private int AdjustScroll(Message m, int pos, int maxPos, bool horizontal)
{
switch (System.Windows.Forms.NativeMethods.Util.LOWORD(m.WParam))
{
case 0:
if (pos <= 5)
{
pos = 0;
return(pos);
}
pos -= 5;
return(pos);
case 1:
if (pos >= (maxPos - 5))
{
pos = maxPos;
return(pos);
}
pos += 5;
return(pos);
case 2:
if (pos <= 100)
{
pos = 0;
return(pos);
}
pos -= 100;
return(pos);
case 3:
if (pos >= (maxPos - 100))
{
pos = maxPos;
return(pos);
}
pos += 100;
return(pos);
case 4:
case 5:
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
cbSize = Marshal.SizeOf(typeof(System.Windows.Forms.NativeMethods.SCROLLINFO)),
fMask = 0x10
};
int fnBar = horizontal ? 0 : 1;
if (!System.Windows.Forms.SafeNativeMethods.GetScrollInfo(new HandleRef(this, m.HWnd), fnBar, si))
{
pos = System.Windows.Forms.NativeMethods.Util.HIWORD(m.WParam);
return(pos);
}
pos = si.nTrackPos;
return(pos);
}
}
return(pos);
}
private int ScrollThumbPosition(int fnBar)
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
fMask = 0x10
};
System.Windows.Forms.SafeNativeMethods.GetScrollInfo(new HandleRef(this, base.Handle), fnBar, si);
return(si.nTrackPos);
}
internal void UpdateScrollInfo()
{
if (this.parent.IsHandleCreated && this.visible)
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
cbSize = Marshal.SizeOf(typeof(System.Windows.Forms.NativeMethods.SCROLLINFO)),
fMask = 0x17,
nMin = this.minimum,
nMax = this.maximum,
nPage = this.parent.AutoScroll ? this.PageSize : this.LargeChange,
nPos = this.value,
nTrackPos = 0
};
UnsafeNativeMethods.SetScrollInfo(new HandleRef(this.parent, this.parent.Handle), this.Orientation, si, true);
}
}
internal void UpdateScrollInfo()
{
if (this.parent.IsHandleCreated && this.visible)
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
cbSize = Marshal.SizeOf(typeof(System.Windows.Forms.NativeMethods.SCROLLINFO)),
fMask = 0x17,
nMin = this.minimum,
nMax = this.maximum,
nPage = this.parent.AutoScroll ? this.PageSize : this.LargeChange,
nPos = this.value,
nTrackPos = 0
};
UnsafeNativeMethods.SetScrollInfo(new HandleRef(this.parent, this.parent.Handle), this.Orientation, si, true);
}
}
internal void SetVirtualSizeNoInvalidate(Size value)
{
this.virtualSize = value;
this.SetPositionNoInvalidate(this.position);
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
fMask = 3,
nMin = 0,
nMax = Math.Max(base.Height, this.virtualSize.Height) - 1,
nPage = base.Height
};
System.Windows.Forms.UnsafeNativeMethods.SetScrollInfo(new HandleRef(this, base.Handle), 1, si, true);
si.fMask = 3;
si.nMin = 0;
si.nMax = Math.Max(base.Width, this.virtualSize.Width) - 1;
si.nPage = base.Width;
System.Windows.Forms.UnsafeNativeMethods.SetScrollInfo(new HandleRef(this, base.Handle), 0, si, true);
}
protected void UpdateScrollInfo()
{
if (base.IsHandleCreated && base.Enabled)
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
cbSize = Marshal.SizeOf(typeof(System.Windows.Forms.NativeMethods.SCROLLINFO)),
fMask = 0x17,
nMin = this.minimum,
nMax = this.maximum,
nPage = this.LargeChange
};
if (this.RightToLeft == RightToLeft.Yes)
{
si.nPos = this.ReflectPosition(this.value);
}
else
{
si.nPos = this.value;
}
si.nTrackPos = 0;
System.Windows.Forms.UnsafeNativeMethods.SetScrollInfo(new HandleRef(this, base.Handle), 2, si, true);
}
}
public static extern bool GetScrollInfo(HandleRef hWnd, int fnBar, [In, Out] System.Windows.Forms.NativeMethods.SCROLLINFO si);
private void CustomDraw(ref Message m)
{
TreeNode node;
System.Windows.Forms.NativeMethods.NMTVCUSTOMDRAW lParam = (System.Windows.Forms.NativeMethods.NMTVCUSTOMDRAW) m.GetLParam(typeof(System.Windows.Forms.NativeMethods.NMTVCUSTOMDRAW));
