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C# Screen Class member methods cannot open form on secondary display

There are some methods from the Screen class to retrieve the respective screen, which contains the most area of a control.
They are the:
Screen.FromRectangle(Rectangle rect)
Screen.FromControl(Control control)
Screen.FromHandle(IntPtr hwnd)
Screen.FromPoint(Point point)
The issue here is that I have a problem getting my second Form to be opened in the second monitor. It kept on displaying only on the primary screen. According to the answer from here, the suspect is that the DpiAware was not enabled. However, the problem was still not fixed even after I have enabled the DpiAware.
To help me to check what was going on, I've added code for debugging. Then, I called/ opened the popup menu on \\\\.\\DISPLAY2. Inside of the debug console, the chosen Screen for FromPoint() was written \\\\.\\DISPLAY2. However, the popup menu was still opened on \\\\.\\DISPLAY1. Can anyone help me with this issue, please?
Below are the codes example:
Under main form class:
//mouseup event handler
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
//if RMB clicked
if(e.Button == MouseButtons.Right)
{
//----set PopupMenu form location----
popupMenuObj.Location = popupMenuObj.popupMenuLocation((sender as Control).PointToScreen(e.Location));
//----set PopupMenu form location----
//process the form location
popupMenuObj.Location = popupMenuObj.processFormLocation(popupMenuObj.Location);
//----set PopupMenu cursor location----
Cursor.Position = popupMenuObj.middleOfPopupMenu(popupMenuObj.Location);
//----set PopupMenu cursor location----
//----display the popup menu----
popupMenuObj.displayPopupMenu(1);
//----display the popup menu----
}
}
Under popup menu class:
//to set cursor to middle of popup menu
public Point middleOfPopupMenu(Point mousePoint)
{
int theCenterWidth = this.Width / 2;
int theCenterHeight = this.Height / 2;
//set the mouse pointer location at middle of PopupMenu
mousePoint.X += theCenterWidth;
mousePoint.Y += theCenterHeight;
return Cursor.Position = mousePoint;
}
//to set popupmenu location
public Point popupMenuLocation(Point thePoint)
{
return this.Location = thePoint;
}
//set popup menu display status
public bool displayPopupMenu(int displayFlag)
{
switch(displayFlag)
{
case 1: //if argument 1 -> display the PopupMenu
this.Visible = true;
return true;
case 0: //if argument 0 -> close the PopupMenu
this.Visible = false;
return false;
default: //by default, no need to display
return false;
}
}
//to process if popupmenu opens exceeding the screen working area
public Point processFormLocation(Point currentPoint)
{
Point newPoint = new Point();
int selectedScrWidth, selectedScrHeight; //screen dimension of the selected screen
Screen selectedScreen;
int totalXPos, totalYPos; //where the form is located before exceed screen is handled
//---get screen where point is at---
selectedScreen = Screen.FromPoint(currentPoint);
Console.WriteLine("\nSelected screen info: {0}\n", selectedScreen); //for debugging purposes
//---get screen where point is at---
//---get selected screen dimension---
selectedScrWidth = selectedScreen.WorkingArea.Width;
selectedScrHeight = selectedScreen.WorkingArea.Height;
//---get selected screen dimension---
totalXPos = currentPoint.X + this.Width; //mouseXCoor + popupMenu width
totalYPos = currentPoint.Y + this.Height; //mouseXCoor + popupMenu height
//if exceed selected screen width and height
if ((totalXPos >= selectedScrWidth) && (totalYPos >= selectedScrHeight))
{
newPoint.X = selectedScrWidth - this.Width;
newPoint.Y = selectedScrHeight - this.Height;
}
//if exceed selected screen width
else if ((totalXPos >= selectedScrWidth))
{
newPoint.X = selectedScrWidth - this.Width;
newPoint.Y = currentPoint.Y;
}
//if exceed selected screen height
else if ((totalYPos >= selectedScrHeight))
{
newPoint.X = newPoint.X;
newPoint.Y = selectedScrHeight - this.Height;
}
else //if x exceed screen, just set the location as is
{
return this.Location = Cursor.Position;
}
return this.Location = newPoint;
}
Update 1:
As per Jimi's request under the comment section, after creating a simple test project based on given answer here, here's what I got:
Please note the reason why the code in the question from the previous thread has no Width, Height, and StartPosition = FormStartPosition.Manual defined was because the popup menu is from a class on another .cs file where, those specific properties have already been declared in the PopupMenu.Designer.cs file. Therefore, I don't feel like redefining was necessary.
Update 2:
Now that it works, a newer problem arises is that, only when popup menu exceeds right boundary of secondary display, the popup menu was displayed on primary screen. However this didn't occur when I try to open the popup menu when exceeding the height of secondary screen. Example is shown below:
Above is the case when I try to open the popup menu when exceeding the width of secondary screen. The popup menu opens at the right boundary of primary screen.
It however worked just fine when I tried the case for exceeding the height of secondary display.

