From 148a706771f872a7afae0942039d3a36c1793ec6 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Sun, 16 May 2021 03:23:26 +1000
Subject: [PATCH] Qt: Add CollapsibleWidget

---
 src/duckstation-qt/CMakeLists.txt             |  2 +
 src/duckstation-qt/collapsiblewidget.cpp      | 56 +++++++++++++++++++
 src/duckstation-qt/collapsiblewidget.h        | 27 +++++++++
 src/duckstation-qt/duckstation-qt.vcxproj     |  5 +-
 .../duckstation-qt.vcxproj.filters            |  6 +-
 5 files changed, 93 insertions(+), 3 deletions(-)
 create mode 100644 src/duckstation-qt/collapsiblewidget.cpp
 create mode 100644 src/duckstation-qt/collapsiblewidget.h

diff --git a/src/duckstation-qt/CMakeLists.txt b/src/duckstation-qt/CMakeLists.txt
index 33434ae31..88dbc99f1 100644
--- a/src/duckstation-qt/CMakeLists.txt
+++ b/src/duckstation-qt/CMakeLists.txt
@@ -24,6 +24,8 @@ set(SRCS
   cheatcodeeditordialog.cpp
   cheatcodeeditordialog.h
   cheatcodeeditordialog.ui
+  collapsiblewidget.cpp
+  collapsiblewidget.h
   consolesettingswidget.cpp
   consolesettingswidget.h
   consolesettingswidget.ui
diff --git a/src/duckstation-qt/collapsiblewidget.cpp b/src/duckstation-qt/collapsiblewidget.cpp
new file mode 100644
index 000000000..c0b680841
--- /dev/null
+++ b/src/duckstation-qt/collapsiblewidget.cpp
@@ -0,0 +1,56 @@
+#include <QtCore/QPropertyAnimation>
+
+#include "collapsiblewidget.h"
+
+CollapsibleWidget::CollapsibleWidget(const QString& title, const int animationDuration, QWidget* parent)
+  : QWidget(parent), animationDuration(animationDuration)
+{
+  toggleButton.setStyleSheet("QToolButton { border: none; }");
+  toggleButton.setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
+  toggleButton.setArrowType(Qt::ArrowType::RightArrow);
+  toggleButton.setText(title);
+  toggleButton.setCheckable(true);
+  toggleButton.setChecked(false);
+
+  contentArea.setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+  // start out collapsed
+  contentArea.setMaximumHeight(0);
+  contentArea.setMinimumHeight(0);
+
+  // let the entire widget grow and shrink with its content
+  toggleAnimation.addAnimation(new QPropertyAnimation(this, "minimumHeight"));
+  toggleAnimation.addAnimation(new QPropertyAnimation(this, "maximumHeight"));
+  toggleAnimation.addAnimation(new QPropertyAnimation(&contentArea, "maximumHeight"));
+
+  // don't waste space
+  mainLayout.setContentsMargins(0, 0, 0, 0);
+  mainLayout.addWidget(&toggleButton);
+  mainLayout.addWidget(&contentArea);
+  setLayout(&mainLayout);
+  QObject::connect(&toggleButton, &QToolButton::clicked, [this](const bool checked) {
+    toggleButton.setArrowType(checked ? Qt::ArrowType::DownArrow : Qt::ArrowType::RightArrow);
+    toggleAnimation.setDirection(checked ? QAbstractAnimation::Forward : QAbstractAnimation::Backward);
+    toggleAnimation.start();
+  });
+}
+
+void CollapsibleWidget::setContentLayout(QLayout* contentLayout)
+{
+  delete contentArea.layout();
+  contentArea.setLayout(contentLayout);
+  const auto collapsedHeight = sizeHint().height() - contentArea.maximumHeight();
+  auto contentHeight = contentLayout->sizeHint().height();
+  for (int i = 0; i < toggleAnimation.animationCount() - 1; ++i)
+  {
+    QPropertyAnimation* spoilerAnimation = static_cast<QPropertyAnimation*>(toggleAnimation.animationAt(i));
+    spoilerAnimation->setDuration(animationDuration);
+    spoilerAnimation->setStartValue(collapsedHeight);
+    spoilerAnimation->setEndValue(collapsedHeight + contentHeight);
+  }
+  QPropertyAnimation* contentAnimation =
+    static_cast<QPropertyAnimation*>(toggleAnimation.animationAt(toggleAnimation.animationCount() - 1));
+  contentAnimation->setDuration(animationDuration);
+  contentAnimation->setStartValue(0);
+  contentAnimation->setEndValue(contentHeight);
+}
\ No newline at end of file
diff --git a/src/duckstation-qt/collapsiblewidget.h b/src/duckstation-qt/collapsiblewidget.h
new file mode 100644
index 000000000..4af041efc
--- /dev/null
