code cleanup

effects/effects.h

@@ -4,15 +4,17 @@
 #include "project/effect.h"
 
 #include <QPixmap>
+#include <QFont>
 #include <QXmlStreamReader>
 #include <QXmlStreamWriter>
 class QSpinBox;
 class QCheckBox;
-class QComboBox;
 class LabelSlider;
 class QOpenGLTexture;
 class QTextEdit;
 class QPushButton;
+class ColorButton;
+class ComboBoxEx;
 
 enum VideoEffects {
 	VIDEO_TRANSFORM_EFFECT,
@@ -51,7 +53,7 @@ public:
     LabelSlider* anchor_x_box;
     LabelSlider* anchor_y_box;
     LabelSlider* opacity;
-    QComboBox* blend_mode_box;
+    ComboBoxEx* blend_mode_box;
 public slots:
 	void toggle_uniform_scale(bool enabled);
 private:
@@ -99,15 +101,13 @@ public:
     void save(QXmlStreamWriter* stream);
     QTextEdit* text_val;
     LabelSlider* size_val;
-    QPushButton* set_color_button;
+    ColorButton* set_color_button;
-    QColor color;
+    ComboBoxEx* set_font_combobox;
 private slots:
-    void set_color();
     void update_texture();
 private:
-    void set_button_color();
-    QPixmap pixmap;
     QOpenGLTexture* texture;
+    QFont font;
 };
 
 // audio effects

effects/paneffect.cpp

@@ -8,20 +8,12 @@
 #include "ui/labelslider.h"
 #include "ui/collapsiblewidget.h"
 
-PanEffect::PanEffect(Clip* c) : Effect(c) {
+PanEffect::PanEffect(Clip* c) : Effect(c, EFFECT_TYPE_AUDIO, AUDIO_PAN_EFFECT) {
-    setup_effect(EFFECT_TYPE_AUDIO, AUDIO_PAN_EFFECT);
-
-    QGridLayout* ui_layout = new QGridLayout();
-
 	ui_layout->addWidget(new QLabel("Pan:"), 0, 0);
     pan_val = new LabelSlider();
     pan_val->set_minimum_value(-100);
     pan_val->set_maximum_value(100);
-	ui_layout->addWidget(pan_val, 0, 1);
+    ui_layout->addWidget(pan_val, 0, 1);
-
-	ui->setLayout(ui_layout);
-
-	container->setContents(ui);
 
 	// set defaults
     pan_val->set_value(0);

effects/shakeeffect.cpp

@@ -12,11 +12,7 @@
 #include "project/sequence.h"
 #include "panels/timeline.h"
 
-ShakeEffect::ShakeEffect(Clip *c) : Effect(c) {
+ShakeEffect::ShakeEffect(Clip *c) : Effect(c, EFFECT_TYPE_VIDEO, VIDEO_SHAKE_EFFECT) {
-    setup_effect(EFFECT_TYPE_VIDEO, VIDEO_SHAKE_EFFECT);
-
-    QGridLayout* ui_layout = new QGridLayout();
-
     ui_layout->addWidget(new QLabel("Intensity:"), 0, 0);
     intensity_val = new LabelSlider();
     intensity_val->set_minimum_value(0);
@@ -32,10 +28,6 @@ ShakeEffect::ShakeEffect(Clip *c) : Effect(c) {
     frequency_val->set_minimum_value(0);
     ui_layout->addWidget(frequency_val, 2, 1);
 
-    ui->setLayout(ui_layout);
-
-    container->setContents(ui);
-
     // set defaults
     intensity_val->set_value(50);
     rotation_val->set_value(0);

effects/texteffect.cpp

@@ -7,42 +7,62 @@
 #include <QPainter>
 #include <QPushButton>
 #include <QColorDialog>
+#include <QFontDatabase>
+#include <QComboBox>
 #include <QDebug>
 
 #include "ui/labelslider.h"
 #include "ui/collapsiblewidget.h"
 #include "project/clip.h"
 #include "project/sequence.h"
+#include "ui/comboboxex.h"
+#include "ui/colorbutton.h"
 
-TextEffect::TextEffect(Clip *c) : Effect(c), texture(NULL) {
+class FontCombobox : public ComboBoxEx {
-    setup_effect(EFFECT_TYPE_VIDEO, VIDEO_TEXT_EFFECT);
+public:
-
+    FontCombobox(QWidget* parent = 0) : ComboBoxEx(parent) {}
-    QGridLayout* ui_layout = new QGridLayout();
+protected:
+    void showPopup() {
+        QString current = currentText();
+        clear();
+        QStringList fonts = QFontDatabase().families();
+        bool found = false;
+        for (int i=0;i<fonts.size();i++) {
+            addItem(fonts.at(i));
+            if (!found && fonts.at(i) == current) {
+                setCurrentIndex(i);
+                found = true;
+            }
+        }
+        QComboBox::showPopup();
+    }
+};
 
