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Start: add dynamic layout FlowLayout

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wmayer
2024-04-23 23:53:03 +02:00
parent 690b3c97e4
commit 3cf9b767ac
3 changed files with 270 additions and 0 deletions
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2
src/Mod/Start/Gui/CMakeLists.txt
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@@ -53,6 +53,8 @@ SET(StartGui_SRCS
FileCardDelegate.h
FileCardView.cpp
FileCardView.h
FlowLayout.cpp
FlowLayout.h
Manipulator.cpp
Manipulator.h
PreCompiled.cpp

193
src/Mod/Start/Gui/FlowLayout.cpp Normal file
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@@ -0,0 +1,193 @@
// SPDX-License-Identifier: LGPL-2.1-or-later
/***************************************************************************
* Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net> *
* *
* This file is part of FreeCAD. *
* *
* FreeCAD is free software: you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 2.1 of the *
* License, or (at your option) any later version. *
* *
* FreeCAD is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with FreeCAD. If not, see *
* <https://www.gnu.org/licenses/>. *
* *
**************************************************************************/
#include "PreCompiled.h"
#include <QWidget>
#include "FlowLayout.h"
using namespace StartGui;
FlowLayout::FlowLayout(QWidget* parent, int margin, int hSpacing, int vSpacing)
: QLayout(parent)
, hSpace {hSpacing}
, 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 (hSpace >= 0) {
return hSpace;
}
return smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
}
int FlowLayout::verticalSpacing() const
{
if (vSpace >= 0) {
return vSpace;
}
return smartSpacing(QStyle::PM_LayoutVerticalSpacing);
}
int FlowLayout::count() const
{
return itemList.size();
}
QLayoutItem* FlowLayout::itemAt(int index) const
{
if (index >= 0 && index < itemList.size()) {
return itemList[index];
}
return nullptr;
}
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 (auto item : qAsConst(itemList)) {
size = size.expandedTo(item->minimumSize());
}
QMargins margins = contentsMargins();
size += QSize(margins.left() + margins.right(), margins.top() + margins.bottom());
return size;
}
int FlowLayout::smartSpacing(QStyle::PixelMetric pm) const
{
QObject* par = parent();
if (!par) {
return -1;
}
if (par->isWidgetType()) {
auto widget = qobject_cast<QWidget*>(par);
return widget->style()->pixelMetric(pm, nullptr, widget);
}
return static_cast<QLayout*>(par)->spacing();
}
int FlowLayout::doLayout(const QRect& rect, bool testOnly) const
{
int left {};
int top {};
int right {};
int 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 (auto item : qAsConst(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 = std::max(lineHeight, item->sizeHint().height());
}
return y + lineHeight - rect.y() + bottom;
}
#include "moc_FlowLayout.cpp"

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src/Mod/Start/Gui/FlowLayout.h Normal file
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@@ -0,0 +1,75 @@
// SPDX-License-Identifier: LGPL-2.1-or-later
/***************************************************************************
* Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net> *
* *
* This file is part of FreeCAD. *
* *
* FreeCAD is free software: you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 2.1 of the *
* License, or (at your option) any later version. *
* *
* FreeCAD is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with FreeCAD. If not, see *
* <https://www.gnu.org/licenses/>. *
* *
**************************************************************************/
#ifndef FREECAD_FLOWLAYOUT_H
#define FREECAD_FLOWLAYOUT_H
#include <QLayout>
#include <QList>
#include <QStyle>
namespace StartGui
{
/*!
* \brief The FlowLayout class
* Based on https://forum.qt.io/topic/109408/is-there-a-qt-layout-grid-that-can-dynamically-
* change-row-and-column-counts-to-best-fit-the-space
*/
class FlowLayout: public QLayout
{
Q_OBJECT
public:
explicit FlowLayout(QWidget* parent = nullptr,
int margin = -1,
int hSpacing = -1,
int vSpacing = -1);
~FlowLayout() override;
void addItem(QLayoutItem* item) override;
int count() const override;
QLayoutItem* itemAt(int index) const override;
QLayoutItem* takeAt(int index) override;
Qt::Orientations expandingDirections() const override;
bool hasHeightForWidth() const override;
int heightForWidth(int width) const override;
void setGeometry(const QRect& rect) override;
QSize sizeHint() const override;
QSize minimumSize() const override;
private:
int horizontalSpacing() const;
int verticalSpacing() const;
int smartSpacing(QStyle::PixelMetric pm) const;
int doLayout(const QRect& rect, bool testOnly) const;
private:
QList<QLayoutItem*> itemList;
int hSpace = -1;
int vSpace = -1;
};
} // namespace StartGui
#endif // FREECAD_FLOWLAYOUT_H