Merge pull request #3 from presstab/themes

Add hot swapping themes

src/qt/bitcoingui.cpp

@@ -57,6 +57,10 @@
 #include <QUrl>
 #include <QMimeData>
 #include <QStyle>
+#include <QFile>
+#include <QTextStream>
+#include <QSignalMapper>
+#include <QSettings>
 
 #include <iostream>
 
@@ -92,6 +96,11 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     // Accept D&D of URIs
     setAcceptDrops(true);
 
+    /* zeewolf: Hot swappable wallet themes */
+    // Discover themes
+    listThemes(themesList);
+    /* zeewolf: Hot swappable wallet themes */
+
     // Create actions for the toolbar, menu bar and tray/dock icon
     createActions();
 
@@ -314,6 +323,25 @@ void BitcoinGUI::createActions()
     connect(lockWalletAction, SIGNAL(triggered()), this, SLOT(lockWallet()));
     connect(signMessageAction, SIGNAL(triggered()), this, SLOT(gotoSignMessageTab()));
     connect(verifyMessageAction, SIGNAL(triggered()), this, SLOT(gotoVerifyMessageTab()));
+
+    /* zeewolf: Hot swappable wallet themes */
+    if (themesList.count()>0)
+    {
+        QSignalMapper* signalMapper = new QSignalMapper (this) ;
+
+        // Add custom themes (themes directory)
+        for( int i=0; i < themesList.count(); i++ )
+        {
+            QString theme=themesList[i];
+            customActions[i] = new QAction(QIcon(":/icons/options"), theme, this);
+            customActions[i]->setToolTip(QString("Switch to " + theme + " theme"));
+            customActions[i]->setStatusTip(QString("Switch to " + theme + " theme"));
+            signalMapper->setMapping(customActions[i], theme);
+            connect(customActions[i], SIGNAL(triggered()), signalMapper, SLOT (map()));
+        }
+        connect(signalMapper, SIGNAL(mapped(QString)), this, SLOT(changeTheme(QString)));
+    }
+    /* zeewolf: Hot swappable wallet themes */
 }
 
 void BitcoinGUI::createMenuBar()
@@ -333,6 +361,16 @@ void BitcoinGUI::createMenuBar()
     file->addSeparator();
     file->addAction(quitAction);
 
+    /* zeewolf: Hot swappable wallet themes */
+    if (themesList.count()>0)
+    {
+        QMenu *themes = appMenuBar->addMenu(tr("&Themes"));
+        for (int i = 0; i < themesList.count(); i++) {
+            themes->addAction(customActions[i]);
+        }
+    }
+    /* zeewolf: Hot swappable wallet themes */
+
     QMenu *settings = appMenuBar->addMenu(tr("&Settings"));
     settings->addAction(encryptWalletAction);
     settings->addAction(changePassphraseAction);
@@ -352,7 +390,7 @@ static QWidget* makeToolBarSpacer()
 {
     QWidget* spacer = new QWidget();
     spacer->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
-    spacer->setStyleSheet(fUseRedTheme ? "QWidget { background: rgb(37,0,0); }" : "QWidget { background: none; }");
+    //spacer->setStyleSheet(fUseRedTheme ? "QWidget { background: rgb(37,0,0); }" : "QWidget { background: none; }");
     return spacer;
 }
 
