Qt/Debugger: Implement patch instruction preview

Source/Core/DolphinQt/CMakeLists.txt

@@ -84,6 +84,7 @@ add_executable(dolphin-emu
   Debugger/MemoryViewWidget.cpp
   Debugger/MemoryWidget.cpp
   Debugger/NewBreakpointDialog.cpp
+  Debugger/PatchInstructionDialog.cpp
   Debugger/RegisterColumn.cpp
   Debugger/RegisterWidget.cpp
   Debugger/WatchWidget.cpp

Source/Core/DolphinQt/Debugger/CodeViewWidget.cpp

@@ -26,6 +26,7 @@
 #include "Core/PowerPC/PPCAnalyst.h"
 #include "Core/PowerPC/PPCSymbolDB.h"
 #include "Core/PowerPC/PowerPC.h"
+#include "DolphinQt/Debugger/PatchInstructionDialog.h"
 #include "DolphinQt/Resources.h"
 #include "DolphinQt/Settings.h"
 
@@ -463,17 +464,12 @@ void CodeViewWidget::OnReplaceInstruction()
   if (!read_result.valid)
     return;
 
-  bool good;
-  QString name = QInputDialog::getText(
-      this, tr("Change instruction"), tr("New instruction:"), QLineEdit::Normal,
-      QStringLiteral("%1").arg(read_result.hex, 8, 16, QLatin1Char('0')), &good);
+  PatchInstructionDialog dialog(this, addr, PowerPC::debug_interface.ReadInstruction(addr));
 
-  u32 code = name.toUInt(&good, 16);
-
-  if (good)
+  if (dialog.exec() == QDialog::Accepted)
   {
     PowerPC::debug_interface.UnsetPatch(addr);
-    PowerPC::debug_interface.SetPatch(addr, code);
+    PowerPC::debug_interface.SetPatch(addr, dialog.GetCode());
     Update();
   }
 }

Source/Core/DolphinQt/Debugger/PatchInstructionDialog.cpp

@@ -0,0 +1,67 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "DolphinQt/Debugger/PatchInstructionDialog.h"
+
+#include <QDialogButtonBox>
+#include <QLabel>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QVBoxLayout>
+
+#include "Common/GekkoDisassembler.h"
+
+PatchInstructionDialog::PatchInstructionDialog(QWidget* parent, u32 address, u32 value)
+    : QDialog(parent), m_address(address)
+{
+  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
+  setWindowModality(Qt::WindowModal);
+  setWindowTitle(tr("Instruction"));
+
+  CreateWidgets();
+  ConnectWidgets();
+
+  m_input_edit->setText(QStringLiteral("%1").arg(value, 8, 16, QLatin1Char('0')));
+}
+
+void PatchInstructionDialog::CreateWidgets()
+{
+  auto* layout = new QVBoxLayout;
+
+  m_input_edit = new QLineEdit;
+  m_preview_label = new QLabel;
+  m_button_box = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
+
+  layout->addWidget(new QLabel(tr("New instruction:")));
+  layout->addWidget(m_input_edit);
+  layout->addWidget(m_preview_label);
+  layout->addWidget(m_button_box);
+
+  setLayout(layout);
+}
+
+void PatchInstructionDialog::ConnectWidgets()
+{
+  connect(m_button_box, &QDialogButtonBox::accepted, this, &QDialog::accept);
+  connect(m_button_box, &QDialogButtonBox::rejected, this, &QDialog::reject);
+
+  connect(m_input_edit, &QLineEdit::textChanged, this, &PatchInstructionDialog::OnEditChanged);
+}
+
+void PatchInstructionDialog::OnEditChanged()
+{
+  bool good;
+  m_code = m_input_edit->text().toUInt(&good, 16);
+
+  m_button_box->button(QDialogButtonBox::Ok)->setEnabled(good);
+
+  m_preview_label->setText(
+      tr("Instruction: %1")
+          .arg(QString::fromStdString(Common::GekkoDisassembler::Disassemble(m_code, m_address))));
+}
+
+u32 PatchInstructionDialog::GetCode() const
+{
+  return m_code;
+}

Source/Core/DolphinQt/Debugger/PatchInstructionDialog.h

@@ -0,0 +1,35 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QDialog>
+
+#include "Common/CommonTypes.h"
+
+class QDialogButtonBox;
+class QLabel;
+class QLineEdit;
+
+class PatchInstructionDialog : public QDialog
+{
+  Q_OBJECT
+public:
+  explicit PatchInstructionDialog(QWidget* parent, u32 address, u32 value);
+
+  u32 GetCode() const;
+
+private:
+  void CreateWidgets();
+  void ConnectWidgets();
+
+  void OnEditChanged();
+
+  u32 m_code;
+  u32 m_address;
+
+  QLineEdit* m_input_edit;
+  QLabel* m_preview_label;
+  QDialogButtonBox* m_button_box;
+};

Source/Core/DolphinQt/DolphinQt.vcxproj

@@ -126,6 +126,7 @@
     <QtMoc Include="Debugger\MemoryWidget.h" />
     <QtMoc Include="Debugger\MemoryViewWidget.h" />
     <QtMoc Include="Debugger\NewBreakpointDialog.h" />
+    <QtMoc Include="Debugger\PatchInstructionDialog.h" />
     <QtMoc Include="Debugger\RegisterWidget.h" />
     <QtMoc Include="Debugger\WatchWidget.h" />
     <QtMoc Include="GCMemcardManager.h" />
@@ -255,6 +256,7 @@
     <ClCompile Include="$(QtMocOutPrefix)NewPatchDialog.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PadMappingDialog.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PatchesWidget.cpp" />
+    <ClCompile Include="$(QtMocOutPrefix)PatchInstructionDialog.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PathPane.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PostProcessingConfigWindow.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PropertiesDialog.cpp" />
@@ -351,6 +353,7 @@
     <ClCompile Include="TAS\IRWidget.cpp" />
     <ClCompile Include="Debugger\BreakpointWidget.cpp" />
     <ClCompile Include="Debugger\NewBreakpointDialog.cpp" />
+    <ClCompile Include="Debugger\PatchInstructionDialog.cpp" />
     <ClCompile Include="Debugger\RegisterColumn.cpp" />
     <ClCompile Include="Debugger\RegisterWidget.cpp" />
     <ClCompile Include="Debugger\WatchWidget.cpp" />