+TextEffect::TextEffect(Clip *c) : Effect(c, EFFECT_TYPE_VIDEO, VIDEO_TEXT_EFFECT), texture(NULL) {
     ui_layout->addWidget(new QLabel("Text:"), 0, 0);
     text_val = new QTextEdit();
     text_val->setUndoRedoEnabled(true);
     ui_layout->addWidget(text_val, 0, 1);
 
-    ui_layout->addWidget(new QLabel("Size:"), 1, 0);
+    ui_layout->addWidget(new QLabel("Font:"), 1, 0);
+    set_font_combobox = new FontCombobox();
+    ui_layout->addWidget(set_font_combobox, 1, 1);
+
+    ui_layout->addWidget(new QLabel("Size:"), 2, 0);
     size_val = new LabelSlider();
     size_val->set_minimum_value(0);
-    ui_layout->addWidget(size_val, 1, 1);
+    ui_layout->addWidget(size_val, 2, 1);
 
-    ui_layout->addWidget(new QLabel("Color:"), 2, 0);
+    ui_layout->addWidget(new QLabel("Color:"), 3, 0);
-    set_color_button = new QPushButton();
+    set_color_button = new ColorButton();
-    ui_layout->addWidget(set_color_button, 2, 1);
+    ui_layout->addWidget(set_color_button, 3, 1);
 
-    ui->setLayout(ui_layout);
+    set_font_combobox->addItem(font.family());
-
-    container->setContents(ui);
-
-    color = Qt::white;
-    set_button_color();
 
     connect(text_val, SIGNAL(textChanged()), this, SLOT(update_texture()));
     connect(size_val, SIGNAL(valueChanged()), this, SLOT(update_texture()));
-    connect(set_color_button, SIGNAL(clicked(bool)), this, SLOT(set_color()));
+    connect(set_color_button, SIGNAL(color_changed()), this, SLOT(update_texture()));
+    connect(set_font_combobox, SIGNAL(currentTextChanged(QString)), this, SLOT(update_texture()));
 
     size_val->set_value(24);
     text_val->setText("Sample Text");
@@ -53,38 +73,27 @@ TextEffect::~TextEffect() {
     delete texture;
 }
 
-void TextEffect::set_button_color() {
-    QPalette pal = set_color_button->palette();
-    pal.setColor(QPalette::Button, color);
-    set_color_button->setPalette(pal);
-}
-
-void TextEffect::set_color() {
-    color = QColorDialog::getColor(color, NULL);
-    set_button_color();
-    update_texture();
-}
-
 void TextEffect::update_texture() {
-    pixmap = QPixmap(parent_clip->sequence->width, parent_clip->sequence->height);
+    QImage pixmap(parent_clip->sequence->width, parent_clip->sequence->height, QImage::Format_ARGB32_Premultiplied);
     pixmap.fill(Qt::transparent);
 
     QPainter p(&pixmap);
     p.setRenderHint(QPainter::TextAntialiasing, true);
 
     // set font
-    QFont font = p.font();
+    font.setFamily(set_font_combobox->currentText());
     font.setPointSize(size_val->value());
+    font.setStyleHint(QFont::Helvetica, QFont::PreferAntialias);
     p.setFont(font);
 
-    p.setPen(color);
+    p.setPen(set_color_button->get_color());
     p.drawText(QRect(0, 0, pixmap.width(), pixmap.height()), Qt::AlignCenter | Qt::TextWordWrap, text_val->toPlainText());
 
     if (texture == NULL) {
-        texture = new QOpenGLTexture(pixmap.toImage());
+        texture = new QOpenGLTexture(pixmap);
     } else {
         texture->destroy();
-        texture->setData(pixmap.toImage());
+        texture->setData(pixmap);
     }
 
     // queue a repaint of the canvas
@@ -95,8 +104,8 @@ void TextEffect::post_gl() {
     if (texture != NULL) {
         texture->bind();
 
