I really, really want your help. My project is next.
I have a pictureBox1, which is parent for all other pictureBoxes that I create with array. These pictureBoxes are smaller that I can move them on the pictureBox1.
For every newly created pictureBox I set next properties:
PB[i]->Parent = pictureBox1
PB[i]->BackColor = Color::Transparent
At the same time I set to them PNG file, whose backcolor is also transparent.
With a single pictureBox on pictureBox1 it is OK. But when two or more pictureBoxes are located together they just block each other's content. I tried to bring to the front, but it ain't work. Which pictureBox is on top it blocks pictureBox below it.
How can I set or make a mutual transparency for pictureBoxes, while their parent is one, pictureBox1?
Related
I am pretty new with Fabricjs.
I want to create a project where you user can put their design on the blueprint containing a place holder inside.
The dash rectangle inside the T-shirt shaped is called place holder
The problem is that, I want to set the position and the size of the place holder to fit with the T-shirt shaped, I can change the canvas in css, but the selectable part (the purple shadow go after the mouse when I drag the it inside the place holder - sorry, I don't know how to call it) is still keep the same size and the same position.
Is there any way to change the size and the position of it, the real position of canvas?
I think I must be missing something obvious, but I'm unable to find this after several hours of searching. Is there no way to use a PictureBox or other control to contain an image with partial transparent/alpha-blended pixels, and place that over another image and have the blending be based on the image under it?
For example, this produces the results I want:
Place a panel on a form.
Add an OnPaint handler.
In the OnPaint handler draw 1 PNG, then draw another PNG over it, using Graphics.DrawImage for both.
This does not:
Place a PictureBox on a form and set it to a PNG.
Place another PictureBox on the form and set it to a PNG.
Place the 2nd picture box over the first.
...even if the 2nd picture box is just empty and has a background color of Transparent, it still covers the picture below it.
I've read this stems from all winform controls being windows, so by nature they aren't transparent.
...but even the 15 year old platform I'm migrating from, Borland's VCL, had several windowless controls, so it's hard to imaging winforms doesn't at least have some easy solution?
My first example above is one answer, true, but that adds a lot of work when you can only use one big panel and draw all of your "controls" inside of it. Much nicer if you can have separate controls with separate mouse events/etc. Even if not an image control, and a control I have to draw myself, that would be fine, as long as I can just put one image in each control. In VCL they called this a "paint box", just a rectangle area you could place on a form and draw whatever you want on it. Has it's own mouse events, Bounds, etc. If you don't draw anything in it, it is like it's not even there (100% transparent) other than the fact it still gets mouse events, so can be used as a "hot spot" or "target" as well.
The PictureBox control supports transparency well, just set its BackColor property to Transparent. Which will make the pixels of its Parent visible as the background.
The rub is that the designer won't let you make the 2nd picture box a child of the 1st one. All you need is a wee bit of code in the constructor to re-parent it. And give it a new Location since that is relative from the parent. Like this:
public Form1() {
InitializeComponent();
pictureBox1.Controls.Add(pictureBox2);
pictureBox2.Location = new Point(0, 0);
pictureBox2.BackColor = Color.Transparent;
}
Don't hesitate to use OnPaint() btw.
Sorry, I just found this... once I decided to Google for "winforms transparent panel" instead of the searches I was doing before, the TransPictureBox example show seems to do exactly what I need:
Transparency Problem by Overlapped PictureBox's at C#
Looks like there are 2 parts to it:
Set WS_EX_TRANSPARENT for the window style
Override the "draw background" method (or optionally could probably make the control style Opaque).
I'm developing a multi track video player in wpf and need to be able to copy the video that is playing in one grid layout of the main window into a seperate window that will go out of a projector. The videos are loaded and drawn onto rectangles using drawing brush and are added to a grid. I can't call clone on the rectangle, or the grid, or the canvas, so I'm currently resorting to copying the drawing brushes, passing them through to the otherwindow class and reassigning them to newly drawn rectangles.
However, this gets even worse as I'm 'cross-fading' between two video by drawing another rectangle with a new video in front, then changing the opacity value of the front video to gradually block out the one behind. So I now have two brushes on two rectangles tied to storyboards to animate, and I'm having to pass everything through and basically compute everything twice.
Is there any sensible way of doing this? I'd love to be able to literally grab the pixels from one area of the main video and display them in the second window, but everything seems abstracted away.
Any suggestions would be a massive help
Have you looked at VisualBrush?
I just want ask for your comments/suggestions on how to create a customized listview (if that's a good implementation) in WPF that displays images coming from a table from a database (more like a playlist) that rotates similar to a film (moving horizontally - on loop)
Any ideas?
If you have a list of Images, you can create an Image control for each one, put each Image control in a horizontal StackPanel, put the StackPanel inside a Canvas (of whatever size of the "film"), and animate the Left property of the Canvas to have the images roll.
Of course, if you need that the images wrap (the first one after the last one), you could forget about the StackPanel and move each Image separately.
I have stack panel with custom controls in it. User can add or remove the items.
I have attached MouseDragElementBehavior to each item. So now user can move them within the stack panel.
However the items now are arranged on arbitrary manner. Is a mess really. They stay where the user left them.
What I need now is to make them to be stacked as the stack panel supposed to be... Nicely one by one...
So I need to simply let user change the order of items by using drag / drop operation but items has to be stacked precisely.
There is DragFinished event, but I dont really see how the Behavior moves items. I thought it is Margin it changes but margins stays 0... I dont know what to do next.
Appreciate little help.
MouseDragElementBehavior does its work using a Transform on the RenderTransform property of the attached element (i.e. the one the behavior is applied to) (the exact type of transform depends on the state of the RenderTransform property but it will either be a TranslateTransform or a MatrixTransform).
The transform is not reset when you finish dragging (nor would you want it to be because the element would snap back to its position in the StackPanel when you started dragging) and this is why the element stays where "the user left them".
To change the items position in the StackPanel in the way you are talking about you will have to use the DragFinished event. What you probably want to do is work out where in the StackPanel the element will end up (as a result of the drag, i.e. which element in the panel it will "push" down) then create an animation to animate the element from its current position (where the user released the drag) to that final position in the StackPanel and another animation to move the "pushed" element in to its new position in the StackPanel (VisualTreeHelper can probably help here (I think)). Once those animations are finished just set the new index within the StackPanel for each item and remove the RenderTransform translation.