Programmatically Scrolling is not working C# WinForm

i have one panel and i put a flow layout panel in the main panel and flow layout panel has many images. my UI looks like this
now i got a code which scroll the container in the panel. i mean the flow layout will scroll in main panel when i will place my mouse at the left or right most area on the main panel. their code is working i checked but when i place their code in my project then that is not working, i means scrolling is not working when i place my mouse at the left or right most area on the main panel.
here i am attaching main code which causes to scroll the flow layout panel inside in main panel
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x02000000; // Turn on WS_EX_COMPOSITED
return cp;
}
}
int _myval = 5;
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (e.Y < metroPanel1.Top || e.Y > metroPanel1.Top + metroPanel1.Height) return;
if (e.X <= metroPanel1.Left && e.X >= metroPanel1.Left - 40)
{
if (metroPanel1.HorizontalScroll.Value <= _myval)
{
metroPanel1.HorizontalScroll.Value = _myval;
}
else
{
metroPanel1.HorizontalScroll.Value -= _myval;
}
}
if (e.X <= (metroPanel1.Left + metroPanel1.Width + 40) && e.X >= (metroPanel1.Left + metroPanel1.Width))
{
metroPanel1.HorizontalScroll.Value += _myval;
}
}
i just do not understand this value 40 used here if (e.X <= metroPanel1.Left && e.X >= metroPanel1.Left - 40)
i guess i need to use different value rather than 40 but i used 10 & 20 but did not work.
here is my full project link from where anyone can download and see what is wrong in my routine which prevent the scrolling. here is the link https://onedrive.live.com/embed?cid=C4A6F16F34D7540A&resid=C4A6F16F34D7540A%21134&authkey=AM5Fq2gcFLtcw_A
so it is my request that please some one see my code and guide me what i need to change in code and why. thanks

When you want to scroll dont use
metroPanel1.HorizontalScroll.Value -= _myval;
or
metroPanel1.HorizontalScroll.Value += _myval;
but instead
_myval -= 5;
or _myval += 5;
metroPanel1.HorizontalScroll.Value = _myval;
metroPanel1.Refresh();
valter

Yes.
Yes, programmatically scrolling a FlowLayoutPanel is not working, if the Scrollbars are not shown, due to its AutoScroll being off.
Neither setting HorizontalScroll.Value (in any way) nor using
[DllImport("user32.dll")]
static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool bRedraw);
will do anything.
Not even doing this has any effect:
flowLayoutPanel1ScrollControlIntoView(someControlThatsOutOfSight);
So, as far as I can tell: Without active Scrollbar(s) no scrolling a FlowLayoutPanel!
The containing Panel can however indeed be scrolled the way valter shows. However my first tests showed even when using a double-buffered Panel subclass a terrible flicker..
Update:
I can't get the Panel to scroll reliably. I have checked up on the link and found that the behaviour is really much simpler than anything I had written: No up down scrolling, no edge detection, no speed detection, no direction detection. In fact there are two scroll zones and when the mouse is in one, it scrolls.. It also relies on the 'constant firing of the mousemove event bug', which only works for me when I don't want it..!
So, here is a solution that implements this behaviour and is, of course much shorter, than the original code.
I include a screenshot to show you the layout: You need two Panels and the FlowLayoutPanel.
The outer Panel is a little wider so that its right and left part work as the scroll zones.
The inner Panel contains the FLP; the FLP has AutoSize=true.
There is a timer scrollTimer with a fast Intervall of 5-10ms.
Here is the code:
int speed = 10;
int delta = 0;
private void panOuter_MouseMove(object sender, MouseEventArgs e)
{
delta = e.X < panOuter.Width / 2 ? speed : -speed;
scrollTimer.Start();
}
private void panOuter_MouseLeave(object sender, EventArgs e)
{
scrollTimer.Stop();
}
private void scrollTimer_Tick(object sender, EventArgs e)
{
int newLeft = FLP.Left + delta;
int alpha = panInner.ClientRectangle.Width - FLP.ClientRectangle.Width;
if (newLeft > 0) { newLeft = 0; scrollTimer.Stop(); }
else if ( newLeft < alpha)
{ newLeft = alpha; scrollTimer.Stop(); }
FLP.Left = newLeft;
}
That's practically all you need. Only in case you Dock or Anchor the outer Panel you should script the Resize event to keep the inner Panel centered!

