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
|
// ************************************************************************************************
//
// qt-mvvm: Model-view-view-model framework for large GUI applications
//
//! @file mvvm/view/mvvm/widgets/propertyflatview.cpp
//! @brief Implements class CLASS?
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2020
//! @authors Gennady Pospelov et al, Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "mvvm/widgets/propertyflatview.h"
#include "mvvm/editors/customeditor.h"
#include "mvvm/editors/defaulteditorfactory.h"
#include "mvvm/factories/viewmodelfactory.h"
#include "mvvm/model/groupitem.h"
#include "mvvm/model/sessionitem.h"
#include "mvvm/viewmodel/standardviewitems.h"
#include "mvvm/viewmodel/viewmodel.h"
#include "mvvm/viewmodel/viewmodeldelegate.h"
#include "mvvm/widgets/layoututils.h"
#include <QDataWidgetMapper>
#include <QDebug>
#include <QGridLayout>
#include <QLabel>
using namespace ModelView;
struct PropertyFlatView::PropertyFlatViewImpl {
std::unique_ptr<ViewModel> view_model;
std::unique_ptr<ViewModelDelegate> m_delegate;
std::unique_ptr<DefaultEditorFactory> editor_factory;
std::vector<std::unique_ptr<QDataWidgetMapper>> widget_mappers;
std::map<ViewItem*, QWidget*> item_to_widget;
QGridLayout* grid_layout{nullptr};
PropertyFlatViewImpl()
: m_delegate(std::make_unique<ViewModelDelegate>())
, editor_factory(std::make_unique<DefaultEditorFactory>())
, grid_layout(new QGridLayout)
{
}
//! Creates label for given index.
std::unique_ptr<QLabel> create_label(ViewItem* view_item)
{
auto result = std::make_unique<QLabel>(view_item->data(Qt::DisplayRole).toString());
result->setSizePolicy(QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed));
result->setEnabled(view_item->item()->isEnabled());
return result;
}
//! Creates custom editor for given index.
std::unique_ptr<CustomEditor> create_editor(const QModelIndex& index)
{
auto editor = editor_factory->createEditor(index);
m_delegate->setEditorData(editor.get(), index);
connect(editor.get(), &CustomEditor::dataChanged, m_delegate.get(),
&ViewModelDelegate::onCustomEditorDataChanged);
editor->setEnabled(view_model->sessionItemFromIndex(index)->isEnabled());
return editor;
}
//! Connect model.
void connect_model()
{
auto on_data_change = [this](const QModelIndex& topLeft, const QModelIndex&,
const QVector<int>& roles) {
#if QT_VERSION >= QT_VERSION_CHECK(5, 13, 0)
QVector<int> expected_roles = {Qt::ForegroundRole};
#else
QVector<int> expected_roles = {Qt::TextColorRole};
#endif
if (roles == expected_roles) {
auto view_item = view_model->viewItemFromIndex(topLeft);
auto it = item_to_widget.find(view_item);
if (it != item_to_widget.end())
it->second->setEnabled(view_item->item()->isEnabled());
}
};
connect(view_model.get(), &ViewModel::dataChanged, on_data_change);
auto on_row_inserted = [this](const QModelIndex&, int, int) { update_grid_layout(); };
connect(view_model.get(), &ViewModel::rowsInserted, on_row_inserted);
auto on_row_removed = [this](const QModelIndex&, int, int) { update_grid_layout(); };
connect(view_model.get(), &ViewModel::rowsRemoved, on_row_removed);
}
//! Creates widget for given index to appear in grid layout.
std::unique_ptr<QWidget> create_widget(const QModelIndex& index)
{
auto view_item = view_model->viewItemFromIndex(index);
if (auto label_item = dynamic_cast<ViewLabelItem*>(view_item); label_item)
return create_label(label_item);
return create_editor(index);
}
//! Creates row of widget mappers. Each widget mapper will serve all editors in a column.
void update_mappers()
{
widget_mappers.clear();
for (int row = 0; row < view_model->rowCount(); ++row) {
auto mapper = std::make_unique<QDataWidgetMapper>();
mapper->setModel(view_model.get());
mapper->setItemDelegate(m_delegate.get());
mapper->setRootIndex(QModelIndex());
mapper->setCurrentModelIndex(view_model->index(row, 0));
widget_mappers.emplace_back(std::move(mapper));
}
}
//! Updates grid layout with all editors corresponding to the model.
void update_grid_layout()
{
LayoutUtils::clearGridLayout(grid_layout, true);
update_mappers();
item_to_widget.clear();
for (int row = 0; row < view_model->rowCount(); ++row) {
for (int col = 0; col < view_model->columnCount(); ++col) {
auto index = view_model->index(row, col);
auto widget = create_widget(index);
item_to_widget[view_model->viewItemFromIndex(index)] = widget.get();
widget_mappers[static_cast<size_t>(row)]->addMapping(widget.get(), col);
grid_layout->addWidget(widget.release(), row, col);
}
}
}
};
PropertyFlatView::PropertyFlatView(QWidget* parent)
: QWidget(parent), p_impl(std::make_unique<PropertyFlatViewImpl>())
{
auto main_layout = new QVBoxLayout;
main_layout->setMargin(0);
main_layout->setSpacing(0);
p_impl->grid_layout->setSpacing(6);
main_layout->addLayout(p_impl->grid_layout);
main_layout->addStretch(1);
setLayout(main_layout);
}
PropertyFlatView::~PropertyFlatView() = default;
void PropertyFlatView::setItem(SessionItem* item)
{
p_impl->view_model = Factory::CreatePropertyFlatViewModel(item->model());
p_impl->view_model->setRootSessionItem(item);
p_impl->connect_model();
p_impl->update_grid_layout();
}
|
