From 4a6becacca08fbb66d254fdca4870a33013df77a Mon Sep 17 00:00:00 2001
From: Konstantinos Sideris <sideris.konstantin@gmail.com>
Date: Fri, 16 Mar 2018 17:56:45 +0200
Subject: [PATCH] Add fancy snackbar animation

---
 CMakeLists.txt        |  8 +++++++-
 cmake/Tweeny.cmake    | 25 +++++++++++++++++++++++++
 include/ui/SnackBar.h |  1 -
 src/ui/SnackBar.cc    | 28 ++++++++++++++--------------
 4 files changed, 46 insertions(+), 16 deletions(-)
 create mode 100644 cmake/Tweeny.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 48c79496..ddbd3d35 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -217,6 +217,12 @@ set(SRC_FILES
 include(MatrixStructs)
 include_directories(${MATRIX_STRUCTS_INCLUDE_DIRS})
 
+#
+# libtweeny
+#
+include(Tweeny)
+include_directories(${TWEENY_INCLUDE_DIRS})
+
 #
 # lmdbxx
 #
@@ -342,7 +348,7 @@ else()
     target_link_libraries (nheko ${NHEKO_LIBS} Qt5::Multimedia)
 endif()
 
-add_dependencies(nheko MatrixStructs lmdbxx)
+add_dependencies(nheko MatrixStructs Tweeny lmdbxx)
 
 if(UNIX AND NOT APPLE)
     install (TARGETS nheko RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
diff --git a/cmake/Tweeny.cmake b/cmake/Tweeny.cmake
new file mode 100644
index 00000000..87a2ade8
--- /dev/null
+++ b/cmake/Tweeny.cmake
@@ -0,0 +1,25 @@
+include(ExternalProject)
+
+#
+# Build tweeny
+#
+
+set(THIRD_PARTY_ROOT ${CMAKE_SOURCE_DIR}/.third-party)
+set(TWEENY_ROOT ${THIRD_PARTY_ROOT}/tweeny)
+
+set(TWEENY_INCLUDE_DIRS ${TWEENY_ROOT}/include)
+
+ExternalProject_Add(
+  Tweeny
+
+  GIT_REPOSITORY https://github.com/mobius3/tweeny
+  GIT_TAG b94ce07cfb02a0eb8ac8aaf66137dabdaea857cf
+
+  BUILD_IN_SOURCE 1
+  SOURCE_DIR ${TWEENY_ROOT}
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND ""
+  INSTALL_COMMAND ""
+)
+
+include_directories(SYSTEM ${TWEENY_ROOT}/include)
diff --git a/include/ui/SnackBar.h b/include/ui/SnackBar.h
index bb579e92..89a8adaa 100644
--- a/include/ui/SnackBar.h
+++ b/include/ui/SnackBar.h
@@ -32,7 +32,6 @@ protected:
         void mousePressEvent(QMouseEvent *event) override;
 
 private slots:
-        void onTimeout();
         void hideMessage();
 
 private:
diff --git a/src/ui/SnackBar.cc b/src/ui/SnackBar.cc
index 1f02ee95..123d83e8 100644
--- a/src/ui/SnackBar.cc
+++ b/src/ui/SnackBar.cc
@@ -1,6 +1,8 @@
 #include <QDebug>
 #include <QPainter>
 
+#include <tweeny.h>
+
 #include "SnackBar.h"
 
 constexpr int STARTING_OFFSET = 1;
@@ -27,7 +29,18 @@ SnackBar::SnackBar(QWidget *parent)
         hideTimer_ = QSharedPointer<QTimer>(new QTimer);
         hideTimer_->setSingleShot(true);
 
-        connect(showTimer_.data(), SIGNAL(timeout()), this, SLOT(onTimeout()));
+        auto offset_anim = tweeny::from(1.0f).to(0.0f).during(4000).via(tweeny::easing::elasticOut);
+        connect(showTimer_.data(), &QTimer::timeout, this, [this, offset_anim]() mutable {
+                if (offset_anim.progress() < 1.0f) {
+                        offset_ = offset_anim.step(0.02f);
+                        update();
+                } else {
+                        showTimer_->stop();
+                        hideTimer_->start(duration_);
+                        offset_anim.seek(0.0f);
+                }
+        });
+
         connect(hideTimer_.data(), SIGNAL(timeout()), this, SLOT(hideMessage()));
 }
 
@@ -75,19 +88,6 @@ SnackBar::showMessage(const QString &msg)
         start();
 }
 
-void
-SnackBar::onTimeout()
-{
-        offset_ -= 1.1;
-
-        if (offset_ <= 0.0) {
-                showTimer_->stop();
-                hideTimer_->start(duration_);
-        }
-
-        update();
-}
-
 void
 SnackBar::mousePressEvent(QMouseEvent *)
 {