Center UISegmentedControl within a UISearchBar

I am using the built-in search scope with a UISearchDisplayController, and I only have 2 segments.
The problem is that our design needs the buttons to be smaller and centered (it especially looks bad on iPad because the buttons are stretched really wide).
Is there a way to center the UISegmentedControl and make it smaller? I already have the UISegmentedControl pulled out by looping over subViews. And I can set the width of each segment with setWidth:forSegmentAtIndex, but the control is docked to the left. How can I center it?
PS - my app is MonoTouch (Xamarin.iOS), but Obj-C answers are welcome.

Are you adding this via IB or programmatically? In IB, I had to turn off "Autoresize Subviews" and do the resizing of the control dynamically via code. I put the controls I needed to resize into a view that I could bind to then center my control within that view. Here's a sample. I had 2 buttons that I put side-by-side in landscape mode, but it should give you an idea.
// get the current sizes of the things we are moving
CGRect saveRect = self.viewButtons.frame; // the enclosing view
CGRect addLocRect = self.buttonAddLocation.frame; // button 1
CGRect connectRect = self.buttonConnect.frame; // button 2
// This will be set below in one of the if-else branches
CGFloat buttonWidth = 0;
// determine the offset from the left/right based on device and orientation
int offsetLeft = 0;
int offsetRight = 0;
if ([self isIphone]) {
offsetLeft = (UIDeviceOrientationIsPortrait(toInterfaceOrientation)) ? OFFSET_LEFT_PORTRAIT_IPHONE : OFFSET_LEFT_LANDSCAPE_IPHONE;
offsetRight = (UIDeviceOrientationIsPortrait(toInterfaceOrientation)) ? OFFSET_RIGHT_PORTRAIT_IPHONE : OFFSET_RIGHT_LANDSCAPE_IPHONE;
} else {
offsetLeft = (UIDeviceOrientationIsPortrait(toInterfaceOrientation)) ? OFFSET_LEFT_PORTRAIT_IPAD : OFFSET_LEFT_LANDSCAPE_IPAD;
offsetRight = offsetLeft;
}
// change the size & location of the buttons to maximize the area for the location list
// no matter what orientation, the button frame will fill the bottom of the screen
saveRect.size.width = _windowWidth -offsetLeft - offsetRight;
// for Landscape, move the buttons to side-by-side at the bottom of the window
if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
// size & move the buttons to fit side-by-side
buttonWidth = (saveRect.size.width)*.4;
// addLocRect.origin.x += offset;
addLocRect.origin.y = saveRect.size.height - addLocRect.size.height ;
connectRect.origin.x = saveRect.size.width - buttonWidth - offsetRight;
connectRect.origin.y = saveRect.size.height - connectRect.size.height;
} else { // Portrait
// move the buttons down to the bottom of the frame, stacked
// size the buttons to be fully across the screen
buttonWidth = saveRect.size.width-2*offsetLeft;
addLocRect.origin.y = 0 ; // at the top of the button view
addLocRect.origin.x = offsetLeft;
connectRect.origin.y = saveRect.size.height - connectRect.size.height;
connectRect.origin.x = offsetLeft;
}
connectRect.size.width = buttonWidth;
addLocRect.size.width = buttonWidth;
self.buttonAddLocation.frame = addLocRect;
self.buttonConnect.frame = connectRect;

