protected override void OnResize(EventArgs e)
{
base.OnResize(e);
if (Parent != null && Parent.IsHandleCreated)
{
XplatUI.InvalidateNC(Parent.Handle);
}
// Should probably make this into one loop
SizeScrollBars();
ArrangeWindows();
}
protected override void HandleTitleBarLeave(int x, int y)
{
base.HandleTitleBarLeave(x, y);
if (maximized_title_buttons != null)
{
maximized_title_buttons.MouseLeave(x, y);
}
if (IsMaximized)
{
XplatUI.InvalidateNC(form.MdiParent.Handle);
}
}
protected virtual void HandleTitleBarDown(int x, int y)
{
title_buttons.MouseDown(x, y);
if (!TitleButtons.AnyPushedTitleButtons && !IsMaximized)
{
state = State.Moving;
clicked_point = new Point(x, y);
if (form.Parent != null)
{
form.CaptureWithConfine(form.Parent);
}
else
{
form.Capture = true;
}
}
XplatUI.InvalidateNC(form.Handle);
}
internal void ActivateChild(Form form)
{
if (Controls.Count < 1)
{
return;
}
if (ParentForm.is_changing_visible_state > 0)
{
return;
}
Form current = (Form)Controls [0];
bool raise_deactivate = ParentForm.ActiveControl == current;
// We want to resize the new active form before it is
// made active to avoid flickering. Can't do it in the
// normal way (form.WindowState = Maximized) since it's not
// active yet and everything would just return to before.
// We also won't suspend layout, this way the layout will
// happen before the form is made active (and in many cases
// before it is visible, which avoids flickering as well).
MdiWindowManager wm = (MdiWindowManager)form.WindowManager;
if (current.WindowState == FormWindowState.Maximized && form.WindowState != FormWindowState.Maximized && form.Visible)
{
FormWindowState old_state = form.window_state;
SetWindowState(form, old_state, FormWindowState.Maximized, true);
wm.was_minimized = form.window_state == FormWindowState.Minimized;
form.window_state = FormWindowState.Maximized;
SetParentText(false);
}
form.BringToFront();
form.SendControlFocus(form);
SetWindowStates(wm);
if (current != form)
{
form.has_focus = false;
if (current.IsHandleCreated)
{
XplatUI.InvalidateNC(current.Handle);
}
if (form.IsHandleCreated)
{
XplatUI.InvalidateNC(form.Handle);
}
if (raise_deactivate)
{
MdiWindowManager current_wm = (MdiWindowManager)current.window_manager;
current_wm.RaiseDeactivate();
}
}
active_child = (Form)Controls [0];
if (active_child.Visible)
{
bool raise_activated = ParentForm.ActiveControl != active_child;
ParentForm.ActiveControl = active_child;
if (raise_activated)
{
MdiWindowManager active_wm = (MdiWindowManager)active_child.window_manager;
active_wm.RaiseActivated();
}
}
}
internal void SizeScrollBars()
{
if (lock_sizing)
{
return;
}
if (!IsHandleCreated)
{
return;
}
if (Controls.Count == 0 || ((Form)Controls [0]).WindowState == FormWindowState.Maximized)
{
if (hbar != null)
{
hbar.Visible = false;
}
if (vbar != null)
{
vbar.Visible = false;
}
if (sizegrip != null)
{
sizegrip.Visible = false;
}
return;
}
int right = 0;
int left = 0;
int top = 0;
int bottom = 0;
foreach (Form child in Controls)
{
if (!child.Visible)
{
continue;
}
if (child.Right > right)
{
right = child.Right;
}
if (child.Left < left)
{
left = child.Left;
}
if (child.Bottom > bottom)
{
bottom = child.Bottom;
}
if (child.Top < 0)
{
top = child.Top;
}
}
int available_width = ClientSize.Width;
int available_height = ClientSize.Height;
bool need_hbar = false;
bool need_vbar = false;
if (right - left > available_width || left < 0)
{
need_hbar = true;
available_height -= SystemInformation.HorizontalScrollBarHeight;
}
if (bottom - top > available_height || top < 0)
{
need_vbar = true;
available_width -= SystemInformation.VerticalScrollBarWidth;
if (!need_hbar && (right - left > available_width || left < 0))
{
need_hbar = true;
available_height -= SystemInformation.HorizontalScrollBarHeight;
}
}
if (need_hbar)
{
if (hbar == null)
{
hbar = new ImplicitHScrollBar();
Controls.AddImplicit(hbar);
}
hbar.Visible = true;
CalcHBar(left, right, need_vbar);
}
else if (hbar != null)
{
hbar.Visible = false;
}
if (need_vbar)
{
if (vbar == null)
{
vbar = new ImplicitVScrollBar();
Controls.AddImplicit(vbar);
}
vbar.Visible = true;
CalcVBar(top, bottom, need_hbar);
}
else if (vbar != null)
{
vbar.Visible = false;
}
if (need_hbar && need_vbar)
{
if (sizegrip == null)
{
sizegrip = new SizeGrip(this.ParentForm);
Controls.AddImplicit(sizegrip);
}
sizegrip.Location = new Point(hbar.Right, vbar.Bottom);
sizegrip.Visible = true;
XplatUI.SetZOrder(sizegrip.Handle, vbar.Handle, false, false);
}
else if (sizegrip != null)
{
sizegrip.Visible = false;
}
XplatUI.InvalidateNC(Handle);
}
