Libkdepim

kwidgetlister.cpp
1/* -*- c++ -*-
2
3 kwidgetlister.cpp
4
5 This file is part of libkdepim.
6 SPDX-FileCopyrightText: 2001 Marc Mutz <mutz@kde.org>
7
8 SPDX-License-Identifier: GPL-2.0-or-later
9*/
10
11#include "kwidgetlister.h"
12
13#include <KGuiItem>
14#include <KLocalizedString>
15#include <QHBoxLayout>
16
17#include <QPushButton>
18#include <QVBoxLayout>
19
20#include <KStandardGuiItem>
21#include <cassert>
22
23using namespace KPIM;
24
25class Q_DECL_HIDDEN KWidgetLister::KWidgetListerPrivate
26{
27public:
28 KWidgetListerPrivate(KWidgetLister *qq)
29 : q(qq)
30 {
31 }
32
33 ~KWidgetListerPrivate()
34 {
35 qDeleteAll(mWidgetList);
36 mWidgetList.clear();
37 }
38
39 void enableControls();
40
41 KWidgetLister *const q;
42 QPushButton *mBtnMore = nullptr;
43 QPushButton *mBtnFewer = nullptr;
44 QPushButton *mBtnClear = nullptr;
45 QVBoxLayout *mLayout = nullptr;
46 QWidget *mButtonBox = nullptr;
47 QList<QWidget *> mWidgetList;
48 int mMinWidgets = 0;
49 int mMaxWidgets = 0;
50};
51
52void KWidgetLister::KWidgetListerPrivate::enableControls()
53{
54 const int count = mWidgetList.count();
55 const bool isMaxWidgets = (count >= mMaxWidgets);
56 const bool isMinWidgets = (count <= mMinWidgets);
57 if (mBtnMore) {
58 mBtnMore->setEnabled(!isMaxWidgets);
59 }
60 if (mBtnFewer) {
61 mBtnFewer->setEnabled(!isMinWidgets);
62 }
63}
64
65KWidgetLister::KWidgetLister(bool fewerMoreButton, int minWidgets, int maxWidgets, QWidget *parent)
67 , d(new KWidgetListerPrivate(this))
68{
69 d->mMinWidgets = qMax(minWidgets, 1);
70 d->mMaxWidgets = qMax(maxWidgets, d->mMinWidgets + 1);
71 init(fewerMoreButton);
72}
73
75
76void KWidgetLister::init(bool fewerMoreButton)
77{
78 //--------- the button box
79 d->mLayout = new QVBoxLayout(this);
80 d->mLayout->setContentsMargins({});
81 d->mLayout->setSpacing(4);
82 d->mLayout->setAlignment(Qt::AlignTop);
83
84 d->mButtonBox = new QWidget(this);
85 auto mButtonBoxHBoxLayout = new QHBoxLayout(d->mButtonBox);
86 mButtonBoxHBoxLayout->setContentsMargins({});
87 d->mLayout->addWidget(d->mButtonBox);
88
89 if (fewerMoreButton) {
90 d->mBtnMore = new QPushButton(d->mButtonBox);
91 mButtonBoxHBoxLayout->addWidget(d->mBtnMore);
92 KGuiItem::assign(d->mBtnMore, KGuiItem(i18nc("more widgets", "More"), QStringLiteral("list-add")));
93 mButtonBoxHBoxLayout->setStretchFactor(d->mBtnMore, 0);
94
95 d->mBtnFewer = new QPushButton(d->mButtonBox);
96 mButtonBoxHBoxLayout->addWidget(d->mBtnFewer);
97 KGuiItem::assign(d->mBtnFewer, KGuiItem(i18nc("fewer widgets", "Fewer"), QStringLiteral("list-remove")));
98 mButtonBoxHBoxLayout->setStretchFactor(d->mBtnFewer, 0);
99 }
100 auto spacer = new QWidget(d->mButtonBox);
101 mButtonBoxHBoxLayout->addWidget(spacer);
102 mButtonBoxHBoxLayout->setStretchFactor(spacer, 1);
103
104 d->mBtnClear = new QPushButton(d->mButtonBox);
105 mButtonBoxHBoxLayout->addWidget(d->mBtnClear);
107 // FIXME a useful what's this. KStandardGuiItem::clear() returns a text with an edit box
108 d->mBtnClear->setWhatsThis(QString());
109 mButtonBoxHBoxLayout->setStretchFactor(d->mBtnClear, 0);
110
111 //---------- connect everything
112 if (fewerMoreButton) {
115 }
116
118
119 d->enableControls();
120}
121
123{
124 // the class should make certain that slotMore can't
125 // be called when mMaxWidgets are on screen.
126 assert(d->mWidgetList.count() < d->mMaxWidgets);
127
129 // adjustSize();
130 d->enableControls();
131}
132
134{
135 // the class should make certain that slotFewer can't
136 // be called when mMinWidgets are on screen.
