/// <summary>
/// Sets an anchor AND a margin preset. This is most likely the method you want.
///
/// </summary>
/// <remarks>
/// Note that the current size and minimum size of the control affects how
/// each of the margins will be set, so if your control needs to shrink beyond its
/// current size / min size, you should either not call this method or only call it when your
/// control has a size of (0, 0). Otherwise your control's size will never be able
/// to go below the size implied by the margins set in this method.
/// </remarks>
public static void SetAnchorAndMarginPreset(Control control, LayoutPreset preset,
LayoutPresetMode mode = LayoutPresetMode.MinSize,
int margin = 0)
{
SetAnchorPreset(control, preset);
SetMarginsPreset(control, preset, mode, margin);
}
/// <summary>
/// Changes all the margins of a control at once to common presets.
/// The result is that the control is laid out as specified by the preset.
///
/// Note that the current size and minimum size of the control affects how
/// each of the margins will be set, so if your control needs to shrink beyond its
/// current size / min size, you should either not call this method or only call it when your
/// control has a size of (0, 0). Otherwise your control's size will never be able
/// to go below the size implied by the margins set in this method.
/// </summary>
/// <param name="preset"></param>
/// <param name="resizeMode"></param>
/// <param name="margin">Some extra margin to add depending on the preset chosen.</param>
public static void SetMarginsPreset(Control control, LayoutPreset preset,
LayoutPresetMode resizeMode = LayoutPresetMode.MinSize,
int margin = 0)
{
control.Measure(Vector2.Infinity);
var newSize = control.Size;
var minSize = control.DesiredSize;
if ((resizeMode & LayoutPresetMode.KeepWidth) == 0)
{
newSize = new Vector2(minSize.X, newSize.Y);
}
if ((resizeMode & LayoutPresetMode.KeepHeight) == 0)
{
newSize = new Vector2(newSize.X, minSize.Y);
}
var parentSize = control.Parent?.Size ?? Vector2.Zero;
var anchorLeft = control.GetValue <float>(AnchorLeftProperty);
var anchorTop = control.GetValue <float>(AnchorBottomProperty);
var anchorRight = control.GetValue <float>(AnchorRightProperty);
var anchorBottom = control.GetValue <float>(AnchorBottomProperty);
float marginLeft;
float marginTop;
float marginRight;
float marginBottom;
// Left Margin.
switch (preset)
{
case LayoutPreset.TopLeft:
case LayoutPreset.BottomLeft:
case LayoutPreset.CenterLeft:
case LayoutPreset.LeftWide:
case LayoutPreset.HorizontalCenterWide:
case LayoutPreset.Wide:
case LayoutPreset.TopWide:
case LayoutPreset.BottomWide:
// The AnchorLeft bit is to reverse the effect of anchors,
// So that the preset result is the same no matter what margins are set.
marginLeft = parentSize.X * (0 - anchorLeft) + margin;
break;
case LayoutPreset.CenterTop:
case LayoutPreset.CenterBottom:
case LayoutPreset.Center:
case LayoutPreset.VerticalCenterWide:
marginLeft = parentSize.X * (0.5f - anchorLeft) - newSize.X / 2;
break;
case LayoutPreset.TopRight:
case LayoutPreset.BottomRight:
case LayoutPreset.CenterRight:
case LayoutPreset.RightWide:
marginLeft = parentSize.X * (1 - anchorLeft) - newSize.X - margin;
break;
default:
throw new ArgumentOutOfRangeException(nameof(preset), preset, null);
}
// Top Anchor.
switch (preset)
{
case LayoutPreset.TopLeft:
case LayoutPreset.TopRight:
case LayoutPreset.LeftWide:
case LayoutPreset.TopWide:
case LayoutPreset.Wide:
case LayoutPreset.RightWide:
case LayoutPreset.CenterTop:
case LayoutPreset.VerticalCenterWide:
marginTop = parentSize.Y * (0 - anchorTop) + margin;
break;
case LayoutPreset.CenterLeft:
case LayoutPreset.CenterRight:
case LayoutPreset.HorizontalCenterWide:
case LayoutPreset.Center:
marginTop = parentSize.Y * (0.5f - anchorTop) - newSize.Y / 2;
break;
case LayoutPreset.CenterBottom:
case LayoutPreset.BottomLeft:
case LayoutPreset.BottomRight:
case LayoutPreset.BottomWide:
marginTop = parentSize.Y * (1 - anchorTop) - newSize.Y - margin;
break;
default:
throw new ArgumentOutOfRangeException(nameof(preset), preset, null);
}
// Right Anchor.
switch (preset)
{
case LayoutPreset.TopLeft:
case LayoutPreset.CenterLeft:
case LayoutPreset.BottomLeft:
case LayoutPreset.LeftWide:
marginRight = parentSize.X * (0 - anchorRight) + newSize.X + margin;
break;
case LayoutPreset.CenterTop:
case LayoutPreset.CenterBottom:
case LayoutPreset.Center:
case LayoutPreset.VerticalCenterWide:
marginRight = parentSize.X * (0.5f - anchorRight) + newSize.X;
break;
case LayoutPreset.CenterRight:
case LayoutPreset.TopRight:
case LayoutPreset.Wide:
case LayoutPreset.HorizontalCenterWide:
case LayoutPreset.TopWide:
case LayoutPreset.BottomWide:
case LayoutPreset.RightWide:
case LayoutPreset.BottomRight:
marginRight = parentSize.X * (1 - anchorRight) - margin;
break;
default:
throw new ArgumentOutOfRangeException(nameof(preset), preset, null);
}
// Bottom Anchor.
switch (preset)
{
case LayoutPreset.TopWide:
case LayoutPreset.TopLeft:
case LayoutPreset.TopRight:
case LayoutPreset.CenterTop:
marginBottom = parentSize.Y * (0 - anchorBottom) + newSize.Y + margin;
break;
case LayoutPreset.CenterLeft:
case LayoutPreset.CenterRight:
case LayoutPreset.Center:
case LayoutPreset.HorizontalCenterWide:
marginBottom = parentSize.Y * (0.5f - anchorBottom) + newSize.Y;
break;
case LayoutPreset.CenterBottom:
case LayoutPreset.BottomLeft:
case LayoutPreset.BottomRight:
case LayoutPreset.LeftWide:
case LayoutPreset.Wide:
case LayoutPreset.RightWide:
case LayoutPreset.VerticalCenterWide:
case LayoutPreset.BottomWide:
marginBottom = parentSize.Y * (1 - anchorBottom) - margin;
break;
default:
throw new ArgumentOutOfRangeException(nameof(preset), preset, null);
}
control.SetValue(MarginLeftProperty, marginLeft);
control.SetValue(MarginTopProperty, marginTop);
control.SetValue(MarginRightProperty, marginRight);
control.SetValue(MarginBottomProperty, marginBottom);
}
