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using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.ComponentModel;
namespace Crow
{
public class GenericStack : Group
{
internal class Page
{
public byte[] bmp;
public int Size;
}
#region CTOR
public GenericStack()
: base()
{
}
#endregion
#region Private fields
int _spacing;
Orientation _orientation;
#endregion
public override T addChild<T> (T child)
{
T tmp = base.addChild (child);
this.RegisterForLayouting (LayoutingType.PositionChildren);
return tmp;
}
public override void removeChild (GraphicObject child)
{
base.removeChild (child);
this.RegisterForLayouting (LayoutingType.PositionChildren);
}
#region Public Properties
[XmlAttributeAttribute()][DefaultValue(2)]
public int Spacing
{
get { return _spacing; }
set {
if (_spacing == value)
return;
_spacing = value;
NotifyValueChanged ("Spacing", Spacing);
}
}
[XmlAttributeAttribute()][DefaultValue(Orientation.Horizontal)]
public virtual Orientation Orientation
{
get { return _orientation; }
set { _orientation = value; }
}
#endregion
#region GraphicObject Overrides
protected override Size measureRawSize ()
{
Size tmp = new Size ();
if (Orientation == Orientation.Horizontal) {
foreach (GraphicObject c in Children.Where(ch=>ch.Visible)) {
tmp.Width += c.Slot.Width + Spacing;
tmp.Height = Math.Max (tmp.Height, Math.Max(c.Slot.Bottom, c.Slot.Height));
}
if (tmp.Width > 0)
tmp.Width -= Spacing;
} else {
foreach (GraphicObject c in Children.Where(ch=>ch.Visible)) {
tmp.Width = Math.Max (tmp.Width, Math.Max(c.Slot.Right, c.Slot.Width));
tmp.Height += c.Slot.Height + Spacing;
}
if (tmp.Height > 0)
tmp.Height -= Spacing;
}
tmp.Width += 2 * Margin;
tmp.Height += 2 * Margin;
return tmp;
}
public virtual void ComputeChildrenPositions()
{
#if DEBUG_LAYOUTING
Debug.WriteLine("ComputeChildrenPosition: " + this.ToString());
#endif
int d = 0;
if (Orientation == Orientation.Horizontal) {
foreach (GraphicObject c in Children.Where(ch=>ch.Visible)) {
c.Slot.X = d;
d += c.Slot.Width + Spacing;
c.RegisterForLayouting (LayoutingType.Y);
}
} else {
foreach (GraphicObject c in Children.Where(ch=>ch.Visible)) {
c.Slot.Y = d;
d += c.Slot.Height + Spacing;
c.RegisterForLayouting (LayoutingType.X);
}
}
bmp = null;
}
public override void EnqueueForLayouting ()
{
if (Parent == null)
return;
base.EnqueueForLayouting ();
if (RegisteredLayoutings.HasFlag(LayoutingType.PositionChildren))
Interface.LayoutingQueue.Enqueue (LayoutingType.PositionChildren, this);
}
public override void UpdateLayout (LayoutingType layoutType)
{
if (layoutType == LayoutingType.PositionChildren) {
//allow 1 child to have size to 0 if stack has fixed or streched size,
//this child will occupy remaining space
if (Orientation == Orientation.Horizontal) {
if (Width >= 0) {
GraphicObject[] gobjs = Children.Where (c => c.Width == 0 && c.Visible).ToArray();
if (gobjs.Length > 1)
throw new Exception ("Only one child in stack may have size to stretched");
else if (gobjs.Length == 1) {
int sz = Children.Where(ch=>ch.Visible).Except (gobjs).Sum (g => g.Slot.Width);
if (sz < Slot.Width) {
gobjs [0].Slot.Width = Slot.Width - sz - (Children.Count-1) * Spacing - 2 * Margin;
int idx = Children.IndexOf (gobjs [0]);
if (idx > 0 && idx < Children.Count - 1)
gobjs [0].Slot.Width -= Spacing;
if (gobjs [0].LastSlots.Width != gobjs [0].Slot.Width) {
gobjs [0].bmp = null;
gobjs [0].OnLayoutChanges (LayoutingType.Width);
gobjs [0].LastSlots.Width = gobjs [0].Slot.Width;
}
}
}
}
} else {
if (Height >= 0) {
GraphicObject[] gobjs = Children.Where(ch=>ch.Visible).Where (c => c.Height == 0).ToArray();
if (gobjs.Length > 1)
throw new Exception ("Only one child in stack may have size to stretched");
else if (gobjs.Length == 1) {
int sz = Children.Where(ch=>ch.Visible).Except (gobjs).Sum (g => g.Slot.Height);
if (sz < Slot.Height) {
gobjs [0].Slot.Height = Slot.Height - sz- (Children.Count-1) * Spacing - 2 * Margin;
int idx = Children.IndexOf (gobjs [0]);
if (idx > 0 && idx < Children.Count - 1)
gobjs [0].Slot.Height -= Spacing;
if (gobjs [0].LastSlots.Height != gobjs [0].Slot.Height) {
gobjs [0].bmp = null;
gobjs [0].OnLayoutChanges (LayoutingType.Height);
gobjs [0].LastSlots.Height = gobjs [0].Slot.Height;
}
}
}
}
}
ComputeChildrenPositions ();
//if no layouting remains in queue for item, registre for redraw
if (RegisteredLQINodes.Count () <= 0 && bmp==null)
this.RegisterForRedraw ();
}else
base.UpdateLayout(layoutType);
}
public override void OnLayoutChanges (LayoutingType layoutType)
{
base.OnLayoutChanges (layoutType);
if (Orientation == Orientation.Horizontal){
if(layoutType == LayoutingType.Width)
this.RegisterForLayouting (LayoutingType.PositionChildren);
}else if (layoutType == LayoutingType.Height)
this.RegisterForLayouting (LayoutingType.PositionChildren);
}
public override void OnChildLayoutChanges (object sender, LayoutChangeEventArgs arg)
{
base.OnChildLayoutChanges (sender, arg);
GraphicObject g = sender as GraphicObject;
switch (arg.LayoutType) {
case LayoutingType.X:
break;
case LayoutingType.Y:
break;
case LayoutingType.Width:
if (Orientation == Orientation.Horizontal) {
if (this.Bounds.Width < 0)
this.RegisterForLayouting (LayoutingType.Width);
this.RegisterForLayouting (LayoutingType.PositionChildren);
}
break;
case LayoutingType.Height:
if (Orientation == Orientation.Vertical) {
if (this.Bounds.Height < 0)
this.RegisterForLayouting (LayoutingType.Height);
this.RegisterForLayouting (LayoutingType.PositionChildren);
}
break;
}
}
#endregion
}
}
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