Huge Java detection refactor, version dialogs on first run (no JavaPath set) and "auto detect" button

gui/mainwindow.cpp

@@ -53,6 +53,7 @@
 #include "logic/lists/MinecraftVersionList.h"
 #include "logic/lists/LwjglVersionList.h"
 #include "logic/lists/IconList.h"
+#include "logic/lists/JavaVersionList.h"
 
 #include "logic/net/LoginTask.h"
 #include "logic/BaseInstance.h"
@@ -60,6 +61,7 @@
 #include "logic/MinecraftProcess.h"
 #include "logic/OneSixAssets.h"
 #include "logic/OneSixUpdate.h"
+#include "logic/JavaUtils.h"
 
 #include "logic/LegacyInstance.h"
 
@@ -701,3 +703,31 @@ void MainWindow::instanceEnded()
 	this->show();
 	ui->actionLaunchInstance->setEnabled(m_selectedInstance);
 }
+
+void MainWindow::checkSetDefaultJava()
+{
+	QString currentJavaPath = MMC->settings()->get("JavaPath").toString();
+	if(currentJavaPath.isEmpty())
+	{
+		QLOG_DEBUG() << "Java path not set, showing Java selection dialog...";
+
+		JavaVersionPtr java;
+
+		VersionSelectDialog vselect(MMC->javalist().get(), tr("First run: select a Java version"), this, false);
+		vselect.setResizeOn(2);
+		vselect.exec();
+
+		if (!vselect.selectedVersion())
+		{
+			QMessageBox::warning(
+						this, tr("Invalid version selected"), tr("You didn't select a valid Java version, so MultiMC will select the default. "
+																 "You can change this in the settings dialog."));
+
+			JavaUtils ju;
+			java = ju.GetDefaultJava();
+		}
+
+		java = std::dynamic_pointer_cast<JavaVersion>(vselect.selectedVersion());
+		MMC->settings()->set("JavaPath", java->path);
+	}
+}

gui/mainwindow.h

@@ -49,6 +49,8 @@ public:
 	// Browser Dialog
 	void openWebPage(QUrl url);
 
+	void checkSetDefaultJava();
+
 private slots:
 	void onCatToggled(bool);
 
@@ -128,7 +130,6 @@ protected:
 	void setCatBackground(bool enabled);
 
 private:
-
 	Ui::MainWindow *ui;
 	KCategoryDrawer *drawer;
 	KCategorizedView *view;

gui/settingsdialog.cpp

@@ -17,6 +17,8 @@
 #include "settingsdialog.h"
 #include "ui_settingsdialog.h"
 #include "logic/JavaUtils.h"
+#include "gui/versionselectdialog.h"
+#include "logic/lists/JavaVersionList.h"
 
 #include <settingsobject.h>
 #include <QFileDialog>
@@ -184,10 +186,17 @@ void SettingsDialog::loadSettings(SettingsObject *s)
 
 void SettingsDialog::on_pushButton_clicked()
 {
-	JavaUtils jut;
-	auto javas = jut.FindJavaPaths();
+	JavaVersionPtr java;
 
-	ui->javaPathTextBox->setText(std::get<JI_PATH>(javas.at(0)));
+	VersionSelectDialog vselect(MMC->javalist().get(), tr("Select a Java version"), this, true);
+	vselect.setResizeOn(2);
+	vselect.exec();
+
+	if (vselect.result() == QDialog::Accepted && vselect.selectedVersion())
+	{
+		java = std::dynamic_pointer_cast<JavaVersion>(vselect.selectedVersion());
+		ui->javaPathTextBox->setText(java->path);
+	}
 }
 
 void SettingsDialog::on_btnBrowse_clicked()

gui/settingsdialog.ui

@@ -423,7 +423,7 @@
              </sizepolicy>
             </property>
             <property name="text">
-             <string>Auto-detect</string>
+             <string>Auto-detect...</string>
             </property>
            </widget>
           </item>

gui/versionselectdialog.cpp

@@ -26,7 +26,7 @@
 #include <logic/lists/BaseVersionList.h>
 #include <logic/tasks/Task.h>
 
-VersionSelectDialog::VersionSelectDialog(BaseVersionList *vlist, QString title, QWidget *parent)
+VersionSelectDialog::VersionSelectDialog(BaseVersionList *vlist, QString title, QWidget *parent, bool cancelable)
 	: QDialog(parent), ui(new Ui::VersionSelectDialog)
 {
 	ui->setupUi(this);
@@ -40,7 +40,12 @@ VersionSelectDialog::VersionSelectDialog(BaseVersionList *vlist, QString title,
 
 	ui->listView->setModel(m_proxyModel);
 	ui->listView->header()->setSectionResizeMode(QHeaderView::ResizeToContents);
-	ui->listView->header()->setSectionResizeMode(0, QHeaderView::Stretch);
+	ui->listView->header()->setSectionResizeMode(resizeOnColumn, QHeaderView::Stretch);
+
+	if(!cancelable)
+	{
+		ui->buttonBox->button(QDialogButtonBox::Cancel)->setEnabled(false);
+	}
 }
 
 VersionSelectDialog::~VersionSelectDialog()
@@ -48,6 +53,13 @@ VersionSelectDialog::~VersionSelectDialog()
 	delete ui;
 }
 
+void VersionSelectDialog::setResizeOn(int column)
+{
+	ui->listView->header()->setSectionResizeMode(resizeOnColumn, QHeaderView::ResizeToContents);
+	resizeOnColumn = column;
+	ui->listView->header()->setSectionResizeMode(resizeOnColumn, QHeaderView::Stretch);
+}
+
 int VersionSelectDialog::exec()
 {
 	QDialog::open();

gui/versionselectdialog.h

@@ -33,7 +33,7 @@ class VersionSelectDialog : public QDialog
 	Q_OBJECT
 	
 public:
-	explicit VersionSelectDialog(BaseVersionList *vlist, QString title, QWidget *parent = 0);
+	explicit VersionSelectDialog(BaseVersionList *vlist, QString title, QWidget *parent = 0, bool cancelable = true);
 	~VersionSelectDialog();
 	
 	virtual int exec();
@@ -44,6 +44,7 @@ public:
 	BaseVersionPtr selectedVersion() const;
 	
 	void setFilter(int column, QString filter);
+	void setResizeOn(int column);
 	
 private slots:
 	void on_refreshButton_clicked();
@@ -53,6 +54,8 @@ private:
 	BaseVersionList *m_vlist;
 	
 	QSortFilterProxyModel *m_proxyModel;
+
+	int resizeOnColumn = 0;
 };
 
 #endif // VERSIONSELECTDIALOG_H