Scale UI component, used in launcher

src/blackgui/components/scalescreenfactor.cpp

@@ -0,0 +1,77 @@
+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "scalescreenfactor.h"
+#include "ui_scalescreenfactor.h"
+#include <QIntValidator>
+
+namespace BlackGui
+{
+    namespace Components
+    {
+        CScaleScreenFactor::CScaleScreenFactor(QWidget *parent) :
+            QFrame(parent),
+            ui(new Ui::CScaleScreenFactor)
+        {
+            ui->setupUi(this);
+            this->setMinMax(50, 150);
+
+            connect(ui->hs_Factor, &QSlider::valueChanged, this, &CScaleScreenFactor::onSliderChanged);
+            connect(ui->le_Factor, &QLineEdit::editingFinished, this, &CScaleScreenFactor::onEditFinished);
+        }
+
+        CScaleScreenFactor::~CScaleScreenFactor()
+        { }
+
+        void CScaleScreenFactor::setMinMax(int min, int max)
+        {
+            ui->hs_Factor->setMinimum(min);
+            ui->hs_Factor->setMaximum(max);
+            ui->le_Factor->setValidator(new QIntValidator(min, max, ui->le_Factor));
+
+            static const QString info("%1-%2");
+            ui->le_Factor->setToolTip(info.arg(min).arg(max));
+            ui->le_Factor->setPlaceholderText(info.arg(min).arg(max));
+            ui->hs_Factor->setToolTip(info.arg(min, max));
+
+            const int v = (min + max) / 2;
+            ui->hs_Factor->setValue(v);
+            ui->le_Factor->setText(QString::number(v));
+        }
+
+        qreal CScaleScreenFactor::getScaleFactor() const
+        {
+            return 0.01 * ui->hs_Factor->value();
+        }
+
+        QString CScaleScreenFactor::getScaleFactorAsString() const
+        {
+            const QString sf = QString::number(this->getScaleFactor(), 'f', 2);
+            return sf;
+        }
+
+        void CScaleScreenFactor::onSliderChanged(int value)
+        {
+            const QString v = QString::number(value);
+            if (ui->le_Factor->text() == v) { return; } // avoid signal roundtrips
+            ui->le_Factor->setText(v);
+        }
+
+        void CScaleScreenFactor::onEditFinished()
+        {
+            const QString v =  ui->le_Factor->text();
+            if (v.isEmpty()) { return; }
+            bool ok;
+            const int value = v.toInt(&ok);
+            if (!ok) { return; }
+            if (ui->hs_Factor->value() == value) { return; } // avoid signal roundtrips
+            ui->hs_Factor->setValue(value);
+        }
+    } // ns
+} // ns

src/blackgui/components/scalescreenfactor.h

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+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKGUI_COMPONENTS_SCALESCREENFACTOR_H
+#define BLACKGUI_COMPONENTS_SCALESCREENFACTOR_H
+
+#include "blackgui/blackguiexport.h"
+#include <QFrame>
+#include <QScopedPointer>
+
+namespace Ui { class CScaleScreenFactor; }
+namespace BlackGui
+{
+    namespace Components
+    {
+        /**
+         * UI to scale screen factor
+         */
+        class BLACKGUI_EXPORT CScaleScreenFactor : public QFrame
+        {
+            Q_OBJECT
+
+        public:
+            //! Constructor
+            explicit CScaleScreenFactor(QWidget *parent = nullptr);
+
+            //! Destructor
+            virtual ~CScaleScreenFactor();
+
+            //! Minimum/maximum values
+            void setMinMax(int min, int max);
+
+            //! Scale factor
+            qreal getScaleFactor() const;
+
+            //! Scale factor as string
+            QString getScaleFactorAsString() const;
+
+        private:
+            //! Slider value changed
+            void onSliderChanged(int value);
+
+            //! Line edit change
+            void onEditFinished();
+
+            QScopedPointer<Ui::CScaleScreenFactor> ui;
+        };
+    } // ns
+}// ns
+
+#endif // guard

src/blackgui/components/scalescreenfactor.ui

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+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>CScaleScreenFactor</class>
+ <widget class="QFrame" name="CScaleScreenFactor">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>165</width>
+    <height>24</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Scale screen factor</string>
+  </property>
+  <layout class="QHBoxLayout" name="hl_ScaleScreenFactor" stretch="0,1,5">
+   <property name="leftMargin">
+    <number>1</number>
+   </property>
+   <property name="topMargin">
+    <number>1</number>
+   </property>
+   <property name="rightMargin">
+    <number>1</number>
+   </property>
+   <property name="bottomMargin">
+    <number>1</number>
+   </property>
+   <item>
+    <widget class="QLabel" name="lbl_Scale">
+     <property name="text">
+      <string>Scale:</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLineEdit" name="le_Factor">
+     <property name="maxLength">
+      <number>5</number>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QSlider" name="hs_Factor">
+     <property name="minimum">
+      <number>50</number>
+     </property>
+     <property name="maximum">
+      <number>150</number>
+     </property>
+     <property name="singleStep">
+      <number>5</number>
+     </property>
+     <property name="value">
+      <number>100</number>
+     </property>
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>