@@ -1042,3 +1080,153 @@ void BitcoinGUI::detectShutdown()
     if (ShutdownRequested())
         QMetaObject::invokeMethod(QCoreApplication::instance(), "quit", Qt::QueuedConnection);
 }
+
+/* zeewolf: Hot swappable wallet themes */
+void BitcoinGUI::changeTheme(QString theme)
+{
+    // load Default theme first (if present) to apply default styles
+    loadTheme("Default");
+
+    if (theme != "Default") {
+        loadTheme(theme);
+    }
+}
+
+void BitcoinGUI::loadTheme(QString theme)
+{
+    // template variables : key => value
+    QMap<QString, QString> variables;
+
+    // path to selected theme dir - for simpler use, just use $theme-dir in qss : url($theme-dir/image.png)
+    QString themeDir = themesDir + "/" + theme;
+
+    // if theme selected
+    if (theme != "") {
+        QFile qss(themeDir + "/styles.qss");
+        // open qss
+        if (qss.open(QFile::ReadOnly))
+        {
+            // read stylesheet
+            QString styleSheet = QString(qss.readAll());
+            QTextStream in(&qss);
+            // rewind
+            in.seek(0);
+            bool readingVariables = false;
+
+            // seek for variables
+            while(!in.atEnd()) {
+                QString line = in.readLine();
+                // variables starts here
+                if (line == "/** [VARS]") {
+                    readingVariables = true;
+                }
+                // variables end here
+                if (line == "[/VARS] */") {
+                    break;
+                }
+                // if we're reading variables - store them in a map
+                if (readingVariables == true) {
+                    // skip empty lines
+                    if (line.length()>3 && line.contains('=')) {
+                        QStringList fields = line.split("=");
+                        QString var = fields.at(0).trimmed();
+                        QString value = fields.at(1).trimmed();
+                        variables[var] = value;
+                    }
+                }
+            }
+
+            // replace path to themes dir
+            styleSheet.replace("$theme-dir", themeDir);
+            styleSheet.replace("$themes-dir", themesDir);
+
+            QMapIterator<QString, QString> variable(variables);
+            variable.toBack();
+            // iterate backwards to prevent overwriting variables
+            while (variable.hasPrevious()) {
+                variable.previous();
+                // replace variables
+                styleSheet.replace(variable.key(), variable.value());
+            }
+
+            qss.close();
+
+            // Apply the result qss file to Qt
+
+            /*if (styleSheet.contains("$", Qt::CaseInsensitive)) {
+                QRegExp rx("(\\$[-\\w]+)");
+                rx.indexIn(styleSheet);
+                QString captured = rx.cap(1);
+                QMessageBox::warning(this, "Theme syntax error", "You have used variable that is not declared " + captured + ". Theme will not be applied.");
+            } else {*/
+                qApp->setStyleSheet(styleSheet);
+            /*}*/
+        }
+    } else {
+        // If not theme name given - clear styles
+        qApp->setStyleSheet(QString(""));
+    }
+
+    // set selected theme and store it in registry
+    selectedTheme = theme;
+    QSettings settings;
+    settings.setValue("Template", selectedTheme);
+}
+
+void BitcoinGUI::listThemes(QStringList& themes)
+{
+    QDir currentDir(qApp->applicationDirPath());
+    printf("directory %s \n", currentDir.absolutePath().toStdString().c_str());
+    // try app dir
+    if (currentDir.cd("themes")) {
+    printf("directory found 1\n");
+    } else if (currentDir.cd("src/qt/res/themes")) {
+        printf("directory found 2\n");
+    } else if (currentDir.cd("../src/qt/res/themes")) {
+        printf("directory found 3\n");
+    } else {
+        printf("directory not found \n");
+        return;
+    }
+    themesDir = currentDir.path();
+    currentDir.setFilter(QDir::Dirs);
+    QStringList entries = currentDir.entryList();
+    printf("entry count = %d\n", entries.size());
+    for( QStringList::ConstIterator entry=entries.begin(); entry!=entries.end(); ++entry )
+    {
+        QString themeName=*entry;
+        if(themeName != tr(".") && themeName != tr(".."))
+        {
+            themes.append(themeName);
+        }
+    }
+
+    // get selected theme from registry (if any)
+    QSettings settings;
+    selectedTheme = settings.value("Template").toString();
+    // or use default theme
+    if (selectedTheme=="") {
+        selectedTheme = "Default";
+    }
+    // load it!
+    loadTheme(selectedTheme);
+}
+
+void BitcoinGUI::keyPressEvent(QKeyEvent * e)
+{
+    switch (e->type())
+     {
+       case QEvent::KeyPress:
+         // $ key
+         if (e->key() == 36) {
+             // dev feature: key reloads selected theme
+             loadTheme(selectedTheme);
+         }
+         break;
+       default:
+         break;
+     }
+
+}
+
+/* /zeewolf: Hot swappable wallet themes */

src/qt/bitcoingui.h

@@ -115,6 +115,14 @@ class BitcoinGUI : public QMainWindow
     /** Create system tray (notification) icon */
     void createTrayIcon();
 
+    /* Themes support */
+    QString selectedTheme;
+    QStringList themesList;
+    // Path to directory where all themes are (usable for some common images?...)
+    QString themesDir;
+    QAction *customActions[100];
+    /* Themes support */
+
 public slots:
     /** Set number of connections shown in the UI */
     void setNumConnections(int count);
@@ -196,6 +204,12 @@ private slots:
 
     /** called by a timer to check if fRequestShutdown has been set **/
     void detectShutdown();
+
+    /** Load external QSS stylesheet */
+    void changeTheme(QString theme);
+    void loadTheme(QString theme);
+    void listThemes(QStringList& themes);
+    void keyPressEvent(QKeyEvent * e);
 };
 
 #endif // BITCOINGUI_H

src/qt/forms/overviewpage.ui

@@ -32,7 +32,7 @@
     </widget>
    </item>
    <item>
-    <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,1">
+    <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,0">
      <item>
       <layout class="QVBoxLayout" name="verticalLayout_2">
        <item>
@@ -265,6 +265,25 @@
          </layout>
         </widget>
        </item>
+       <item>
+        <widget class="QLabel" name="label_overview">
+         <property name="autoFillBackground">
+          <bool>true</bool>
+         </property>
+         <property name="text">
+          <string/>
+         </property>
+         <property name="pixmap">
+          <pixmap resource="../bitcoin.qrc">:/icons/bitcoin</pixmap>
+         </property>
+         <property name="scaledContents">
+          <bool>false</bool>
+         </property>
+         <property name="margin">
+          <number>0</number>
+         </property>
+        </widget>
+       </item>
        <item>
         <spacer name="verticalSpacer">
          <property name="orientation">
@@ -360,6 +379,8 @@
    </item>
   </layout>
  </widget>
- <resources/>
+ <resources>
+  <include location="../bitcoin.qrc"/>
+ </resources>
  <connections/>
 </ui>