增加预览页介绍信息显示

client/gui/dialogs/EntityIntroPopup.cpp

@@ -0,0 +1,176 @@
+#include "dialogs/EntityIntroPopup.h"
+
+#include <QDir>
+#include <QFileInfo>
+#include <QGuiApplication>
+#include <QLabel>
+#include <QScreen>
+#include <QPainter>
+#include <QPaintEvent>
+#include <QPixmap>
+#include <QStyleOption>
+#include <QTextEdit>
+#include <QVBoxLayout>
+
+namespace gui {
+
+namespace {
+
+constexpr int kMaxThumb = 200;
+
+QString elideLine(const QString& s, int maxChars) {
+    if (s.size() <= maxChars) {
+        return s;
+    }
+    return s.left(maxChars - 1) + QChar(0x2026);
+}
+
+}  // namespace
+
+EntityIntroPopup::EntityIntroPopup(QWidget* parent)
+    : QWidget(parent) {
+    setAttribute(Qt::WA_TranslucentBackground, false);
+    setWindowFlags(Qt::Tool | Qt::FramelessWindowHint);
+
+    auto* root = new QVBoxLayout(this);
+    root->setContentsMargins(14, 12, 14, 12);
+    root->setSpacing(8);
+
+    m_title = new QLabel(this);
+    QFont tf = m_title->font();
+    tf.setBold(true);
+    tf.setPointSizeF(tf.pointSizeF() + 1.5);
+    m_title->setFont(tf);
+    m_title->setWordWrap(true);
+    root->addWidget(m_title);
+
+    m_body = new QTextEdit(this);
+    m_body->setReadOnly(true);
+    m_body->setFrameShape(QFrame::NoFrame);
+    m_body->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    m_body->setMaximumHeight(180);
+    m_body->setPlaceholderText(QStringLiteral("（无）"));
+    root->addWidget(m_body);
+
+    m_imagesHost = new QWidget(this);
+    m_imagesLayout = new QVBoxLayout(m_imagesHost);
+    m_imagesLayout->setContentsMargins(0, 0, 0, 0);
+    m_imagesLayout->setSpacing(6);
+    root->addWidget(m_imagesHost);
+
+    m_videoHint = new QLabel(this);
+    m_videoHint->setWordWrap(true);
+    m_videoHint->setStyleSheet(QStringLiteral("QLabel { color: palette(mid); font-size: 11px; }"));
+    root->addWidget(m_videoHint);
+
+    setMinimumWidth(280);
+    setMaximumWidth(420);
+    hide();
+}
+
+void EntityIntroPopup::setProjectDir(const QString& absoluteProjectDir) {
+    m_projectDirAbs = absoluteProjectDir;
+}
+
+void EntityIntroPopup::setContent(const core::EntityIntroContent& content) {
+    const QString t = content.title.trimmed().isEmpty()
+                          ? QStringLiteral("介绍")
+                          : content.title.trimmed();
+    m_title->setText(elideLine(t, 200));
+    m_body->setPlainText(content.bodyText);
+
+    while (QLayoutItem* it = m_imagesLayout->takeAt(0)) {
+        if (QWidget* w = it->widget()) {
+            w->deleteLater();
+        }
+        delete it;
+    }
+
+    for (const QString& rel : content.imagePathsRelative) {
+        if (rel.isEmpty()) {
+            continue;
+        }
+        const QString abs =
+            m_projectDirAbs.isEmpty() ? QString() : QDir(m_projectDirAbs).filePath(rel);
+        auto* lab = new QLabel(m_imagesHost);
+        lab->setAlignment(Qt::AlignCenter);
+        if (!abs.isEmpty() && QFileInfo::exists(abs)) {
+            QPixmap pm(abs);
+            if (!pm.isNull()) {
+                if (pm.width() > kMaxThumb || pm.height() > kMaxThumb) {
+                    pm = pm.scaled(kMaxThumb, kMaxThumb, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+                }
+                lab->setPixmap(pm);
+            } else {
+                lab->setText(QStringLiteral("（无法加载图片）"));
+            }
+        } else {
+            lab->setText(QStringLiteral("（缺少文件：%1）").arg(rel));
+        }
+        lab->setWordWrap(true);
+        m_imagesLayout->addWidget(lab);
+    }
+
+    if (content.videoPathRelative.trimmed().isEmpty()) {
+        m_videoHint->setText(QStringLiteral("视频介绍"));
+    } else {
+        m_videoHint->setText(QStringLiteral("播放功能预留").arg(content.videoPathRelative));
+    }
+    adjustSize();
+}
+
+void EntityIntroPopup::showNearCanvasPoint(const QPoint& viewPos, QWidget* canvasWidget) {
+    if (!canvasWidget) {
+        return;
+    }
+    adjustSize();
+    const QPoint globalAnchor = canvasWidget->mapToGlobal(viewPos);
+    QScreen* scr = QGuiApplication::screenAt(globalAnchor);
+    if (!scr) {
+        scr = canvasWidget->screen();
+    }
+    const QRect screen = scr ? scr->availableGeometry() : QRect(0, 0, 1920, 1080);
+
+    int x = globalAnchor.x() + 18;
+    int y = globalAnchor.y() - height() / 3;
+    if (x + width() > screen.right()) {
+        x = globalAnchor.x() - width() - 18;
+    }
+    if (x < screen.left()) {
+        x = screen.left() + 8;
+    }
+    if (y + height() > screen.bottom()) {
+        y = screen.bottom() - height() - 8;
+    }
+    if (y < screen.top()) {
+        y = screen.top() + 8;
+    }
+    move(x, y);
+    show();
+    raise();
+}
+
+void EntityIntroPopup::clearAndHide() {
+    hide();
+    m_title->clear();
+    m_body->clear();
+    while (QLayoutItem* it = m_imagesLayout->takeAt(0)) {
+        if (QWidget* w = it->widget()) {
+            w->deleteLater();
+        }
+        delete it;
+    }
+    m_videoHint->clear();
+}
+
+void EntityIntroPopup::paintEvent(QPaintEvent* e) {
+    Q_UNUSED(e);
+    QPainter p(this);
+    p.setRenderHint(QPainter::Antialiasing, true);
+    const QRect r = rect().adjusted(1, 1, -1, -1);
+    p.fillRect(r, palette().base());
+    p.setPen(QPen(palette().mid().color(), 1));
+    p.drawRoundedRect(r, 8, 8);
+}
+
+}  // namespace gui