switch (lParam.nmcd.dwDrawStage)
{
case 0x10001:
node = this.NodeFromHandle(lParam.nmcd.dwItemSpec);
if (node != null)
{
int uItemState = lParam.nmcd.uItemState;
if (this.drawMode == TreeViewDrawMode.OwnerDrawText)
{
lParam.clrText = lParam.clrTextBk;
Marshal.StructureToPtr(lParam, m.LParam, false);
m.Result = (IntPtr) 0x12;
return;
}
if (this.drawMode == TreeViewDrawMode.OwnerDrawAll)
{
DrawTreeNodeEventArgs args;
using (Graphics graphics = Graphics.FromHdcInternal(lParam.nmcd.hdc))
{
Rectangle rowBounds = node.RowBounds;
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
cbSize = Marshal.SizeOf(typeof(System.Windows.Forms.NativeMethods.SCROLLINFO)),
fMask = 4
};
if (System.Windows.Forms.UnsafeNativeMethods.GetScrollInfo(new HandleRef(this, base.Handle), 0, si))
{
int nPos = si.nPos;
if (nPos > 0)
{
rowBounds.X -= nPos;
rowBounds.Width += nPos;
}
}
args = new DrawTreeNodeEventArgs(graphics, node, rowBounds, (TreeNodeStates) uItemState);
this.OnDrawNode(args);
}
if (!args.DrawDefault)
{
m.Result = (IntPtr) 4;
return;
}
}
OwnerDrawPropertyBag itemRenderStyles = this.GetItemRenderStyles(node, uItemState);
bool flag = false;
Color foreColor = itemRenderStyles.ForeColor;
Color backColor = itemRenderStyles.BackColor;
if ((itemRenderStyles != null) && !foreColor.IsEmpty)
{
lParam.clrText = ColorTranslator.ToWin32(foreColor);
flag = true;
}
if ((itemRenderStyles != null) && !backColor.IsEmpty)
{
lParam.clrTextBk = ColorTranslator.ToWin32(backColor);
flag = true;
}
if (flag)
{
Marshal.StructureToPtr(lParam, m.LParam, false);
}
if ((itemRenderStyles == null) || (itemRenderStyles.Font == null))
{
break;
}
System.Windows.Forms.SafeNativeMethods.SelectObject(new HandleRef(lParam.nmcd, lParam.nmcd.hdc), new HandleRef(itemRenderStyles, itemRenderStyles.FontHandle));
m.Result = (IntPtr) 2;
return;
}
m.Result = (IntPtr) 4;
return;
case 0x10002:
if (this.drawMode != TreeViewDrawMode.OwnerDrawText)
{
break;
}
node = this.NodeFromHandle(lParam.nmcd.dwItemSpec);
if (node != null)
{
using (Graphics graphics2 = Graphics.FromHdcInternal(lParam.nmcd.hdc))
{
Rectangle bounds = node.Bounds;
Size size = TextRenderer.MeasureText(node.Text, node.TreeView.Font);
Point location = new Point(bounds.X - 1, bounds.Y);
bounds = new Rectangle(location, new Size(size.Width, bounds.Height));
DrawTreeNodeEventArgs e = new DrawTreeNodeEventArgs(graphics2, node, bounds, (TreeNodeStates) lParam.nmcd.uItemState);
this.OnDrawNode(e);
if (e.DrawDefault)
{
TreeNodeStates state = e.State;
Font font = (node.NodeFont != null) ? node.NodeFont : node.TreeView.Font;
Color color3 = (((state & TreeNodeStates.Selected) == TreeNodeStates.Selected) && node.TreeView.Focused) ? SystemColors.HighlightText : ((node.ForeColor != Color.Empty) ? node.ForeColor : node.TreeView.ForeColor);
if ((state & TreeNodeStates.Selected) == TreeNodeStates.Selected)
{
graphics2.FillRectangle(SystemBrushes.Highlight, bounds);
ControlPaint.DrawFocusRectangle(graphics2, bounds, color3, SystemColors.Highlight);
TextRenderer.DrawText(graphics2, e.Node.Text, font, bounds, color3, TextFormatFlags.Default);
}
else
{
using (Brush brush = new SolidBrush(this.BackColor))
{
graphics2.FillRectangle(brush, bounds);
}
TextRenderer.DrawText(graphics2, e.Node.Text, font, bounds, color3, TextFormatFlags.Default);
}
}
}
m.Result = (IntPtr) 0x20;
return;
}
return;
case 1:
m.Result = (IntPtr) 0x20;
return;
}
m.Result = IntPtr.Zero;
}
private int ScrollThumbPosition(int fnBar)
