1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
using UnityEngine;
using System.Collections.Generic;
namespace UnityEngine.UI
{
[AddComponentMenu("Layout/Grid Layout Group", 152)]
public class GridLayoutGroup : LayoutGroup
{
public enum Corner { UpperLeft = 0, UpperRight = 1, LowerLeft = 2, LowerRight = 3 }
public enum Axis { Horizontal = 0, Vertical = 1 }
public enum Constraint { Flexible = 0, FixedColumnCount = 1, FixedRowCount = 2 }
[SerializeField] protected Corner m_StartCorner = Corner.UpperLeft;
public Corner startCorner { get { return m_StartCorner; } set { SetProperty(ref m_StartCorner, value); } }
[SerializeField] protected Axis m_StartAxis = Axis.Horizontal;
public Axis startAxis { get { return m_StartAxis; } set { SetProperty(ref m_StartAxis, value); } }
[SerializeField] protected Vector2 m_CellSize = new Vector2(100, 100);
public Vector2 cellSize { get { return m_CellSize; } set { SetProperty(ref m_CellSize, value); } }
[SerializeField] protected Vector2 m_Spacing = Vector2.zero;
public Vector2 spacing { get { return m_Spacing; } set { SetProperty(ref m_Spacing, value); } }
[SerializeField] protected Constraint m_Constraint = Constraint.Flexible;
public Constraint constraint { get { return m_Constraint; } set { SetProperty(ref m_Constraint, value); } }
[SerializeField] protected int m_ConstraintCount = 2;
public int constraintCount { get { return m_ConstraintCount; } set { SetProperty(ref m_ConstraintCount, Mathf.Max(1, value)); } }
protected GridLayoutGroup()
{}
#if UNITY_EDITOR
protected override void OnValidate()
{
base.OnValidate();
constraintCount = constraintCount;
}
#endif
public override void CalculateLayoutInputHorizontal()
{
base.CalculateLayoutInputHorizontal();
int minColumns = 0;
int preferredColumns = 0;
if (m_Constraint == Constraint.FixedColumnCount)
{
minColumns = preferredColumns = m_ConstraintCount;
}
else if (m_Constraint == Constraint.FixedRowCount)
{
minColumns = preferredColumns = Mathf.CeilToInt(rectChildren.Count / (float)m_ConstraintCount - 0.001f);
}
else
{
minColumns = 1;
preferredColumns = Mathf.CeilToInt(Mathf.Sqrt(rectChildren.Count));
}
SetLayoutInputForAxis(
padding.horizontal + (cellSize.x + spacing.x) * minColumns - spacing.x,
padding.horizontal + (cellSize.x + spacing.x) * preferredColumns - spacing.x,
-1, 0);
}
public override void CalculateLayoutInputVertical()
{
int minRows = 0;
if (m_Constraint == Constraint.FixedColumnCount)
{
minRows = Mathf.CeilToInt(rectChildren.Count / (float)m_ConstraintCount - 0.001f);
}
else if (m_Constraint == Constraint.FixedRowCount)
{
minRows = m_ConstraintCount;
}
else
{
float width = rectTransform.rect.size.x;
int cellCountX = Mathf.Max(1, Mathf.FloorToInt((width - padding.horizontal + spacing.x + 0.001f) / (cellSize.x + spacing.x)));
minRows = Mathf.CeilToInt(rectChildren.Count / (float)cellCountX);
}
float minSpace = padding.vertical + (cellSize.y + spacing.y) * minRows - spacing.y;
SetLayoutInputForAxis(minSpace, minSpace, -1, 1);
}
public override void SetLayoutHorizontal()
{
SetCellsAlongAxis(0);
}
public override void SetLayoutVertical()
{
SetCellsAlongAxis(1);
}
private void SetCellsAlongAxis(int axis)
{
// Normally a Layout Controller should only set horizontal values when invoked for the horizontal axis
// and only vertical values when invoked for the vertical axis.
