From 9d8b67cdc43417fa0dbc7e4c144a6e79d303ebf6 Mon Sep 17 00:00:00 2001
From: slack <slack@codemaniacs.com>
Date: Tue, 17 Mar 2009 02:21:52 +0100
Subject: [PATCH] Added history browsing to qtboi disassembly window

---
 qtboi/QtBoiDisassemblyWindow.cc | 73 +++++++++++++++++++++++++++++++--
 qtboi/QtBoiDisassemblyWindow.h  | 18 +++++++-
 qtboi/QtBoiMainWindow.cc        |  2 -
 3 files changed, 86 insertions(+), 7 deletions(-)

diff --git a/qtboi/QtBoiDisassemblyWindow.cc b/qtboi/QtBoiDisassemblyWindow.cc
index a3d6978..1712479 100644
--- a/qtboi/QtBoiDisassemblyWindow.cc
+++ b/qtboi/QtBoiDisassemblyWindow.cc
@@ -1,15 +1,46 @@
 #include <string>
 #include <sstream>
 #include <iomanip>
+#include <cstdlib>
+
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <QFont>
 
 #include "QtBoiDisassemblyWindow.h"
 #include "../common/toString.h"
 
 QtBoiDisassemblyWindow::QtBoiDisassemblyWindow(QWidget *parent, GameBoy *gb, QHash<u32,QString> *tags)
-        :gb(gb), tags(tags)
+        :QWidget(parent), gb(gb), tags(tags), history(), historyPosition(-1)
 {
-        setFocusPolicy(Qt::NoFocus);
-        setMinimumSize(500,500);
+	setFocusPolicy(Qt::NoFocus);
+
+	browser = new QTextBrowser(this);
+        browser->setOpenLinks(false);
+	browser->setFont(QFont("courier"));
+        browser->setFocusPolicy(Qt::NoFocus);
+        browser->setMinimumSize(500,500);
+	connect(browser, SIGNAL(anchorClicked(const QUrl&)), this, SIGNAL(anchorClicked(const QUrl &)));
+
+
+	backButton    = new QPushButton("Back", this);
+	backButton->setEnabled(false);
+        backButton->setFocusPolicy(Qt::NoFocus);
+	forwardButton = new QPushButton("Forward", this);
+	forwardButton->setEnabled(false);
+        forwardButton->setFocusPolicy(Qt::NoFocus);
+	connect(backButton, SIGNAL(clicked()), this, SLOT(historyBack()));
+	connect(forwardButton, SIGNAL(clicked()), this, SLOT(historyForward()));
+	
+	QHBoxLayout *buttons = new QHBoxLayout();
+	buttons->addWidget(backButton);
+	buttons->addWidget(forwardButton);
+
+	QVBoxLayout *vbox = new QVBoxLayout;
+	vbox->addWidget(browser);
+	vbox->addLayout(buttons);
+
+	setLayout(vbox);
 }
 
 QtBoiDisassemblyWindow::~QtBoiDisassemblyWindow()
@@ -127,8 +158,30 @@ void QtBoiDisassemblyWindow::gotoAddress(u16 addr)
 
         str << "</table></body></html>";
 
-        setHtml(QString(str.str().c_str()));
+        browser->setHtml(QString(str.str().c_str()));
 	currentAddress=addr;
+
+	// If there are "forward" history elements
+	// - check if we are going forwards or backwards
+	// - else, delete forward history and insert the new address
+	if (historyPosition < history.size()-1 && history[historyPosition+1] == addr)
+		historyPosition++;
+	else if (historyPosition > 0 && history[historyPosition-1] == addr)
+		historyPosition--;
+	else
+	{
+		while (history.size() > historyPosition+1)
+			history.pop_back();
+		history.push_back(addr);
+		historyPosition++;
+	}
+
+	// enable/disable navigation buttons
+	if (historyPosition >= 1) backButton->setEnabled(true);
+	else backButton->setEnabled(false);
+
+	if (historyPosition >= 0 && historyPosition < history.size()-1) forwardButton->setEnabled(true);
+	else forwardButton->setEnabled(false);
 }
 
 void QtBoiDisassemblyWindow::gotoPC()
@@ -141,5 +194,17 @@ void QtBoiDisassemblyWindow::refresh()
         gotoAddress(currentAddress);
 }
 
+void QtBoiDisassemblyWindow::historyBack()
+{
+	if (historyPosition >= 1)
+		gotoAddress(history[historyPosition-1]);
+}
+
+void QtBoiDisassemblyWindow::historyForward()
+{
+	if (historyPosition < history.size()-1)
+		gotoAddress(history[historyPosition+1]);
+}
+
 
 
diff --git a/qtboi/QtBoiDisassemblyWindow.h b/qtboi/QtBoiDisassemblyWindow.h
index 5b4c180..375237b 100644
--- a/qtboi/QtBoiDisassemblyWindow.h
+++ b/qtboi/QtBoiDisassemblyWindow.h
@@ -2,11 +2,14 @@
 #define QTBOIDISASSEMBLYWINDOW_H
 
 #include <QTextBrowser>
+#include <QPushButton>
 #include <QString>
 #include <QHash>
+#include <QList>
+#include <QUrl>
 #include "../core/GameBoy.h"
 
-class QtBoiDisassemblyWindow: public QTextBrowser
+class QtBoiDisassemblyWindow: public QWidget
 {
         Q_OBJECT
 
@@ -18,13 +21,26 @@ class QtBoiDisassemblyWindow: public QTextBrowser
                 void gotoPC();
 		void refresh();
 
+	public slots:
+		void historyBack();
+		void historyForward();
+
+	signals:
+		void anchorClicked(const QUrl & link);
+
         private:
 		std::string insToHtml(const Instruction &ins);
 		std::string operandToHtml(const Instruction::Operand &ins);
 		std::string htmlLinkMem(u32 addr);
+
+		QTextBrowser *browser;
+		QPushButton *backButton, *forwardButton;
+
                 GameBoy *gb;
 		QString romTitle;
 		QHash<u32, QString> *tags;
+		QList<u32> history;
+		int historyPosition;
 
 		u16 currentAddress;
 
diff --git a/qtboi/QtBoiMainWindow.cc b/qtboi/QtBoiMainWindow.cc
index fd5c045..236ade9 100644
--- a/qtboi/QtBoiMainWindow.cc
+++ b/qtboi/QtBoiMainWindow.cc
@@ -103,8 +103,6 @@ QtBoiMainWindow::QtBoiMainWindow(QWidget *parent)
 	leftVBoxLayout->addWidget(status);
         
         disassembly = new QtBoiDisassemblyWindow(centralWindow, &emuThread->gb, &tags);
-        disassembly->setOpenLinks(false);
-	disassembly->setFont(QFont("courier"));
 
 	connect(disassembly, SIGNAL(anchorClicked(const QUrl&)), this, SLOT(onDisassemblyAnchorClicked(const QUrl&)));
         
-- 
2.34.1