+++ b/src/duckstation-qt/collapsiblewidget.h
@@ -0,0 +1,27 @@
+// https://stackoverflow.com/questions/32476006/how-to-make-an-expandable-collapsable-section-widget-in-qt
+
+#pragma once
+
+#include <QtCore/QParallelAnimationGroup>
+#include <QtWidgets/QScrollArea>
+#include <QtWidgets/QToolButton>
+#include <QtWidgets/QVBoxLayout>
+#include <QtWidgets/QWidget>
+
+class CollapsibleWidget : public QWidget
+{
+  Q_OBJECT
+private:
+  QVBoxLayout mainLayout;
+  QToolButton toggleButton;
+  QParallelAnimationGroup toggleAnimation;
+  QScrollArea contentArea;
+  int animationDuration{300};
+
+public:
+  explicit CollapsibleWidget(const QString& title = "", const int animationDuration = 300, QWidget* parent = 0);
+
+  QScrollArea* getScrollArea() { return &contentArea; }
+
+  void setContentLayout(QLayout* contentLayout);
+};
diff --git a/src/duckstation-qt/duckstation-qt.vcxproj b/src/duckstation-qt/duckstation-qt.vcxproj
index 789e008d1..81763020d 100644
--- a/src/duckstation-qt/duckstation-qt.vcxproj
+++ b/src/duckstation-qt/duckstation-qt.vcxproj
@@ -60,6 +60,7 @@
     <ClCompile Include="biossettingswidget.cpp" />
     <ClCompile Include="cheatmanagerdialog.cpp" />
     <ClCompile Include="cheatcodeeditordialog.cpp" />
+    <ClCompile Include="collapsiblewidget.cpp" />
     <ClCompile Include="consolesettingswidget.cpp" />
     <ClCompile Include="emulationsettingswidget.cpp" />
     <ClCompile Include="debuggermodels.cpp" />
@@ -118,6 +119,7 @@
     <QtMoc Include="debuggerwindow.h" />
     <QtMoc Include="achievementsettingswidget.h" />
     <QtMoc Include="achievementlogindialog.h" />
+    <QtMoc Include="collapsiblewidget.h" />
     <ClInclude Include="inputbindingmonitor.h" />
     <QtMoc Include="memoryviewwidget.h" />
     <ClInclude Include="resource.h" />
@@ -228,6 +230,7 @@
     <ClCompile Include="$(IntDir)moc_biossettingswidget.cpp" />
     <ClCompile Include="$(IntDir)moc_cheatmanagerdialog.cpp" />
     <ClCompile Include="$(IntDir)moc_cheatcodeeditordialog.cpp" />
+    <ClCompile Include="$(IntDir)moc_collapsiblewidget.cpp" />
     <ClCompile Include="$(IntDir)moc_consolesettingswidget.cpp" />
     <ClCompile Include="$(IntDir)moc_controllersettingswidget.cpp" />
     <ClCompile Include="$(IntDir)moc_emulationsettingswidget.cpp" />
@@ -287,7 +290,7 @@
     <QtTs Include="translations\duckstation-qt_de.ts">
       <FileType>Document</FileType>
     </QtTs>
-	<QtTs Include="translations\duckstation-qt_en.ts">
+    <QtTs Include="translations\duckstation-qt_en.ts">
       <FileType>Document</FileType>
     </QtTs>
     <QtTs Include="translations\duckstation-qt_es.ts">
diff --git a/src/duckstation-qt/duckstation-qt.vcxproj.filters b/src/duckstation-qt/duckstation-qt.vcxproj.filters
index b374176ce..44508bf61 100644
--- a/src/duckstation-qt/duckstation-qt.vcxproj.filters
+++ b/src/duckstation-qt/duckstation-qt.vcxproj.filters
@@ -79,14 +79,16 @@
     <ClCompile Include="$(IntDir)moc_emulationsettingswidget.cpp" />
     <ClCompile Include="achievementsettingswidget.cpp" />
     <ClCompile Include="$(IntDir)moc_achievementsettingswidget.cpp" />
-    <ClCompile Include="$(IntDir)moc_achievementslogindialog.cpp" />
     <ClCompile Include="achievementlogindialog.cpp" />
+    <ClCompile Include="$(IntDir)moc_achievementlogindialog.cpp" />
+    <ClCompile Include="collapsiblewidget.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="qtutils.h" />
     <ClInclude Include="settingwidgetbinder.h" />
     <ClInclude Include="resource.h" />
     <ClInclude Include="inputbindingmonitor.h" />
+    <ClInclude Include="collapsiblewidget.h" />
   </ItemGroup>
   <ItemGroup>
     <Filter Include="resources">
@@ -181,7 +183,7 @@
     <QtTs Include="translations\duckstation-qt_de.ts">
       <Filter>translations</Filter>
     </QtTs>
-	<QtTs Include="translations\duckstation-qt_en.ts">
+    <QtTs Include="translations\duckstation-qt_en.ts">
       <Filter>translations</Filter>
     </QtTs>
     <QtTs Include="translations\duckstation-qt_es.ts">