<table><tr><td style="">davidre added a comment.
</td><a style="text-decoration: none; padding: 4px 8px; margin: 0 8px 8px; float: right; color: #464C5C; font-weight: bold; border-radius: 3px; background-color: #F7F7F9; background-image: linear-gradient(to bottom,#fff,#f1f0f1); display: inline-block; border: 1px solid rgba(71,87,120,.2);" href="https://phabricator.kde.org/D23651">View Revision</a></tr></table><br /><div><div><p>The reason it's transparent is because the clear color of the buffer is set to the background color when it's changed [1][2]. <br />
This worked before probably because the Color was (0, 0, 0). For transparent windows we need to set it to <tt style="background: #ebebeb; font-size: 13px;">Qt::transparent</tt>[3] and enable an  alpha buffer[4].</p>

<p><a href="https://phabricator.kde.org/F7309362" style="background-color: #e7e7e7;
          border-color: #e7e7e7;
          border-radius: 3px;
          padding: 0 4px;
          font-weight: bold;
          color: black;text-decoration: none;">F7309362: Screenshot_20190902_171545.png</a></p>

<div class="remarkup-code-block" style="margin: 12px 0;" data-code-lang="diff" data-sigil="remarkup-code-block"><pre class="remarkup-code" style="font: 11px/15px "Menlo", "Consolas", "Monaco", monospace; padding: 12px; margin: 0; background: rgba(71, 87, 120, 0.08);"><span style="color: #000080">diff --git a/applets/kicker/plugin/dashboardwindow.cpp b/applets/kicker/plugin/dashboardwindow.cpp</span>
<span style="color: #000080">index 6665e8df7..cc6b70c32 100644</span>
<span style="color: #a00000">--- a/applets/kicker/plugin/dashboardwindow.cpp</span>
<span style="color: #00a000">+++ b/applets/kicker/plugin/dashboardwindow.cpp</span>
<span style="color: #800080">@@ -32,6 +32,8 @@ DashboardWindow::DashboardWindow(QQuickItem *parent) : QQuickWindow(parent ? par</span>
 , m_visualParentWindow(nullptr)
 {
     setClearBeforeRendering(true);
<span style="color: #00a000">+    setDefaultAlphaBuffer(true);</span>
<span style="color: #00a000">+    setColor(Qt::transparent);</span>
     setFlags(Qt::FramelessWindowHint);
 
     setIcon(QIcon::fromTheme(QStringLiteral("plasma")));
<span style="color: #800080">@@ -100,8 +102,6 @@ QColor DashboardWindow::backgroundColor() const</span>
 void DashboardWindow::setBackgroundColor(const QColor &c)
 {
     if (color() != c) {
<span style="color: #a00000">-        setColor(c);</span>
<span style="color: #a00000">-</span>
         emit backgroundColorChanged();
     }
 }</pre></div>

<p>[1] <a href="https://cgit.kde.org/plasma-desktop.git/tree/applets/kicker/plugin/dashboardwindow.cpp#n103" class="remarkup-link" target="_blank" rel="noreferrer">https://cgit.kde.org/plasma-desktop.git/tree/applets/kicker/plugin/dashboardwindow.cpp#n103</a><br />
[2]<a href="https://doc.qt.io/qt-5/qquickwindow.html#color-prop" class="remarkup-link" target="_blank" rel="noreferrer">https://doc.qt.io/qt-5/qquickwindow.html#color-prop</a><br />
[3]<a href="https://doc.qt.io/qt-5/qquickwidget.html#details" class="remarkup-link" target="_blank" rel="noreferrer">https://doc.qt.io/qt-5/qquickwidget.html#details</a> (see Limitations)<br />
[4]<a href="https://doc.qt.io/qt-5/qquickwindow.html#setDefaultAlphaBuffer" class="remarkup-link" target="_blank" rel="noreferrer">https://doc.qt.io/qt-5/qquickwindow.html#setDefaultAlphaBuffer</a></p></div></div><br /><div><strong>REPOSITORY</strong><div><div>R119 Plasma Desktop</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D23651">https://phabricator.kde.org/D23651</a></div></div><br /><div><strong>To: </strong>ognarb, Plasma, VDG<br /><strong>Cc: </strong>davidre, felixernst, plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart<br /></div>