testing gtk plugin for qt, updated error_str in loading

.travis/install.sh

@@ -1,16 +1,27 @@
 #!/bin/bash
 
 if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+
 	brew install ffmpeg qt5 python@2
 	export PATH="/usr/local/opt/qt/bin:/usr/local/opt/python@2/libexec/bin:$PATH"
+
 elif [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
-	if [ "$ARCH" == "x86_64" ]; then sudo apt-get -y install qt59base qt59multimedia libavformat-dev libavcodec-dev libavfilter-dev libavutil-dev libswscale-dev libswresample-dev frei0r-plugins-dev frei0r-plugins fuse; fi
-	if [ "$ARCH" == "i386" ]; then sudo apt-get -y install gcc-multilib g++-multilib qt59base:i386 qt59multimedia:i386 libavformat-dev:i386 libavcodec-dev:i386 libavfilter-dev:i386 libavutil-dev:i386 libswscale-dev:i386 libswresample-dev:i386 frei0r-plugins-dev:i386 frei0r-plugins:i386 pkg-config:i386 libgl1-mesa-dev:i386 fuse:i386; fi
+
+	if [ "$ARCH" == "x86_64" ]; then
+		sudo apt-get -y install qt59base qt59multimedia libavformat-dev libavcodec-dev libavfilter-dev libavutil-dev libswscale-dev libswresample-dev frei0r-plugins-dev frei0r-plugins fuse libgtk2.0-dev
+	fi
+
+	if [ "$ARCH" == "i386" ]; then
+		sudo apt-get -y install gcc-multilib g++-multilib qt59base:i386 qt59multimedia:i386 libavformat-dev:i386 libavcodec-dev:i386 libavfilter-dev:i386 libavutil-dev:i386 libswscale-dev:i386 libswresample-dev:i386 frei0r-plugins-dev:i386 frei0r-plugins:i386 pkg-config:i386 libgl1-mesa-dev:i386 fuse:i386 libgtk2.0-dev:i386
+	fi
 	source /opt/qt*/bin/qt*-env.sh
+
 elif [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
+
 	#/c/msys64/usr/bin/bash -l -c "pacman -Syu --noconfirm"
 
 	# install build tools
 	/c/msys64/usr/bin/bash -l -c "pacman -S --noconfirm mingw-w64-x86_64-toolchain mingw-w64-x86_64-ffmpeg mingw-w64-x86_64-qt5"
+
 fi
 

.travis/script.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+
 	# generate translation files
 	lrelease olive.pro
 
@@ -27,7 +28,17 @@ if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
 
 	# distribute in zip
 	zip -r Olive-$(git rev-parse --short HEAD)-macOS.zip Olive.app
+
 elif [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+
+	# get, compile, and install GTK style plugin
+	git clone http://code.qt.io/qt/qtstyleplugins.git
+	cd qtstyleplugins
+	qmake
+	make -j$(nproc)
+	make install
+	cd -
+
 	# generate translation files
 	lrelease olive.pro
 
@@ -55,7 +66,7 @@ elif [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
 	export VERSION=$(git rev-parse --short HEAD)
 
 	# use linuxdeployqt to set up dependencies
-	./linuxdeployqt-continuous-x86_64.AppImage appdir/usr/share/applications/*.desktop -appimage
+	./linuxdeployqt-continuous-x86_64.AppImage appdir/usr/share/applications/*.desktop -appimage -extra-plugins=platformthemes/libqgtk2.so,styles/libqgtk2style.so
 
 	# 64-bit linuxdeployqt can only generate a 64-bit AppImage
 	# to generate a 32-bit one, we need to download and run 32-bit AppImageTool
@@ -65,11 +76,14 @@ elif [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
 		chmod a+x appimagetool-i686.AppImage
 		./appimagetool-i686.AppImage "appdir" -n -g
 	fi
+
 elif [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
+
 	/c/msys64/mingw64/bin/qmake CONFIG+=release
 	/c/msys64/mingw64/bin/mingw32-make -f Makefile.Debug
 	mkdir olive-editor
 	mv olive-editor.exe olive-editor/
 	/c/msys64/mingw64/bin/windeployqt olive-editor/olive-editor.exe
 	7z a Olive-$(git rev-parse --short HEAD)-w64p.zip olive-editor
+
 fi

io/loadthread.cpp

@@ -698,7 +698,10 @@ void LoadThread::run() {
 			panel_project->start_preview_generator(loaded_media_items.at(i), true);
 		}
 	} else {
-		error_str = tr("User aborted loading");
+        if (error_str.isEmpty()) {
+            error_str = tr("User aborted loading");
+        }
+
 		emit error();
 	}