// However, in this case we set both the horizontal and vertical position when invoked for the vertical axis.
// Since we only set the horizontal position and not the size, it shouldn't affect children's layout,
// and thus shouldn't break the rule that all horizontal layout must be calculated before all vertical layout.
if (axis == 0)
{
// Only set the sizes when invoked for horizontal axis, not the positions.
for (int i = 0; i < rectChildren.Count; i++)
{
RectTransform rect = rectChildren[i];
m_Tracker.Add(this, rect,
DrivenTransformProperties.Anchors |
DrivenTransformProperties.AnchoredPosition |
DrivenTransformProperties.SizeDelta);
rect.anchorMin = Vector2.up;
rect.anchorMax = Vector2.up;
rect.sizeDelta = cellSize;
}
return;
}
float width = rectTransform.rect.size.x;
float height = rectTransform.rect.size.y;
int cellCountX = 1;
int cellCountY = 1;
if (m_Constraint == Constraint.FixedColumnCount)
{
cellCountX = m_ConstraintCount;
cellCountY = Mathf.CeilToInt(rectChildren.Count / (float)cellCountX - 0.001f);
}
else if (m_Constraint == Constraint.FixedRowCount)
{
cellCountY = m_ConstraintCount;
cellCountX = Mathf.CeilToInt(rectChildren.Count / (float)cellCountY - 0.001f);
}
else
{
if (cellSize.x + spacing.x <= 0)
cellCountX = int.MaxValue;
else
cellCountX = Mathf.Max(1, Mathf.FloorToInt((width - padding.horizontal + spacing.x + 0.001f) / (cellSize.x + spacing.x)));
if (cellSize.y + spacing.y <= 0)
cellCountY = int.MaxValue;
else
cellCountY = Mathf.Max(1, Mathf.FloorToInt((height - padding.vertical + spacing.y + 0.001f) / (cellSize.y + spacing.y)));
}
int cornerX = (int)startCorner % 2;
int cornerY = (int)startCorner / 2;
int cellsPerMainAxis, actualCellCountX, actualCellCountY;
if (startAxis == Axis.Horizontal)
{
cellsPerMainAxis = cellCountX;
actualCellCountX = Mathf.Clamp(cellCountX, 1, rectChildren.Count);
actualCellCountY = Mathf.Clamp(cellCountY, 1, Mathf.CeilToInt(rectChildren.Count / (float)cellsPerMainAxis));
}
else
{
cellsPerMainAxis = cellCountY;
actualCellCountY = Mathf.Clamp(cellCountY, 1, rectChildren.Count);
actualCellCountX = Mathf.Clamp(cellCountX, 1, Mathf.CeilToInt(rectChildren.Count / (float)cellsPerMainAxis));
}
Vector2 requiredSpace = new Vector2(
actualCellCountX * cellSize.x + (actualCellCountX - 1) * spacing.x,
actualCellCountY * cellSize.y + (actualCellCountY - 1) * spacing.y
);
Vector2 startOffset = new Vector2(
GetStartOffset(0, requiredSpace.x),
GetStartOffset(1, requiredSpace.y)
);
for (int i = 0; i < rectChildren.Count; i++)
{
int positionX;
int positionY;
if (startAxis == Axis.Horizontal)
{
positionX = i % cellsPerMainAxis;
positionY = i / cellsPerMainAxis;
}
else
{
positionX = i / cellsPerMainAxis;
positionY = i % cellsPerMainAxis;
}
if (cornerX == 1)
positionX = actualCellCountX - 1 - positionX;
if (cornerY == 1)
positionY = actualCellCountY - 1 - positionY;
SetChildAlongAxis(rectChildren[i], 0, startOffset.x + (cellSize[0] + spacing[0]) * positionX, cellSize[0]);
SetChildAlongAxis(rectChildren[i], 1, startOffset.y + (cellSize[1] + spacing[1]) * positionY, cellSize[1]);
}
}
}
}
|
