From b936bccd9d0d7f50f37c078b7aad9e75ee9fc981 Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Sat, 16 Jun 2018 09:46:48 +0200
Subject: Add Plasma option to cmake that turns on KF5 blur window effect

---
 CMakeLists.txt                |  7 +++++++
 linux/makepkg/PKGBUILD        |  3 +++
 src/CMakeLists.txt            | 10 +++++++++-
 src/mainwindow/mainwindow.cpp | 10 ++++++++++
 4 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb86ce6..a4f64d2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,12 +9,19 @@ option(CompilerWarnings "Compiler warnings" ON)
 option(QtDeprecatedWarnings "Qt deprecated warnings" ON)
 option(UseLibCpp "Use libc++ over stdlibc++ (requires clang)" OFF)
 option(Tests "Enable/disable some basic autotests" ON)
+option(Plasma "Enable some fancy effects on Plasma" OFF)
 
 # Libraries
 find_package(Qt5 COMPONENTS Core Widgets Concurrent REQUIRED)
 find_package(Qt5 5.10.1 COMPONENTS WebEngineWidgets REQUIRED)
 find_package(Boost COMPONENTS program_options REQUIRED)
 
+if(Plasma)
+    find_package(ECM 1.6.0 REQUIRED NO_MODULE)
+    set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
+    find_package(KF5 "5.6.0" COMPONENTS WindowSystem REQUIRED)
+endif(Plasma)
+
 # Global C++ settings
 set(CMAKE_CXX_STANDARD 17)
 
diff --git a/linux/makepkg/PKGBUILD b/linux/makepkg/PKGBUILD
index b088409..d3010f2 100644
--- a/linux/makepkg/PKGBUILD
+++ b/linux/makepkg/PKGBUILD
@@ -68,6 +68,9 @@ build() {
     # Flavour, also requires clang
     #_cmake_options="$_cmake_options -DUseLibCpp=On"
 
+    # Flavour: add some KF5 effects
+    _cmake_options="$_cmake_options -DPlasma=On"
+
     # Build System
     # Flavour: I use ninja, but you can comment this out, or set your own
     # flavour. Don't forget to change the Build and Install though!
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0c6876d..cf66a53 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -58,7 +58,15 @@ target_link_libraries(poi
         about
         addressbar
         configuration
-        bookmarks downloads web)
+        bookmarks downloads web
+)
+
+if(Plasma)
+    target_link_libraries(poi KF5::WindowSystem)
+    target_compile_definitions(poi
+        PRIVATE PLASMA_BLUR     # give the main window a translucent background and blur
+    )
+endif(Plasma)
 
 target_compile_definitions(poi
     PRIVATE QTBUG_65223_WORKAROUND
diff --git a/src/mainwindow/mainwindow.cpp b/src/mainwindow/mainwindow.cpp
index 6558c65..b2c79cc 100644
--- a/src/mainwindow/mainwindow.cpp
+++ b/src/mainwindow/mainwindow.cpp
@@ -30,6 +30,10 @@
 #include <QJsonArray>
 #include "browser.h"
 
+#ifdef PLASMA_BLUR
+#include <KWindowEffects>
+#endif
+
 MainWindow::MainWindow(std::shared_ptr<Configuration> &config, QWidget *parent)
     : QMainWindow(parent)
     , mdiArea(new QMdiArea(this))
@@ -37,6 +41,11 @@ MainWindow::MainWindow(std::shared_ptr<Configuration> &config, QWidget *parent)
     Q_ASSERT(config);
     m_config = config;
 
+#ifdef PLASMA_BLUR
+    setAttribute(Qt::WA_TranslucentBackground, true);
+    KWindowEffects::enableBlurBehind(this->winId(), true);
+#endif
+
     // create UI
     setWindowTitle(QString::fromStdString(config->value<std::string>("mainwindow.title").value()));
     resize(config->value<int>("mainwindow.width").value(), config->value<int>("mainwindow.height").value());
@@ -55,6 +64,7 @@ MainWindow::MainWindow(std::shared_ptr<Configuration> &config, QWidget *parent)
     addressBar = new AddressBar(config->section("addressbar"), this);
     navigationToolBar->addWidget(addressBar);
 
+    mdiArea->setBackground(Qt::NoBrush);
     setCentralWidget(mdiArea);
     mdiArea->setFocus();
 
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