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Make widget scalable and set minimum width based on the widget text

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This commit is contained in:
Janek Bevendorff
2017-02-22 03:39:13 +01:00
parent cee297b218
commit 74afd8e819
5 changed files with 89 additions and 19 deletions
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66
src/gui/CategoryListWidget.cpp
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@@ -26,10 +26,12 @@
CategoryListWidget::CategoryListWidget(QWidget* parent)
: QWidget(parent),
m_itemDelegate(nullptr),
m_ui(new Ui::CategoryListWidget())
{
m_ui->setupUi(this);
m_ui->categoryList->setItemDelegate(new CategoryListWidgetDelegate(this));
m_itemDelegate = new CategoryListWidgetDelegate(m_ui->categoryList);
m_ui->categoryList->setItemDelegate(m_itemDelegate);
connect(m_ui->categoryList, SIGNAL(currentRowChanged(int)), SLOT(emitCategoryChanged(int)));
@@ -47,10 +49,16 @@ QSize CategoryListWidget::sizeHint() const
{
QSize sizeHint = QWidget::sizeHint();
int width = m_ui->categoryList->sizeHintForColumn(0) + m_ui->categoryList->frameWidth() * 2;
int width = m_ui->categoryList->sizeHintForColumn(0);
if (m_ui->categoryList->verticalScrollBar()->isVisible()) {
width += m_ui->categoryList->verticalScrollBar()->width();
}
QSize min = minimumSizeHint();
if (width < min.width()) {
width = min.width();
}
width += m_ui->categoryList->frameWidth() * 2;
sizeHint.setWidth(width);
return sizeHint;
@@ -58,7 +66,8 @@ QSize CategoryListWidget::sizeHint() const
QSize CategoryListWidget::minimumSizeHint() const
{
return QSize(sizeHint().width(), m_ui->categoryList->sizeHintForRow(0) * 2);
return QSize(m_ui->categoryList->sizeHintForColumn(0) + m_ui->categoryList->frameWidth() * 2,
m_ui->categoryList->sizeHintForRow(0) * 2);
}
int CategoryListWidget::addCategory(const QString& labelText, const QIcon& icon)
@@ -101,6 +110,16 @@ void CategoryListWidget::showEvent(QShowEvent* event)
updateCategoryScrollButtons();
}
void CategoryListWidget::resizeEvent(QResizeEvent* event)
{
auto newDelegate = new CategoryListWidgetDelegate(m_ui->categoryList);
m_ui->categoryList->setItemDelegate(newDelegate);
m_itemDelegate->deleteLater();
m_itemDelegate = newDelegate;
QWidget::resizeEvent(event);
}
void CategoryListWidget::updateCategoryScrollButtons()
{
m_ui->scrollUp->setEnabled(m_ui->categoryList->verticalScrollBar()->value() != 0);
@@ -134,10 +153,15 @@ void CategoryListWidget::emitCategoryChanged(int index)
/* =============================================================================================== */
CategoryListWidgetDelegate::CategoryListWidgetDelegate(QWidget* parent)
CategoryListWidgetDelegate::CategoryListWidgetDelegate(QListWidget* parent)
: QStyledItemDelegate(parent),
m_size(96, 96)
{}
m_listWidget(parent),
m_size(minWidth(), 96)
{
if (m_listWidget && m_listWidget->width() > m_size.width()) {
m_size.setWidth(m_listWidget->width());
}
}
void CategoryListWidgetDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
@@ -147,7 +171,7 @@ void CategoryListWidgetDelegate::paint(QPainter* painter, const QStyleOptionView
painter->save();
QIcon icon = opt.icon;
QSize iconSize = opt.icon.actualSize(QSize(32, 32));
QSize iconSize = opt.icon.actualSize(QSize(ICON_SIZE, ICON_SIZE));
opt.icon = QIcon();
opt.decorationAlignment = Qt::AlignHCenter | Qt::AlignVCenter;
opt.decorationPosition = QStyleOptionViewItem::Top;
@@ -156,7 +180,7 @@ void CategoryListWidgetDelegate::paint(QPainter* painter, const QStyleOptionView
style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, opt.widget);
QRect fontRect = painter->fontMetrics().boundingRect(
QRect(0, 0, m_size.width(), m_size.height()), Qt::AlignHCenter | Qt::AlignBottom | Qt::TextWordWrap, opt.text);
QRect(0, 0, minWidth(), m_size.height()), Qt::AlignHCenter | Qt::AlignBottom | Qt::TextWordWrap, opt.text);
int paddingTop = fontRect.height() < 30 ? 15 : 10;
int left = opt.rect.left() + opt.rect.width() / 2 - iconSize.width() / 2;
@@ -165,9 +189,33 @@ void CategoryListWidgetDelegate::paint(QPainter* painter, const QStyleOptionView
painter->restore();
}
int CategoryListWidgetDelegate::minWidth() const
{
int c = m_listWidget->count();
int maxWidth = 0;
for (int i = 0; i < c; ++i) {
QFontMetrics fm(m_listWidget->font());
QRect fontRect = fm.boundingRect(
QRect(0, 0, 0, 0), Qt::TextWordWrap | Qt::ElideNone, m_listWidget->item(i)->text());
if (fontRect.width() > maxWidth) {
maxWidth = fontRect.width();
}
}
return maxWidth > m_size.height() ? maxWidth + 5 : m_size.height();
}
QSize CategoryListWidgetDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
Q_UNUSED(option);
Q_UNUSED(index);
return m_size;
int w = minWidth();
if (m_listWidget->width() > w) {
w = m_listWidget->width();
}
return QSize(w, m_size.height());
}