137 assert(d->mWidgetList.count() > d->mMinWidgets);
138
140 // adjustSize();
141 d->enableControls();
142}
143
145{
146 setNumberOfShownWidgetsTo(d->mMinWidgets);
147
148 // clear remaining widgets
149 for (QWidget *widget : std::as_const(d->mWidgetList)) {
150 clearWidget(widget);
151 }
152
153 // adjustSize();
154 d->enableControls();
156}
157
159{
160 if (!widget) {
161 widget = this->createWidget(this);
162 }
163
164 d->mLayout->insertWidget(d->mLayout->indexOf(d->mButtonBox), widget);
165 d->mWidgetList.append(widget);
166 widget->show();
167
168 d->enableControls();
170 Q_EMIT widgetAdded(widget);
171}
172
174{
175 // The layout will take care that the
176 // widget is removed from screen, too.
177 delete d->mWidgetList.takeLast();
178 d->enableControls();
180}
181
183{
184 Q_UNUSED(widget)
185}
186
188{
189 return new QWidget(parent);
190}
191
193{
194 int superfluousWidgets = qMax(d->mWidgetList.count() - aNum, 0);
195 int missingWidgets = qMax(aNum - d->mWidgetList.count(), 0);
196
197 // remove superfluous widgets
198 for (; superfluousWidgets; superfluousWidgets--) {
200 }
201
202 // add missing widgets
203 for (; missingWidgets; missingWidgets--) {
205 }
206}
207
209{
210 return d->mWidgetList;
211}
212
214{
215 return d->mMinWidgets;
216}
217
219{
220 return d->mMaxWidgets;
221}
222
224{
225 // The layout will take care that the
226 // widget is removed from screen, too.
227
228 if (d->mWidgetList.count() <= widgetsMinimum()) {
229 return;
230 }
231
232 const int index = d->mWidgetList.indexOf(widget);
233 QWidget *w = d->mWidgetList.takeAt(index);
234 w->deleteLater();
235 w = nullptr;
236 d->enableControls();
237 Q_EMIT widgetRemoved(widget);
239}
240
242{
243 if (!widget) {
244 widget = this->createWidget(this);
245 }
246
247 int index = d->mLayout->indexOf(currentWidget ? currentWidget : d->mButtonBox) + 1;
248 d->mLayout->insertWidget(index, widget);
249 if (currentWidget) {
250 index = d->mWidgetList.indexOf(currentWidget);
251 d->mWidgetList.insert(index + 1, widget);
252 } else {
253 d->mWidgetList.append(widget);
254 }
255 widget->show();
256
257 d->enableControls();
259 Q_EMIT widgetAdded(widget);
260}
261
262#include "moc_kwidgetlister.cpp"
static void assign(QPushButton *button, const KGuiItem &item)
Widget that manages a list of other widgets (incl.
virtual void slotMore()
Called whenever the user clicks on the 'more' button.
virtual void clearWidget(QWidget *w)
Called to clear a given widget.
void widgetAdded()
This signal is emitted whenever a widget was added.
virtual void removeLastWidget()
Removes a single (always the last) widget.
void widgetRemoved()
This signal is emitted whenever a widget was removed.
virtual void addWidgetAfterThisWidget(QWidget *currentWidget, QWidget *widget=nullptr)
Add widget after specific widget.
virtual void slotClear()
Called whenever the user clicks on the 'clear' button.
~KWidgetLister() override
Destroys the widget lister.
virtual void removeWidget(QWidget *widget)
Remove specific widget.
int widgetsMaximum() const
The maximum number of widgets that are to be shown on screen.
virtual QWidget * createWidget(QWidget *parent)
Returns a new widget that shall be added to the lister.
virtual void addWidgetAtEnd(QWidget *widget=nullptr)
Adds a single widget.
virtual void setNumberOfShownWidgetsTo(int count)
Sets the number of widgets on screen to exactly count.
QList< QWidget * > widgets() const
Returns the list of widgets.
KWidgetLister(bool fewerMoreButton, int minWidgets=1, int maxWidgets=8, QWidget *parent=nullptr)
Creates a new widget lister.
int widgetsMinimum() const
The minimum number of widgets that are to stay on screen.
virtual void slotFewer()
Called whenever the user clicks on the 'fewer' button.
void clearWidgets()
This signal is emitted whenever the clear button is clicked.
QString i18nc(const char *context, const char *text, const TYPE &arg...)
Class KCheckComboBox::KCheckComboBoxPrivate.
KGuiItem clear()
void clicked(bool checked)
qsizetype count() const const
Q_EMITQ_EMIT
QMetaObject::Connection connect(const QObject *sender, PointerToMemberFunction signal, Functor functor)
void deleteLater()
QObject * parent() const const
AlignTop
QWidget(QWidget *parent, Qt::WindowFlags f)
void setEnabled(bool)
void show()
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