Merge pull request #411 from hwdro/master

Closes jp9000/obs-studio#411

obs/CMakeLists.txt

@@ -114,6 +114,7 @@ set(obs_SOURCES
 	visibility-checkbox.cpp
 	vertical-scroll-area.cpp
 	visibility-item-widget.cpp
+	slider-absoluteset-style.cpp
 	source-list-widget.cpp
 	crash-report.cpp
 	qt-wrappers.cpp)
@@ -148,6 +149,7 @@ set(obs_HEADERS
 	visibility-checkbox.hpp
 	vertical-scroll-area.hpp
 	visibility-item-widget.hpp
+	slider-absoluteset-style.hpp
 	source-list-widget.hpp
 	qt-display.hpp
 	crash-report.hpp

obs/slider-absoluteset-style.cpp

@@ -0,0 +1,19 @@
+#include "slider-absoluteset-style.hpp"
+
+SliderAbsoluteSetStyle::SliderAbsoluteSetStyle(const QString& baseStyle)
+	:QProxyStyle(baseStyle)
+{
+}
+SliderAbsoluteSetStyle::SliderAbsoluteSetStyle(QStyle* baseStyle)
+	:QProxyStyle(baseStyle)
+{
+}
+
+int SliderAbsoluteSetStyle::styleHint(QStyle::StyleHint hint,
+	const QStyleOption* option = 0, const QWidget* widget = 0,
+	QStyleHintReturn* returnData = 0) const
+{
+	if(hint == QStyle::SH_Slider_AbsoluteSetButtons)
+		return (Qt::LeftButton | Qt::MidButton);
+	return QProxyStyle::styleHint(hint, option, widget, returnData);
+}

obs/slider-absoluteset-style.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <QProxyStyle>
+
+class SliderAbsoluteSetStyle : public QProxyStyle
+{
+public:
+	SliderAbsoluteSetStyle(const QString& baseStyle);
+	SliderAbsoluteSetStyle(QStyle* baseStyle);
+	int styleHint(QStyle::StyleHint hint, const QStyleOption* option,
+		const QWidget* widget, QStyleHintReturn* returnData) const;
+};

obs/volume-control.cpp

@@ -1,6 +1,7 @@
 #include "volume-control.hpp"
 #include "qt-wrappers.hpp"
 #include "mute-checkbox.hpp"
+#include "slider-absoluteset-style.hpp"
 #include <util/platform.h>
 #include <QHBoxLayout>
 #include <QVBoxLayout>
@@ -161,6 +162,8 @@ VolControl::VolControl(OBSSource source_)
 	obs_fader_attach_source(obs_fader, source);
 	obs_volmeter_attach_source(obs_volmeter, source);
 
+	slider->setStyle(new SliderAbsoluteSetStyle(slider->style()));
+
 	/* Call volume changed once to init the slider position and label */
 	VolumeChanged();
 }