bunch of stuff. very basic drag/drop now working

2024-05-20 03:23:01 -05:00
commit fac2260a01
28 changed files with 1631 additions and 0 deletions
--- a/flowlayout.cpp
+++ b/flowlayout.cpp
@@ -0,0 +1,154 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QtWidgets>
+
+#include "flowlayout.h"
+//! [1]
+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()
+{
+    for (auto& child : itemList)
+    {
+        delete child;
+        child = nullptr;
+    }
+    itemList.clear();
+}
+
+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);
+    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 : std::as_const(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 : std::as_const(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();
+    }
+}