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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
{
#region CTOR
public GenericStack()
: base()
{
}
#endregion
#region Private fields
int _spacing;
Orientation _orientation;
#endregion
#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
public override bool ArrangeChildren { get { return true; } }
public override void ChildrenLayoutingConstraints (ref LayoutingType layoutType)
{
//Prevent child repositionning in the direction of stacking
if (Orientation == Orientation.Horizontal)
layoutType &= (~LayoutingType.X);
else
layoutType &= (~LayoutingType.Y);
}
protected override int measureRawSize (LayoutingType lt)
{
int tmp = 0;
switch (lt) {
case LayoutingType.Width:
if (Orientation == Orientation.Horizontal) {
if (Children.Count > 0) {
foreach (GraphicObject c in Children) {
if (!c.Visible)
continue;
if (c.RegisteredLayoutings.HasFlag (LayoutingType.Width))
return -1;
tmp += c.Slot.Width + Spacing;
}
tmp -= Spacing;
}
break;
}
return base.measureRawSize (lt);
case LayoutingType.Height:
if (Orientation == Orientation.Vertical) {
if (Children.Count > 0) {
foreach (GraphicObject c in Children) {
if (!c.Visible)
continue;
if (c.RegisteredLayoutings.HasFlag (LayoutingType.Height))
return -1;
tmp += c.Slot.Height + Spacing;
}
tmp -= Spacing;
}
break;
}
return base.measureRawSize (lt);
}
return tmp + 2 * Margin;
}
public virtual void ComputeChildrenPositions()
{
int d = 0;
if (Orientation == Orientation.Horizontal) {
foreach (GraphicObject c in Children) {
if (!c.Visible)
continue;
c.Slot.X = d;
d += c.Slot.Width + Spacing;
c.RegisterForLayouting (LayoutingType.Y);
}
} else {
foreach (GraphicObject c in Children) {
if (!c.Visible)
continue;
c.Slot.Y = d;
d += c.Slot.Height + Spacing;
c.RegisterForLayouting (LayoutingType.X);
}
}
bmp = null;
}
public override bool UpdateLayout (LayoutingType layoutType)
{
RegisteredLayoutings &= (~layoutType);
if (layoutType == LayoutingType.ArrangeChildren) {
//allow 1 child to have size to 0 if stack has fixed or streched size policy,
//this child will occupy remaining space
//if stack size policy is Fit, no child may have stretch enabled
//in the direction of stacking.
if (Orientation == Orientation.Horizontal) {
GraphicObject stretchedGO = null;
int tmpWidth = Slot.Width;
int cptChildren = 0;
for (int i = 0; i < Children.Count; i++) {
if (!Children [i].Visible)
continue;
//requeue Positionning if child is not layouted
if (Children [i].RegisteredLayoutings.HasFlag (LayoutingType.Width))
return false;
cptChildren++;
if (Children [i].Width == 0) {
if (!(stretchedGO == null && Width >= 0)) {
//change size policy of other stretched children
Children [i].Width = -1;
return false;
}
stretchedGO = Children [i];
if (i < Children.Count - 1)
tmpWidth -= Spacing;
continue;
}
tmpWidth -= Children [i].Slot.Width + Spacing;
}
if (stretchedGO != null && Width >= 0) {
tmpWidth += (Spacing - 2 * Margin);
if (tmpWidth < MinimumSize.Width)
tmpWidth = MinimumSize.Width;
else if (tmpWidth > MaximumSize.Width && MaximumSize.Width > 0)
tmpWidth = MaximumSize.Width;
if (stretchedGO.LastSlots.Width != tmpWidth) {
stretchedGO.Slot.Width = tmpWidth;
stretchedGO.bmp = null;
#if DEBUG_LAYOUTING
Debug.WriteLine ("\tAdjusting Width of " + stretchedGO.ToString());
#endif
stretchedGO.OnLayoutChanges (LayoutingType.Width);
stretchedGO.LastSlots.Width = stretchedGO.Slot.Width;
}
}
} else {
GraphicObject stretchedGO = null;
int tmpHeight = Slot.Height;
int cptChildren = 0;
for (int i = 0; i < Children.Count; i++) {
if (!Children [i].Visible)
continue;
if (Children [i].RegisteredLayoutings.HasFlag (LayoutingType.Height))
return false;
cptChildren++;
if (Children [i].Height == 0) {
if (!(stretchedGO == null && Height >= 0)){
Children [i].Height = -1;
return false;
}
stretchedGO = Children [i];
if (i < Children.Count - 1)
tmpHeight -= Spacing;
continue;
}
tmpHeight -= Children[i].Slot.Height + Spacing;
}
if (stretchedGO != null && Height >= 0) {
tmpHeight += (Spacing - 2 * Margin);
if (tmpHeight < MinimumSize.Height)
tmpHeight = MinimumSize.Height;
else if (tmpHeight > MaximumSize.Height && MaximumSize.Height > 0)
tmpHeight = MaximumSize.Height;
if (stretchedGO.LastSlots.Height != tmpHeight) {
stretchedGO.Slot.Height = tmpHeight;
stretchedGO.bmp = null;
#if DEBUG_LAYOUTING
Debug.WriteLine ("\tAdjusting Height of " + stretchedGO.ToString());
#endif
stretchedGO.OnLayoutChanges (LayoutingType.Height);
stretchedGO.LastSlots.Height = stretchedGO.Slot.Height;
}
}
}
ComputeChildrenPositions ();
//if no layouting remains in queue for item, registre for redraw
if (RegisteredLayoutings == LayoutingType.None && bmp==null)
this.AddToRedrawList ();
return true;
}
return base.UpdateLayout(layoutType);
}
public override void OnChildLayoutChanges (object sender, LayoutingEventArgs arg)
{
base.OnChildLayoutChanges (sender, arg);
switch (arg.LayoutType) {
case LayoutingType.Width:
if (Orientation == Orientation.Horizontal) {
if (Width < 0)
this.RegisterForLayouting (LayoutingType.Width);
this.RegisterForLayouting (LayoutingType.ArrangeChildren);
}
break;
case LayoutingType.Height:
if (Orientation == Orientation.Vertical) {
if (Height < 0)
this.RegisterForLayouting (LayoutingType.Height);
this.RegisterForLayouting (LayoutingType.ArrangeChildren);
}
break;
}
}
#endregion
}
}
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