From a8cbd0a9cd2d3ffd37f26f04bedd92ca76bb91d1 Mon Sep 17 00:00:00 2001
From: Black Hat <bhat@encom.eu.org>
Date: Sun, 18 Nov 2018 20:08:01 +0800
Subject: [PATCH] Init custom DPI.

---
 imports/Spectral/Panel/RoomListPanel.qml | 30 ++++++++++++++++++++++--
 qml/main.qml                             |  2 ++
 src/controller.cpp                       |  8 +++++++
 src/controller.h                         |  3 +++
 src/main.cpp                             | 15 ++++++++++--
 5 files changed, 54 insertions(+), 4 deletions(-)

diff --git a/imports/Spectral/Panel/RoomListPanel.qml b/imports/Spectral/Panel/RoomListPanel.qml
index f9ce1cf..d375470 100644
--- a/imports/Spectral/Panel/RoomListPanel.qml
+++ b/imports/Spectral/Panel/RoomListPanel.qml
@@ -432,10 +432,10 @@ Rectangle {
 
                 ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
 
-                padding: 16
+                padding: 32
 
                 ColumnLayout {
-                    width: main.width
+                    width: main.width - 64
                     spacing: 0
 
                     Switch {
@@ -465,6 +465,32 @@ Rectangle {
 
                         onCheckedChanged: MSettings.confirmOnExit = checked
                     }
+
+                    RowLayout {
+                        Layout.fillWidth: true
+
+                        Label {
+                            text: "DPI"
+                        }
+
+                        Slider {
+                            Layout.fillWidth: true
+
+                            value: controller.dpi()
+                            from: 100
+                            to: 300
+                            stepSize: 25
+                            snapMode: Slider.SnapAlways
+
+                            ToolTip {
+                                Material.foreground: "white"
+                                visible: parent.pressed
+                                text: parent.value
+                            }
+
+                            onMoved: controller.setDpi(value)
+                        }
+                    }
                 }
             }
         }
diff --git a/qml/main.qml b/qml/main.qml
index a6eb9d1..061f222 100644
--- a/qml/main.qml
+++ b/qml/main.qml
@@ -128,6 +128,8 @@ ApplicationWindow {
 
             ToolTip {
                 id: loginButtonTooltip
+
+                Material.foreground: "white"
             }
         }
 
diff --git a/src/controller.cpp b/src/controller.cpp
index 823081c..040854d 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -239,3 +239,11 @@ void Controller::postNotification(const QString& roomId, const QString& eventId,
   notificationsManager.postNotification(roomId, eventId, roomName, senderName,
                                         text, icon, iconPath);
 }
+
+int Controller::dpi() {
+  return SettingsGroup("Interface").value("dpi", 100).toInt();
+}
+
+void Controller::setDpi(int dpi) {
+  SettingsGroup("Interface").setValue("dpi", dpi);
+}
diff --git a/src/controller.h b/src/controller.h
index 3db7c64..46c526e 100644
--- a/src/controller.h
+++ b/src/controller.h
@@ -32,6 +32,9 @@ class Controller : public QObject {
 
   QVector<Connection*> connections() { return m_connections; }
 
+  Q_INVOKABLE int dpi();
+  Q_INVOKABLE void setDpi(int dpi);
+
   // All the non-Q_INVOKABLE functions.
   void addConnection(Connection* c);
   void dropConnection(Connection* c);
diff --git a/src/main.cpp b/src/main.cpp
index fe6cc3e..d76b24e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -23,10 +23,21 @@
 using namespace QMatrixClient;
 
 int main(int argc, char *argv[]) {
-#if defined(Q_OS_WIN)
-  QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#if defined(Q_OS_LINUX) || defined(Q_OS_WIN) || defined(Q_OS_FREEBSD)
+  if (qgetenv("QT_SCALE_FACTOR").size() == 0) {
+    QSettings settings("ENCOM", "Spectral");
+    float factor = settings.value("Interface/dpi", 100).toFloat() / 100;
+
+    qDebug() << "DPI:" << factor;
+
+    if (factor != -1)
+      qputenv("QT_SCALE_FACTOR", QString::number(factor).toUtf8());
+  }
 #endif
 
+  QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+  QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+
   QApplication app(argc, argv);
 
   app.setOrganizationName("ENCOM");