From e8a560faee30b2c24015453e33d72f16c9290be8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=9F=B3=E5=8D=9A=E6=96=87?= <sbw@sbw.so>
Date: Wed, 24 May 2017 10:56:43 +0800
Subject: [PATCH] draw preview window content at floating window

Change-Id: I9d8e16463b3f84de331a0da76f3126ef659cc488
---
 frame/item/components/_previewcontainer.cpp |  5 +++--
 frame/item/components/appsnapshot.cpp       | 10 ++++++---
 frame/item/components/appsnapshot.h         |  4 ++++
 frame/item/components/floatingpreview.cpp   | 25 ++++++++++++++++++++-
 4 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/frame/item/components/_previewcontainer.cpp b/frame/item/components/_previewcontainer.cpp
index 2d8fc75df..15bca9c65 100644
--- a/frame/item/components/_previewcontainer.cpp
+++ b/frame/item/components/_previewcontainer.cpp
@@ -4,8 +4,8 @@
 #include <QScreen>
 #include <QApplication>
 
-#define SPACING           5
-#define MARGIN            5
+#define SPACING           0
+#define MARGIN            0
 
 _PreviewContainer::_PreviewContainer(QWidget *parent)
     : QWidget(parent),
@@ -49,6 +49,7 @@ void _PreviewContainer::setWindowInfos(const WindowDict &infos)
     {
         if (!m_snapshots.contains(it.key()))
             appendSnapWidget(it.key());
+        m_snapshots[it.key()]->setWindowTitle(it.value());
     }
 
     adjustSize();
diff --git a/frame/item/components/appsnapshot.cpp b/frame/item/components/appsnapshot.cpp
index 92ccf7e72..cd458a1d2 100644
--- a/frame/item/components/appsnapshot.cpp
+++ b/frame/item/components/appsnapshot.cpp
@@ -42,6 +42,11 @@ void AppSnapshot::closeWindow() const
     XFlush(display);
 }
 
+void AppSnapshot::setWindowTitle(const QString &title)
+{
+    m_title = title;
+}
+
 void AppSnapshot::fetchSnapshot()
 {
     if (!isVisible())
@@ -105,7 +110,7 @@ void AppSnapshot::paintEvent(QPaintEvent *e)
     if (m_snapshot.isNull())
         return;
 
-    const QRect r = rect();
+    const QRect r = rect().marginsRemoved(QMargins(8, 8, 8, 8));
 
     // draw image
 //    const QPoint offset = r.center() - ir.center();
@@ -113,8 +118,7 @@ void AppSnapshot::paintEvent(QPaintEvent *e)
 //    painter.fillRect(offset.x(), offset.y(), ir.width(), ir.height(), Qt::white);
 //    painter.drawImage(offset.x(), offset.y(), m_snapshot);
 //    painter.fillRect(r, Qt::white);
-    const QSize s = size();
-    const QImage im = m_snapshot.scaled(s, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    const QImage im = m_snapshot.scaled(r.size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
     const QRect ir = im.rect();
     const QPoint offset = r.center() - ir.center();
     painter.drawImage(offset.x(), offset.y(), im);
diff --git a/frame/item/components/appsnapshot.h b/frame/item/components/appsnapshot.h
index d5164d534..3335889f4 100644
--- a/frame/item/components/appsnapshot.h
+++ b/frame/item/components/appsnapshot.h
@@ -13,6 +13,8 @@ public:
     explicit AppSnapshot(const WId wid, QWidget *parent = 0);
 
     WId wid() const { return m_wid; }
+    const QImage snapshot() const { return m_snapshot; }
+    const QString title() const { return m_title; }
 
 signals:
     void entered(const WId wid) const;
@@ -20,6 +22,7 @@ signals:
 
 public slots:
     void closeWindow() const;
+    void setWindowTitle(const QString &title);
 
 private slots:
     void fetchSnapshot();
@@ -33,6 +36,7 @@ private:
 private:
     const WId m_wid;
 
+    QString m_title;
     QImage m_snapshot;
 
     QTimer *m_fetchSnapshotTimer;
diff --git a/frame/item/components/floatingpreview.cpp b/frame/item/components/floatingpreview.cpp
index f850a0fa5..a868975d4 100644
--- a/frame/item/components/floatingpreview.cpp
+++ b/frame/item/components/floatingpreview.cpp
@@ -42,9 +42,32 @@ void FloatingPreview::paintEvent(QPaintEvent *e)
 {
     QWidget::paintEvent(e);
 
+    if (m_tracked.isNull())
+        return;
+
     QPainter painter(this);
 
-    painter.fillRect(rect(), Qt::red);
+    const QRect r = rect().marginsRemoved(QMargins(8, 8, 8, 8));
+    const QImage snapshot = m_tracked->snapshot();
+    const QImage im = snapshot.scaled(r.size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    const QRect ir = im.rect();
+    const QPoint offset = r.center() - ir.center();
+    painter.fillRect(r, Qt::black);
+    painter.drawImage(offset.x(), offset.y(), im);
+
+    // bottom black background
+    QRect bgr = r;
+    bgr.setTop(bgr.bottom() - 25);
+    painter.fillRect(bgr, QColor(0, 0, 0, 255 * 0.3));
+
+    // bottom title
+    painter.drawText(bgr, Qt::AlignCenter, m_tracked->title());
+
+    // draw border
+    const QRect br = r.marginsAdded(QMargins(1, 1, 1, 1));
+    painter.setBrush(Qt::transparent);
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.drawRoundedRect(br, 3, 3);
 }
 
 void FloatingPreview::mouseReleaseEvent(QMouseEvent *e)