BiblioteQ
biblioteq_woody.h
1 /*
2 ** Copyright (c) Alexis Megas.
3 ** All rights reserved.
4 **
5 ** Redistribution and use in source and binary forms, with or without
6 ** modification, are permitted provided that the following conditions
7 ** are met:
8 ** 1. Redistributions of source code must retain the above copyright
9 ** notice, this list of conditions and the following disclaimer.
10 ** 2. Redistributions in binary form must reproduce the above copyright
11 ** notice, this list of conditions and the following disclaimer in the
12 ** documentation and/or other materials provided with the distribution.
13 ** 3. The name of the author may not be used to endorse or promote products
14 ** derived from Woody without specific prior written permission.
15 **
16 ** WOODY IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 ** WOODY, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27 
28 #ifndef _woody_collapse_expand_tool_button_h_
29 #define _woody_collapse_expand_tool_button_h_
30 
31 #include <QHeaderView>
32 #include <QPointer>
33 #include <QScrollBar>
34 #include <QToolButton>
35 #include <QTreeWidget>
36 
37 class woody_collapse_expand_tool_button: public QToolButton
38 {
39  Q_OBJECT
40 
41  public:
42  woody_collapse_expand_tool_button(QTreeWidget *tree):QToolButton(tree)
43  {
44  m_tree = tree;
45 
46  if(m_tree && m_tree->header())
47  {
48  m_tree->header()->setDefaultAlignment(Qt::AlignCenter);
49  m_tree->header()->setMinimumHeight(30);
50  move(5, (m_tree->header()->size().height() - 25) / 2 + 2);
51  resize(25, 25);
52  setCheckable(true);
53 
54  auto font(this->font());
55 
56  font.setStyleHint(QFont::Courier);
57  setFont(font);
58  setStyleSheet("QToolButton {border: none;}"
59  "QToolButton::menu-button {border: none;}");
60  setText(tr("+"));
61  setToolTip(tr("Collapse / Expand"));
62  connect(m_tree,
63  SIGNAL(itemCollapsed(QTreeWidgetItem *)),
64  this,
65  SLOT(slot_item_collapsed_expanded(void)));
66  connect(m_tree,
67  SIGNAL(itemExpanded(QTreeWidgetItem *)),
68  this,
69  SLOT(slot_item_collapsed_expanded(void)));
70  connect(m_tree->horizontalScrollBar(),
71  SIGNAL(valueChanged(int)),
72  this,
73  SLOT(slot_scroll(int)));
74  connect(this,
75  SIGNAL(clicked(void)),
76  this,
77  SLOT(slot_collapse(void)));
78  }
79  else
80  setVisible(false);
81  }
82 
83  private:
84  QPointer<QTreeWidget> m_tree;
85 
86  private slots:
87  void slot_collapse(void)
88  {
89  if(m_tree)
90  {
91  disconnect(m_tree,
92  SIGNAL(itemCollapsed(QTreeWidgetItem *)),
93  this,
94  SLOT(slot_item_collapsed_expanded(void)));
95  disconnect(m_tree,
96  SIGNAL(itemExpanded(QTreeWidgetItem *)),
97  this,
98  SLOT(slot_item_collapsed_expanded(void)));
99  }
100 
101  if(isChecked())
102  {
103  if(m_tree)
104  m_tree->expandAll();
105 
106  setText(tr("-"));
107  }
108  else
109  {
110  if(m_tree)
111  m_tree->collapseAll();
112 
113  setText(tr("+"));
114  }
115 
116  if(m_tree)
117  {
118  connect(m_tree,
119  SIGNAL(itemCollapsed(QTreeWidgetItem *)),
120  this,
121  SLOT(slot_item_collapsed_expanded(void)));
122  connect(m_tree,
123  SIGNAL(itemExpanded(QTreeWidgetItem *)),
124  this,
125  SLOT(slot_item_collapsed_expanded(void)));
126  }
127  }
128 
129  void slot_item_collapsed_expanded(void)
130  {
131  if(!m_tree)
132  return;
133 
134  int expanded = 0;
135 
136  for(int i = 0; i < m_tree->topLevelItemCount(); i++)
137  if(m_tree->topLevelItem(i) && m_tree->topLevelItem(i)->childCount() > 0)
138  expanded += m_tree->topLevelItem(i)->isExpanded() ? 1 : 0;
139 
140  if(expanded == 0)
141  {
142  setChecked(false);
143  setText(tr("+"));
144  }
145  else
146  {
147  setChecked(true);
148  setText(tr("-"));
149  }
150  }
151 
152  void slot_scroll(int value)
153  {
154  setVisible(geometry().right() - geometry().width() / 2 > value);
155  }
156 };
157 
158 #endif
Definition: biblioteq_woody.h:38