private void CreateScrollbars()
{
hscrollbar = new ImplicitHScrollBar();
hscrollbar.Visible = false;
hscrollbar.ValueChanged += new EventHandler(HandleScrollBar);
hscrollbar.Height = SystemInformation.HorizontalScrollBarHeight;
hscrollbar.use_manual_thumb_size = true;
hscrollbar.Scroll += new ScrollEventHandler(HandleScrollEvent);
vscrollbar = new ImplicitVScrollBar();
vscrollbar.Visible = false;
vscrollbar.ValueChanged += new EventHandler(HandleScrollBar);
vscrollbar.Width = SystemInformation.VerticalScrollBarWidth;
vscrollbar.use_manual_thumb_size = true;
vscrollbar.Scroll += new ScrollEventHandler(HandleScrollEvent);
sizegrip = new SizeGrip(this);
sizegrip.Visible = false;
}
private new void UpdateSizeGripVisible ()
{
// Following link explains when to show size grip:
// http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=138687&SiteID=1
// if SizeGripStyle.Auto, only shown if form is shown using ShowDialog and is sizable
// if SizeGripStyle.Show, only shown if form is sizable
bool show = false;
switch (size_grip_style) {
case SizeGripStyle.Auto:
show = is_modal && (form_border_style == FormBorderStyle.Sizable || form_border_style == FormBorderStyle.SizableToolWindow);
break;
case SizeGripStyle.Hide:
show = false;
break;
case SizeGripStyle.Show:
show = (form_border_style == FormBorderStyle.Sizable || form_border_style == FormBorderStyle.SizableToolWindow);
break;
}
if (!show) {
if (size_grip != null && size_grip.Visible)
size_grip.Visible = false;
} else {
if (size_grip == null) {
size_grip = new SizeGrip (this);
size_grip.Virtual = true;
size_grip.FillBackground = false;
}
size_grip.Visible = true;
}
}
private void CreateScrollbars ()
{
hscrollbar = new ImplicitHScrollBar ();
hscrollbar.Visible = false;
hscrollbar.ValueChanged += new EventHandler (HandleScrollBar);
hscrollbar.Height = SystemInformation.HorizontalScrollBarHeight;
hscrollbar.use_manual_thumb_size = true;
hscrollbar.Scroll += new ScrollEventHandler (HandleScrollEvent);
vscrollbar = new ImplicitVScrollBar ();
vscrollbar.Visible = false;
vscrollbar.ValueChanged += new EventHandler (HandleScrollBar);
vscrollbar.Width = SystemInformation.VerticalScrollBarWidth;
vscrollbar.use_manual_thumb_size = true;
vscrollbar.Scroll += new ScrollEventHandler (HandleScrollEvent);
sizegrip = new SizeGrip (this);
sizegrip.Visible = false;
}
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);
}
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);
}