Add spinner to hide uninitialized layout after login

include/MainWindow.h

@@ -22,8 +22,10 @@
 #include <QSharedPointer>
 
 #include "ChatPage.h"
+#include "CircularProgress.h"
 #include "LoginPage.h"
 #include "MatrixClient.h"
+#include "OverlayModal.h"
 #include "RegisterPage.h"
 #include "SlidingStackWidget.h"
 #include "WelcomePage.h"
@@ -41,7 +43,7 @@ public:
 	explicit MainWindow(QWidget *parent = 0);
 	~MainWindow();
 
-public slots:
+private slots:
 	// Show the welcome page in the main window.
 	void showWelcomePage();
 
@@ -54,6 +56,8 @@ public slots:
 	// Show the chat page and start communicating with the given access token.
 	void showChatPage(QString user_id, QString home_server, QString token);
 
+	void removeOverlayProgressBar();
+
 private:
 	// The UI component of the main window.
 	Ui::MainWindow *ui_;
@@ -73,6 +77,10 @@ private:
 	// The main chat area.
 	ChatPage *chat_page_;
 
+	// Used to hide undefined states between page transitions.
+	OverlayModal *progress_modal_;
+	CircularProgress *spinner_;
+
 	// Matrix Client API provider.
 	QSharedPointer<MatrixClient> client_;
 };

include/ui/CircularProgress.h

@@ -0,0 +1,114 @@
+#ifndef UI_CIRCULAR_PROGRESS_H
+#define UI_CIRCULAR_PROGRESS_H
+
+#include <QObject>
+#include <QProgressBar>
+
+#include "Theme.h"
+
+class CircularProgressDelegate;
+
+class CircularProgress : public QProgressBar
+{
+	Q_OBJECT
+
+	Q_PROPERTY(qreal lineWidth WRITE setLineWidth READ lineWidth)
+	Q_PROPERTY(qreal size WRITE setSize READ size)
+	Q_PROPERTY(QColor color WRITE setColor READ color)
+
+public:
+	explicit CircularProgress(QWidget *parent = nullptr);
+	~CircularProgress();
+
+	void setProgressType(ui::ProgressType type);
+	void setLineWidth(qreal width);
+	void setSize(int size);
+	void setColor(const QColor &color);
+
+	ui::ProgressType progressType() const;
+	qreal lineWidth() const;
+	int size() const;
+	QColor color() const;
+
+	QSize sizeHint() const override;
+
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
+private:
+	CircularProgressDelegate *delegate_;
+
+	ui::ProgressType progress_type_;
+
+	QColor color_;
+
+	// Circle width.
+	qreal width_;
+
+	// Circle radius.
+	int size_;
+};
+
+class CircularProgressDelegate : public QObject
+{
+	Q_OBJECT
+
+	Q_PROPERTY(qreal dashOffset WRITE setDashOffset READ dashOffset)
+	Q_PROPERTY(qreal dashLength WRITE setDashLength READ dashLength)
+	Q_PROPERTY(int angle WRITE setAngle READ angle)
+
+public:
+	explicit CircularProgressDelegate(CircularProgress *parent);
+	~CircularProgressDelegate();
+
+	inline void setDashOffset(qreal offset);
+	inline void setDashLength(qreal length);
+	inline void setAngle(int angle);
+
+	inline qreal dashOffset() const;
+	inline qreal dashLength() const;
+	inline int angle() const;
+
+private:
+	CircularProgress *const progress_;
+
+	qreal dash_offset_;
+	qreal dash_length_;
+
+	int angle_;
+};
+
+inline void CircularProgressDelegate::setDashOffset(qreal offset)
+{
+	dash_offset_ = offset;
+	progress_->update();
+}
+
+inline void CircularProgressDelegate::setDashLength(qreal length)
+{
+	dash_length_ = length;
+	progress_->update();
+}
+
+inline void CircularProgressDelegate::setAngle(int angle)
+{
+	angle_ = angle;
+	progress_->update();
+}
+
+inline qreal CircularProgressDelegate::dashOffset() const
+{
+	return dash_offset_;
+}
+
+inline qreal CircularProgressDelegate::dashLength() const
+{
+	return dash_length_;
+}
+
+inline int CircularProgressDelegate::angle() const
+{
+	return angle_;
+}
+
+#endif  // UI_CIRCULAR_PROGRESS_H

include/ui/OverlayModal.h

@@ -0,0 +1,60 @@
+/*
+ * nheko Copyright (C) 2017  Konstantinos Sideris <siderisk@auth.gr>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef UI_OVERLAY_MODAL_H
+#define UI_OVERLAY_MODAL_H
+
+#include <QGraphicsOpacityEffect>
+#include <QPaintEvent>
+#include <QPropertyAnimation>
+
+#include "OverlayWidget.h"
+
+class OverlayModal : public OverlayWidget
+{
+public:
+	explicit OverlayModal(QWidget *parent, QWidget *content);
+
+	void fadeIn();
+	void fadeOut();
+
+public:
+	inline void setDuration(int duration);
+	inline void setColor(QColor color);
+
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
+private:
+	int duration_;
+	QColor color_;
+
+	QGraphicsOpacityEffect *opacity_;
+	QPropertyAnimation *animation_;
+};
+
+inline void OverlayModal::setDuration(int duration)
+{
+	duration_ = duration;
+}
+
+inline void OverlayModal::setColor(QColor color)
+{
+	color_ = color;
+}
+
+#endif  // UI_OVERLAY_MODAL_H

include/ui/OverlayWidget.h

@@ -2,7 +2,6 @@
 #define UI_OVERLAY_WIDGET_H
 
 #include <QEvent>
-#include <QObject>
 #include <QWidget>
 
 class OverlayWidget : public QWidget
@@ -10,8 +9,7 @@ class OverlayWidget : public QWidget
 	Q_OBJECT
 
 public:
-	explicit OverlayWidget(QWidget *parent = 0);
-	~OverlayWidget();
+	explicit OverlayWidget(QWidget *parent = nullptr);
 
 protected:
 	bool event(QEvent *event) override;