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//
// DefaultLayout.cs
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2006 Jonathan Pobst
//
// Authors:
// Jonathan Pobst ([email protected])
// Stefan Noack ([email protected])
//
using System;
using System.Drawing;
namespace ShiftUI.Layout
{
class DefaultLayout : LayoutEngine
{
void LayoutDockedChildren (Widget parent, Widget[] Widgets)
{
Rectangle space = parent.DisplayRectangle;
MdiClient mdi = null;
// Deal with docking; go through in reverse, MS docs say that lowest Z-order is closest to edge
for (int i = Widgets.Length - 1; i >= 0; i--) {
Widget child = Widgets[i];
Size child_size = child.Size;
if (child.AutoSize)
child_size = GetPreferredWidgetSize (child);
if (!child.VisibleInternal
|| child.WidgetLayoutType == Widget.LayoutType.Anchor)
continue;
// MdiClient never fills the whole area like other Widgets, have to do it later
if (child is MdiClient) {
mdi = (MdiClient)child;
continue;
}
switch (child.Dock) {
case DockStyle.None:
// Do nothing
break;
case DockStyle.Left:
child.SetBoundsInternal (space.Left, space.Y, child_size.Width, space.Height, BoundsSpecified.None);
space.X += child.Width;
space.Width -= child.Width;
break;
case DockStyle.Top:
child.SetBoundsInternal (space.Left, space.Y, space.Width, child_size.Height, BoundsSpecified.None);
space.Y += child.Height;
space.Height -= child.Height;
break;
case DockStyle.Right:
child.SetBoundsInternal (space.Right - child_size.Width, space.Y, child_size.Width, space.Height, BoundsSpecified.None);
space.Width -= child.Width;
break;
case DockStyle.Bottom:
child.SetBoundsInternal (space.Left, space.Bottom - child_size.Height, space.Width, child_size.Height, BoundsSpecified.None);
space.Height -= child.Height;
break;
case DockStyle.Fill:
child.SetBoundsInternal (space.Left, space.Top, space.Width, space.Height, BoundsSpecified.None);
break;
}
}
// MdiClient gets whatever space is left
if (mdi != null)
mdi.SetBoundsInternal (space.Left, space.Top, space.Width, space.Height, BoundsSpecified.None);
}
void LayoutAnchoredChildren (Widget parent, Widget[] Widgets)
{
Rectangle space = parent.ClientRectangle;
for (int i = 0; i < Widgets.Length; i++) {
int left;
int top;
int width;
int height;
Widget child = Widgets[i];
if (!child.VisibleInternal
|| child.WidgetLayoutType == Widget.LayoutType.Dock)
continue;
AnchorStyles anchor = child.Anchor;
left = child.Left;
top = child.Top;
width = child.Width;
height = child.Height;
if ((anchor & AnchorStyles.Right) != 0) {
if ((anchor & AnchorStyles.Left) != 0)
width = space.Width - child.dist_right - left;
else
left = space.Width - child.dist_right - width;
}
else if ((anchor & AnchorStyles.Left) == 0) {
// left+=diff_width/2 will introduce rounding errors (diff_width removed from svn after r51780)
// This calculates from scratch every time:
left = left + (space.Width - (left + width + child.dist_right)) / 2;
child.dist_right = space.Width - (left + width);
}
if ((anchor & AnchorStyles.Bottom) != 0) {
if ((anchor & AnchorStyles.Top) != 0)
height = space.Height - child.dist_bottom - top;
else
top = space.Height - child.dist_bottom - height;
}
else if ((anchor & AnchorStyles.Top) == 0) {
// top += diff_height/2 will introduce rounding errors (diff_height removed from after r51780)
// This calculates from scratch every time:
top = top + (space.Height - (top + height + child.dist_bottom)) / 2;
child.dist_bottom = space.Height - (top + height);
}
// Sanity
if (width < 0)
width = 0;
if (height < 0)
height = 0;
child.SetBoundsInternal (left, top, width, height, BoundsSpecified.None);
}
}
void LayoutAutoSizedChildren (Widget parent, Widget[] Widgets)
{
