-
Notifications
You must be signed in to change notification settings - Fork 47
/
TreeModelFilter.cpp
214 lines (177 loc) · 4.71 KB
/
TreeModelFilter.cpp
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
208
209
210
211
212
213
214
#include "TreeModelFilter.h"
#include <algorithm>
namespace wxutil
{
class TreeModelFilter::ChildModelNotifier :
public wxDataViewModelNotifier
{
private:
TreeModelFilter* _owner;
public:
ChildModelNotifier(TreeModelFilter* owner) :
_owner(owner)
{}
virtual bool ItemAdded(const wxDataViewItem& parent, const wxDataViewItem& item)
{
// Only pass the call if the item is relevant according to the filter criteria
if (_owner->ItemIsVisible(parent) && _owner->ItemIsVisible(item))
{
return _owner->ItemAdded(parent, item);
}
return true;
}
virtual bool ItemDeleted(const wxDataViewItem& parent, const wxDataViewItem& item)
{
return _owner->ItemDeleted(parent, item);
}
virtual bool ItemChanged(const wxDataViewItem& item)
{
if (_owner->ItemIsVisible(item))
{
return _owner->ItemChanged(item);
}
return true;
}
virtual bool ValueChanged(const wxDataViewItem& item, unsigned int col)
{
if (_owner->ItemIsVisible(item))
{
return _owner->ValueChanged(item, col);
}
return _owner->ValueChanged(item, col);
}
virtual bool Cleared()
{
return _owner->Cleared();
}
virtual void Resort()
{
_owner->Resort();
}
};
TreeModelFilter::TreeModelFilter(TreeModel::Ptr childModel, const Column* filterColumn) :
TreeModel(*childModel), // reference the existing model
_childModel(childModel),
_notifier(NULL),
_filterColumn(NULL)
{
_notifier = new ChildModelNotifier(this);
_childModel->AddNotifier(_notifier);
if (filterColumn != NULL)
{
SetFilterColumn(*filterColumn);
}
}
TreeModelFilter::~TreeModelFilter()
{
_childModel->RemoveNotifier(_notifier);
}
TreeModel::Ptr TreeModelFilter::GetChildModel()
{
return _childModel;
}
void TreeModelFilter::SetFilterColumn(const Column& column)
{
assert(column.type == Column::Boolean);
_filterColumn = &column;
}
void TreeModelFilter::SetVisibleFunc(const VisibleFunc& visibleFunc)
{
_customVisibleFunc = visibleFunc;
}
bool TreeModelFilter::ItemIsVisible(const wxDataViewItem& item) const
{
if (!item.IsOk()) return true;
Row row(item, *const_cast<TreeModelFilter*>(this));
return ItemIsVisible(row);
}
bool TreeModelFilter::ItemIsVisible(Row& row) const
{
// A custom filter logic always takes precedence over the filter column
if (_customVisibleFunc)
{
return _customVisibleFunc(row);
}
if (_filterColumn != NULL)
{
return row[*_filterColumn].getBool();
}
return true; // default fallback evaluates to true
}
void TreeModelFilter::ForeachNode(const VisitFunction& visitFunction)
{
_childModel->ForeachNode([&] (Row& row)
{
// Only visit unfiltered items
if (ItemIsVisible(row))
{
visitFunction(row);
}
});
}
wxDataViewItem TreeModelFilter::FindString(const std::string& needle, int column)
{
return FindRecursiveUsingRows(*getRootNode(), [&] (Row& row)->bool
{
if (!ItemIsVisible(row))
{
return false; // skip filtered items
}
return static_cast<std::string>(row[GetColumns()[column]]) == needle;
});
}
wxDataViewItem TreeModelFilter::FindInteger(long needle, int column)
{
return FindRecursiveUsingRows(*getRootNode(), [&] (Row& row)->bool
{
if (!ItemIsVisible(row))
{
return false; // skip filtered items
}
return row[GetColumns()[column]].getInteger() == needle;
});
}
bool TreeModelFilter::IsContainer(const wxDataViewItem& item) const
{
if (!item.IsOk())
{
return true;
}
#ifdef __WXGTK__
// greebo: The GTK DataViewCtrl implementation treats nodes differently
// based on whether they have children or not. If a tree model node has no children
// now it's not possible to add any children later on, causing assertions.
// wxGTK wants to know *in advance* whether a node has children, so let's assume true
// unless this is a listmodel (in which case non-root nodes never have children)
return !IsListModel() ? true : false;
#else
bool isContainer = _childModel->IsContainer(item);
if (!isContainer)
{
return false;
}
// Check if the node actually has visible children
wxDataViewItemArray children;
return GetChildren(item, children) > 0;
#endif
}
unsigned int TreeModelFilter::GetChildren(const wxDataViewItem& item, wxDataViewItemArray& children) const
{
if (_filterColumn == NULL && !_customVisibleFunc)
{
return _childModel->GetChildren(item, children);
}
// Get the raw child list
wxDataViewItemArray unfilteredChildren;
_childModel->GetChildren(item, unfilteredChildren);
// Only add the visible ones to the result set
std::for_each(unfilteredChildren.begin(), unfilteredChildren.end(), [&] (const wxDataViewItem& item)
{
if (ItemIsVisible(item))
{
children.Add(item);
}
});
return static_cast<int>(children.size());
}
} // namespace