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
fMask = 0x10
};
System.Windows.Forms.SafeNativeMethods.GetScrollInfo(new HandleRef(this, base.Handle), fnBar, si);
return si.nTrackPos;
}
private int AdjustScroll(Message m, int pos, int maxPos, bool horizontal)
{
switch (System.Windows.Forms.NativeMethods.Util.LOWORD(m.WParam))
{
case 0:
if (pos <= 5)
{
pos = 0;
return pos;
}
pos -= 5;
return pos;
case 1:
if (pos >= (maxPos - 5))
{
pos = maxPos;
return pos;
}
pos += 5;
return pos;
case 2:
if (pos <= 100)
{
pos = 0;
return pos;
}
pos -= 100;
return pos;
case 3:
if (pos >= (maxPos - 100))
{
pos = maxPos;
return pos;
}
pos += 100;
return pos;
case 4:
case 5:
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
cbSize = Marshal.SizeOf(typeof(System.Windows.Forms.NativeMethods.SCROLLINFO)),
fMask = 0x10
};
int fnBar = horizontal ? 0 : 1;
if (!System.Windows.Forms.SafeNativeMethods.GetScrollInfo(new HandleRef(this, m.HWnd), fnBar, si))
{
pos = System.Windows.Forms.NativeMethods.Util.HIWORD(m.WParam);
return pos;
}
pos = si.nTrackPos;
return pos;
}
}
return pos;
}
internal void SetVirtualSizeNoInvalidate(Size value)
{
this.virtualSize = value;
this.SetPositionNoInvalidate(this.position);
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
fMask = 3,
nMin = 0,
nMax = Math.Max(base.Height, this.virtualSize.Height) - 1,
nPage = base.Height
};
System.Windows.Forms.UnsafeNativeMethods.SetScrollInfo(new HandleRef(this, base.Handle), 1, si, true);
si.fMask = 3;
si.nMin = 0;
si.nMax = Math.Max(base.Width, this.virtualSize.Width) - 1;
si.nPage = base.Width;
System.Windows.Forms.UnsafeNativeMethods.SetScrollInfo(new HandleRef(this, base.Handle), 0, si, true);
}
private void DoScroll(ScrollEventType type)
{
if (this.RightToLeft == RightToLeft.Yes)
{
switch (type)
{
case ScrollEventType.SmallDecrement:
type = ScrollEventType.SmallIncrement;
break;
case ScrollEventType.SmallIncrement:
type = ScrollEventType.SmallDecrement;
break;
case ScrollEventType.LargeDecrement:
type = ScrollEventType.LargeIncrement;
break;
case ScrollEventType.LargeIncrement:
type = ScrollEventType.LargeDecrement;
break;
case ScrollEventType.First:
type = ScrollEventType.Last;
break;
case ScrollEventType.Last:
type = ScrollEventType.First;
break;
}
}
int newValue = this.value;
int oldValue = this.value;
switch (type)
{
case ScrollEventType.SmallDecrement:
newValue = Math.Max(this.value - this.SmallChange, this.minimum);
break;
case ScrollEventType.SmallIncrement:
newValue = Math.Min((int)(this.value + this.SmallChange), (int)((this.maximum - this.LargeChange) + 1));
break;
case ScrollEventType.LargeDecrement:
newValue = Math.Max(this.value - this.LargeChange, this.minimum);
break;
case ScrollEventType.LargeIncrement:
newValue = Math.Min((int)(this.value + this.LargeChange), (int)((this.maximum - this.LargeChange) + 1));
break;
case ScrollEventType.ThumbPosition:
case ScrollEventType.ThumbTrack:
{
System.Windows.Forms.NativeMethods.SCROLLINFO si = new System.Windows.Forms.NativeMethods.SCROLLINFO {
fMask = 0x10
};
System.Windows.Forms.SafeNativeMethods.GetScrollInfo(new HandleRef(this, base.Handle), 2, si);
if (this.RightToLeft != RightToLeft.Yes)
{
newValue = si.nTrackPos;
break;
}
newValue = this.ReflectPosition(si.nTrackPos);
break;
}
case ScrollEventType.First:
newValue = this.minimum;
break;
case ScrollEventType.Last:
newValue = (this.maximum - this.LargeChange) + 1;
break;
}
ScrollEventArgs se = new ScrollEventArgs(type, oldValue, newValue, this.scrollOrientation);
this.OnScroll(se);
this.Value = se.NewValue;
}