Silverlight: control (border, grid, etc) resize when drag in C#

I created (using c#) a grid with border & the parent layout is another grid. When I try to rezise dynamically, it doesn't give the expected behaviour.
I keep the start position (left-top) of border (with grid) fixed & only the right-bottom point is dragged to resize. In the Mouse move event, the width & height are changed depending on the current position.
1) But it always change the start point (left-top) when changing the width & height ?
2) When border get resized the child (grid) doesn't change its dimensions accordingly ? I cann't find any stretching method. But if border is moved, then the child grid moves with it.
Point offsetParent;
.....
private void MouseMoveEvent(object sender, MouseEventArgs e)
{
if (bIsMouseDown)
{
ResizeControl(e);
offsetParent = e.GetPosition(parentGrid); //reset offset to current
}
}
private void ResizeControl(MouseEventArgs e)
{
// get current point
Point CurPosParent = e.GetPosition(parentGrid);
// current & new position difference
Point diff = new Point(CurPosParent.X - offsetParent.X, CurPosParent.Y - offsetParent.Y);
// keep start point (left-top position) of border fixed
// adjust only width & height of border
border1.Width += diff.X; //changes start point (left-top position) ????
border1.Height += diff.Y;
}

Found out my mistake from this link Object Positioning and Layout
Now I use a Canvas as the parent. Width & height of border & grid can be changed without changing the start point.
Point offsetParent;
.....
private void MouseMoveEvent(object sender, MouseEventArgs e)
{
if (bIsMouseDown)
{
ResizeControl(e);
offsetParent = e.GetPosition(parentCanvas); //reset offset to current
}
}
private void ResizeControl(MouseEventArgs e)
{
// get current point
Point CurPosParent = e.GetPosition(parentCanvas);
// current & new position difference
Point diff = new Point(CurPosParent.X - offsetParent.X, CurPosParent.Y - offsetParent.Y);
// keep start point (left-top position) of border fixed
// adjust only width & height of border
border1.Width += diff.X;
border1.Height += diff.Y;
grid1.Width += diff.X;
grid1.Height += diff.Y;
}

User Drawn Controls: the MSN chat window

I'm wondering about the famous MSN chat clients conversation windows! I'm sure there must be a lot of different aspects but I'd like to focus on those little sliding panes. For instance where the pictures of the people in the conversation are displayed. When you click the collapse button the pictures disappear and the panel gracefully slides in, and when you click it again to expand, it slides out and the pictures are smoothly faded in.
How would one go about customly drawing a control in WinForms that had similar behaviour?

This should give you an idea how animate your width.
int _collapsedWidth;
int _fullWidth;
float _speed;
float _acurateWidth;
System.Diagnostics.Stopwatch _stopwatch = new Stopwatch ();
int _animationDirection;
AnimatedControl (){
Application.Idle += ApplicationIdle;
}
void Expand (){
_animationDirection = 1;
_stopwatch.Start();
}
void ApplicationIdle (object sender, EventArgs e){
if (_animation.Direction == 0)
return;
float delta = _stopwatch.Elapsed.TotalMilliseconds * _speed;
_acurateWidth += delta;
if (_acurateWidth < _collapsedWidth)
{
_animationDirection = 0;
_acurateWidth = _collapsedWidth;
_stopwatch.Stop();
}
else if (_acurateWidth > _fullWidth)
{
_animationDirection = 0;
_acurateWidth = _fullWidth;
_stopwatch.Stop();
}
_stopwatch.Reset();
this.Width = (int)System.Math.Round(_acurateWidth , MidpointRounding.AwayFromZero);
this.Invalidate (); // May not need this
}
and for the pictures, somthing similar but using translucent images, you might want to make a new control with a transparent background color for them as well depending how you want to paint things.
You can then put this control into one of the LayoutPanel controls to move your other controls around in the form to match the width.