151 lines
3.2 KiB
C++
151 lines
3.2 KiB
C++
|
#include <QtWidgets>
|
||
|
|
||
|
#include "flowlayout.h"
|
||
|
FlowLayout::FlowLayout(QWidget *parent, int margin, int hSpacing, int vSpacing)
|
||
|
: QLayout(parent), m_hSpace(hSpacing), m_vSpace(vSpacing)
|
||
|
{
|
||
|
setContentsMargins(margin, margin, margin, margin);
|
||
|
}
|
||
|
|
||
|
FlowLayout::FlowLayout(int margin, int hSpacing, int vSpacing)
|
||
|
: m_hSpace(hSpacing), m_vSpace(vSpacing)
|
||
|
{
|
||
|
setContentsMargins(margin, margin, margin, margin);
|
||
|
}
|
||
|
|
||
|
FlowLayout::~FlowLayout()
|
||
|
{
|
||
|
QLayoutItem *item;
|
||
|
while ((item = takeAt(0)))
|
||
|
delete item;
|
||
|
}
|
||
|
|
||
|
void FlowLayout::addItem(QLayoutItem *item)
|
||
|
{
|
||
|
itemList.append(item);
|
||
|
}
|
||
|
|
||
|
int FlowLayout::horizontalSpacing() const
|
||
|
{
|
||
|
if (m_hSpace >= 0) {
|
||
|
return m_hSpace;
|
||
|
} else {
|
||
|
return smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
int FlowLayout::verticalSpacing() const
|
||
|
{
|
||
|
if (m_vSpace >= 0) {
|
||
|
return m_vSpace;
|
||
|
} else {
|
||
|
return smartSpacing(QStyle::PM_LayoutVerticalSpacing);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
int FlowLayout::count() const
|
||
|
{
|
||
|
return itemList.size();
|
||
|
}
|
||
|
|
||
|
QLayoutItem *FlowLayout::itemAt(int index) const
|
||
|
{
|
||
|
return itemList.value(index);
|
||
|
}
|
||
|
|
||
|
QLayoutItem *FlowLayout::takeAt(int index)
|
||
|
{
|
||
|
if (index >= 0 && index < itemList.size())
|
||
|
return itemList.takeAt(index);
|
||
|
else
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
Qt::Orientations FlowLayout::expandingDirections() const
|
||
|
{
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
bool FlowLayout::hasHeightForWidth() const
|
||
|
{
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
int FlowLayout::heightForWidth(int width) const
|
||
|
{
|
||
|
int height = doLayout(QRect(0, 0, width, 0), true);
|
||
|
return height;
|
||
|
}
|
||
|
|
||
|
void FlowLayout::setGeometry(const QRect &rect)
|
||
|
{
|
||
|
QLayout::setGeometry(rect);
|
||
|
doLayout(rect, false);
|
||
|
}
|
||
|
|
||
|
QSize FlowLayout::sizeHint() const
|
||
|
{
|
||
|
return minimumSize();
|
||
|
}
|
||
|
|
||
|
QSize FlowLayout::minimumSize() const
|
||
|
{
|
||
|
QSize size;
|
||
|
QLayoutItem *item;
|
||
|
foreach (item, itemList)
|
||
|
size = size.expandedTo(item->minimumSize());
|
||
|
|
||
|
size += QSize(2*margin(), 2*margin());
|
||
|
return size;
|
||
|
}
|
||
|
|
||
|
int FlowLayout::doLayout(const QRect &rect, bool testOnly) const
|
||
|
{
|
||
|
int left, top, right, bottom;
|
||
|
getContentsMargins(&left, &top, &right, &bottom);
|
||
|
QRect effectiveRect = rect.adjusted(+left, +top, -right, -bottom);
|
||
|
int x = effectiveRect.x();
|
||
|
int y = effectiveRect.y();
|
||
|
int lineHeight = 0;
|
||
|
|
||
|
QLayoutItem *item;
|
||
|
foreach (item, itemList) {
|
||
|
QWidget *wid = item->widget();
|
||
|
int spaceX = horizontalSpacing();
|
||
|
if (spaceX == -1)
|
||
|
spaceX = wid->style()->layoutSpacing(
|
||
|
QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Horizontal);
|
||
|
int spaceY = verticalSpacing();
|
||
|
if (spaceY == -1)
|
||
|
spaceY = wid->style()->layoutSpacing(
|
||
|
QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Vertical);
|
||
|
int nextX = x + item->sizeHint().width() + spaceX;
|
||
|
if (nextX - spaceX > effectiveRect.right() && lineHeight > 0) {
|
||
|
x = effectiveRect.x();
|
||
|
y = y + lineHeight + spaceY;
|
||
|
nextX = x + item->sizeHint().width() + spaceX;
|
||
|
lineHeight = 0;
|
||
|
}
|
||
|
|
||
|
if (!testOnly)
|
||
|
item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
|
||
|
|
||
|
x = nextX;
|
||
|
lineHeight = qMax(lineHeight, item->sizeHint().height());
|
||
|
}
|
||
|
return y + lineHeight - rect.y() + bottom;
|
||
|
}
|
||
|
int FlowLayout::smartSpacing(QStyle::PixelMetric pm) const
|
||
|
{
|
||
|
QObject *parent = this->parent();
|
||
|
if (!parent) {
|
||
|
return -1;
|
||
|
} else if (parent->isWidgetType()) {
|
||
|
QWidget *pw = static_cast<QWidget *>(parent);
|
||
|
return pw->style()->pixelMetric(pm, 0, pw);
|
||
|
} else {
|
||
|
return static_cast<QLayout *>(parent)->spacing();
|
||
|
}
|
||
|
}
|
||
|
|