Add dynamic FlowLayout class

This commit is contained in:
BigBahss 2020-10-20 13:48:45 -04:00
parent 68d4f47dbb
commit bb61dc9b51
3 changed files with 175 additions and 0 deletions

37
include/ui/flowlayout.h Normal file
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@ -0,0 +1,37 @@
#ifndef FLOWLAYOUT_H
#define FLOWLAYOUT_H
#include <QLayout>
#include <QStyle>
class FlowLayout : public QLayout
{
public:
explicit FlowLayout(QWidget *parent, int margin = -1, int hSpacing = -1, int vSpacing = -1);
explicit FlowLayout(int margin = -1, int hSpacing = -1, int vSpacing = -1);
~FlowLayout();
void addItem(QLayoutItem *item) override;
int horizontalSpacing() const;
int verticalSpacing() const;
Qt::Orientations expandingDirections() const override;
bool hasHeightForWidth() const override;
int heightForWidth(int) const override;
int count() const override;
QLayoutItem *itemAt(int index) const override;
QSize minimumSize() const override;
void setGeometry(const QRect &rect) override;
QSize sizeHint() const override;
QLayoutItem *takeAt(int index) override;
private:
int doLayout(const QRect &rect, bool testOnly) const;
int smartSpacing(QStyle::PixelMetric pm) const;
QList<QLayoutItem *> itemList;
int horzSpace;
int vertSpace;
};
#endif // FLOWLAYOUT_H

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@ -68,6 +68,7 @@ SOURCES += src/core/block.cpp \
src/ui/regionmapeditor.cpp \ src/ui/regionmapeditor.cpp \
src/ui/newmappopup.cpp \ src/ui/newmappopup.cpp \
src/ui/mapimageexporter.cpp \ src/ui/mapimageexporter.cpp \
src/ui/flowlayout.cpp \
src/config.cpp \ src/config.cpp \
src/editor.cpp \ src/editor.cpp \
src/main.cpp \ src/main.cpp \
@ -134,6 +135,7 @@ HEADERS += include/core/block.h \
include/ui/regionmapeditor.h \ include/ui/regionmapeditor.h \
include/ui/newmappopup.h \ include/ui/newmappopup.h \
include/ui/mapimageexporter.h \ include/ui/mapimageexporter.h \
include/ui/flowlayout.h \
include/config.h \ include/config.h \
include/editor.h \ include/editor.h \
include/mainwindow.h \ include/mainwindow.h \

136
src/ui/flowlayout.cpp Normal file
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#include <flowlayout.h>
#include <QWidget>
FlowLayout::FlowLayout(QWidget *parent, int margin, int hSpacing, int vSpacing) :
QLayout(parent),
horzSpace(hSpacing),
vertSpace(vSpacing)
{
setContentsMargins(margin, margin, margin, margin);
}
FlowLayout::FlowLayout(int margin, int hSpacing, int vSpacing) :
horzSpace(hSpacing),
vertSpace(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 (horzSpace >= 0)
return horzSpace;
else
return smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
}
int FlowLayout::verticalSpacing() const {
if (vertSpace >= 0)
return vertSpace;
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);
return nullptr;
}
Qt::Orientations FlowLayout::expandingDirections() const {
return { };
}
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;
for (const QLayoutItem *item : qAsConst(itemList))
size = size.expandedTo(item->minimumSize());
const QMargins margins = contentsMargins();
size += QSize(margins.left() + margins.right(), margins.top() + margins.bottom());
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;
for (QLayoutItem *item : qAsConst(itemList)) {
const 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, nullptr, pw);
} else {
return static_cast<QLayout *>(parent)->spacing();
}
}