your control. If you put a control in a grid row, and set the adorner to adorn the control, it will usually be clipped to that row because the control is.
I'm writing an XBAP with a complex Popup (Canvas Z-index of 99 with a grid on it...) that I would like to "attach" to the button that opens it and follow that button around wherever it goes on the screen. For example, if the button is in a ListBox or an XamDataGrid I would like the popup to follow the button as it scrolls through. If it is beneath an Expander I want it to stay attached to the button when the expander forces it to move, etc.
Any Ideas?
When using a Popup, neither PlacementTarget nor CustomPopupPlacementCallback is used after the popup has originally appeared. So any use of these properties will not allow the popup to track the button as it moves.
Several ways occur to me of achieving what you desire:
Attach a custom Adorner to the button and put the popup inside it. Disadvantage: Popup is not connected to Button or surrounding elements, so it won't inherit properties & DataContext from them.
Attach a custom Adorner to the button. This adorner will get measure and arrange calls when the button moves relative to the AdornerLayer, allowing you to manually update the Popup position. As long as your AdornerDecorator doesn't move relative to your Window (eg if it is the direct child of the Window), you can easily detect the AdornerLayer being moved by monitoring changes to Window size. Disadvantage: Complex to code & get right.
Don't use a Popup at all. Instead wrap the button in a <Grid> alongside a <Canvas> with zero width and height and the desired position. Inside the <Canvas> add the UserControl for the popup with an appropriate ZIndex. It will extend past the edge f the Canvas, which is just fine in WPF. Instead of using a Popup control just control the visibility of the UserControl. Disadvantage: Will not really be totally on top of all other objects, can't extend off edge of window (may not be an issue for XBAP, though).
I'm not sure if it will auto-update for you or not, but the PlacementTarget property allows you to specify a control to position the popup relative to. If that doesn't work, then maybe CustomPopupPlacementCallback will do the trick?
I have a WPF label contained in a FlowLayoutPanel and I want to determine the position of the label when clicked with the mouse. I am trying to position a pop-up control where near to the label and just need it's location.
The Popup control has this ability built-in. You can use the Placement, PlacementTarget, HorizontalOffset and VerticalOffset properties to control it.
That said, if you really want to find a point relative to another control, use the UIElement.TranslatePoint method.