for (int i = 0; i < Widgets.Length; i++) {
int left;
int top;
Widget child = Widgets[i];
if (!child.VisibleInternal
|| child.WidgetLayoutType == Widget.LayoutType.Dock
|| !child.AutoSize)
continue;
AnchorStyles anchor = child.Anchor;
left = child.Left;
top = child.Top;
Size preferredsize = GetPreferredWidgetSize (child);
if (((anchor & AnchorStyles.Left) != 0) || ((anchor & AnchorStyles.Right) == 0))
child.dist_right += child.Width - preferredsize.Width;
if (((anchor & AnchorStyles.Top) != 0) || ((anchor & AnchorStyles.Bottom) == 0))
child.dist_bottom += child.Height - preferredsize.Height;
child.SetBoundsInternal (left, top, preferredsize.Width, preferredsize.Height, BoundsSpecified.None);
}
}
void LayoutAutoSizeContainer (Widget container)
{
int left;
int top;
int width;
int height;
if (!container.VisibleInternal || container.WidgetLayoutType == Widget.LayoutType.Dock || !container.AutoSize)
return;
left = container.Left;
top = container.Top;
Size preferredsize = container.PreferredSize;
if (container.GetAutoSizeMode () == AutoSizeMode.GrowAndShrink) {
width = preferredsize.Width;
height = preferredsize.Height;
} else {
width = container.ExplicitBounds.Width;
height = container.ExplicitBounds.Height;
if (preferredsize.Width > width)
width = preferredsize.Width;
if (preferredsize.Height > height)
height = preferredsize.Height;
}
// Sanity
if (width < container.MinimumSize.Width)
width = container.MinimumSize.Width;
if (height < container.MinimumSize.Height)
height = container.MinimumSize.Height;
if (container.MaximumSize.Width != 0 && width > container.MaximumSize.Width)
width = container.MaximumSize.Width;
if (container.MaximumSize.Height != 0 && height > container.MaximumSize.Height)
height = container.MaximumSize.Height;
container.SetBoundsInternal (left, top, width, height, BoundsSpecified.None);
}
public override bool Layout (object container, LayoutEventArgs args)
{
Widget parent = container as Widget;
Widget[] Widgets = parent.Widgets.GetAllWidgets ();
LayoutDockedChildren (parent, Widgets);
LayoutAnchoredChildren (parent, Widgets);
LayoutAutoSizedChildren (parent, Widgets);
if (parent is Form) LayoutAutoSizeContainer (parent);
return false;
}
private Size GetPreferredWidgetSize (Widget child)
{
int width;
int height;
Size preferredsize = child.PreferredSize;
if (child.GetAutoSizeMode () == AutoSizeMode.GrowAndShrink || (child.Dock != DockStyle.None && !(child is Button) && !(child is FlowLayoutPanel))) {
width = preferredsize.Width;
height = preferredsize.Height;
} else {
width = child.ExplicitBounds.Width;
height = child.ExplicitBounds.Height;
if (preferredsize.Width > width)
width = preferredsize.Width;
if (preferredsize.Height > height)
height = preferredsize.Height;
}
if (child.AutoSize && child is FlowLayoutPanel && child.Dock != DockStyle.None) {
switch (child.Dock) {
case DockStyle.Left:
case DockStyle.Right:
if (preferredsize.Width < child.ExplicitBounds.Width && preferredsize.Height < child.Parent.PaddingClientRectangle.Height)
width = preferredsize.Width;
break;
case DockStyle.Top:
case DockStyle.Bottom:
if (preferredsize.Height < child.ExplicitBounds.Height && preferredsize.Width < child.Parent.PaddingClientRectangle.Width)
height = preferredsize.Height;
break;
}
}
// Sanity
if (width < child.MinimumSize.Width)
width = child.MinimumSize.Width;
if (height < child.MinimumSize.Height)
height = child.MinimumSize.Height;
if (child.MaximumSize.Width != 0 && width > child.MaximumSize.Width)
width = child.MaximumSize.Width;
if (child.MaximumSize.Height != 0 && height > child.MaximumSize.Height)
height = child.MaximumSize.Height;
return new Size (width, height);
}
}
}
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