/// <summary>
/// Creates image from a user-selected area of screen pixels. Or gets single pixel color, or just rectangle.
/// Returns false if cancelled.
/// </summary>
/// <param name="result">Receives results.</param>
/// <param name="flags"></param>
/// <param name="toolWindow">Owner window. Temporarily hides it and its owner windows.</param>
/// <remarks>
/// Gets all screen pixels and shows in a full-screen topmost window, where the user can select an area.
/// </remarks>
public static bool CaptureUI(out WICResult result, WICFlags flags = 0, AnyWnd toolWindow = default)
{
result = default;
switch (flags & (WICFlags.Image | WICFlags.Color | WICFlags.Rectangle))
{
case 0:
case WICFlags.Image:
case WICFlags.Color:
case WICFlags.Rectangle: break;
default: throw new ArgumentException();
}
AWnd[] aw = null; AWnd wTool = default;
try {
if (!toolWindow.IsEmpty)
{
wTool = toolWindow.Wnd;
aw = wTool.Get.OwnersAndThis(true);
foreach (var w in aw)
{
w.ShowLL(false);
}
using (new AInputBlocker(BIEvents.MouseClicks)) ATime.SleepDoEvents(300); //time for animations
}
g1:
RECT rs = SystemInformation.VirtualScreen;
//RECT rs = AScreen.Primary.Bounds; //for testing, to see Write output in other screen
Bitmap bs;
bool windowPixels = flags.HasAny(WICFlags.WindowDC | WICFlags.PrintWindow);
if (windowPixels)
{
if (!_WaitForHotkey("Press F3 to select window from mouse pointer."))
{
return(false);
}
var w = AWnd.FromMouse(WXYFlags.NeedWindow);
w.GetClientRect(out var rc, inScreen: true);
using var bw = Capture(w, w.ClientRect, flags.Has(WICFlags.PrintWindow));
bs = new Bitmap(rs.Width, rs.Height);
using var g = Graphics.FromImage(bs);
g.Clear(Color.Black);
g.DrawImage(bw, rc.left, rc.top);
}
else
{
bs = Capture(rs);
}
var f = new _Form(bs, flags);
f.Bounds = rs;
switch (f.ShowDialog())
{
case DialogResult.OK: break;
case DialogResult.Retry:
if (!windowPixels && !_WaitForHotkey("Press F3 when ready for new screenshot."))
{
return(false);
}
goto g1;
default: return(false);
}
var r = f.Result;
r.wnd = _WindowFromRect(r);
result = r;
}
finally {
if (aw != null)
{
foreach (var w in aw)
{
w.ShowLL(true);
}
if (wTool.IsAlive)
{
wTool.ShowNotMinimized();
wTool.ActivateLL();
}
}
}
return(true);
}