-        int half_width = pixmap.width()/2;
+        int half_width = parent_clip->sequence->width/2;
-        int half_height = pixmap.height()/2;
+        int half_height = parent_clip->sequence->height/2;
 
         glBegin(GL_QUADS);
         glTexCoord2f(0.0, 0.0);
@@ -117,7 +126,7 @@ Effect* TextEffect::copy(Clip* c) {
     TextEffect* e = new TextEffect(c);
     e->text_val->setPlainText(text_val->toPlainText());
     e->size_val->set_value(size_val->value());
-    e->color = color;
+    e->set_color_button->set_color(set_color_button->get_color());
     return e;
 }
 
@@ -128,16 +137,17 @@ void TextEffect::load(QXmlStreamReader* stream) {
         if (a.name() == "size") {
             size_val->set_value(a.value().toDouble());
         } else if (a.name() == "r") {
-            color.setRed(a.value().toInt());
+            set_color_button->get_color().setRed(a.value().toInt());
         } else if (a.name() == "g") {
-            color.setGreen(a.value().toInt());
+            set_color_button->get_color().setGreen(a.value().toInt());
         } else if (a.name() == "b") {
-            color.setBlue(a.value().toInt());
+            set_color_button->get_color().setBlue(a.value().toInt());
         }
     }
     while (!(stream->name() == "effect" && stream->isEndElement())) {
         stream->readNext();
         if (stream->name() == "text" && stream->isStartElement()) {
+            stream->readNext();
             text_val->setPlainText(stream->text().toString());
         }
     }
@@ -145,8 +155,8 @@ void TextEffect::load(QXmlStreamReader* stream) {
 
 void TextEffect::save(QXmlStreamWriter* stream) {
     stream->writeAttribute("size", QString::number(size_val->value()));
-    stream->writeAttribute("r", QString::number(color.red()));
+    stream->writeAttribute("r", QString::number(set_color_button->get_color().red()));
-    stream->writeAttribute("g", QString::number(color.green()));
+    stream->writeAttribute("g", QString::number(set_color_button->get_color().green()));
-    stream->writeAttribute("b", QString::number(color.blue()));
+    stream->writeAttribute("b", QString::number(set_color_button->get_color().blue()));
     stream->writeTextElement("text", text_val->toPlainText());
 }

effects/transformeffect.cpp

@@ -14,17 +14,14 @@
 #include "project/sequence.h"
 #include "io/media.h"
 #include "ui/labelslider.h"
+#include "ui/comboboxex.h"
 
 #define BLEND_MODE_NORMAL 0
 #define BLEND_MODE_SCREEN 1
 #define BLEND_MODE_MULTIPLY 2
 #define BLEND_MODE_OVERLAY 3
 
-TransformEffect::TransformEffect(Clip* c) : Effect(c) {
+TransformEffect::TransformEffect(Clip* c) : Effect(c, EFFECT_TYPE_VIDEO, VIDEO_TRANSFORM_EFFECT) {
-    setup_effect(EFFECT_TYPE_VIDEO, VIDEO_TRANSFORM_EFFECT);
-
-	QGridLayout* ui_layout = new QGridLayout();
-
 	ui_layout->addWidget(new QLabel("Position:"), 0, 0);
     position_x = new LabelSlider();
     ui_layout->addWidget(position_x, 0, 1);
@@ -63,17 +60,13 @@ TransformEffect::TransformEffect(Clip* c) : Effect(c) {
 	ui_layout->addWidget(opacity, 5, 1);
 
     ui_layout->addWidget(new QLabel("Blend Mode:"), 6, 0);
-    blend_mode_box = new QComboBox();
+    blend_mode_box = new ComboBoxEx();
     blend_mode_box->addItem("Normal", BLEND_MODE_NORMAL);
     blend_mode_box->addItem("Overlay", BLEND_MODE_OVERLAY);
     blend_mode_box->addItem("Screen", BLEND_MODE_SCREEN);
     blend_mode_box->addItem("Multiply", BLEND_MODE_MULTIPLY);
     ui_layout->addWidget(blend_mode_box, 6, 1);
 
-	ui->setLayout(ui_layout);
-
-	container->setContents(ui);
-
 	// set defaults
     position_x->set_default_value(c->sequence->width/2);
     position_y->set_default_value(c->sequence->height/2);
@@ -98,6 +91,7 @@ TransformEffect::TransformEffect(Clip* c) : Effect(c) {
     connect(opacity, SIGNAL(valueChanged()), this, SLOT(field_changed()));
 	connect(uniform_scale_box, SIGNAL(toggled(bool)), this, SLOT(toggle_uniform_scale(bool)));
 	connect(uniform_scale_box, SIGNAL(toggled(bool)), this, SLOT(field_changed()));
+    connect(uniform_scale_box, SIGNAL(clicked(bool)), this, SLOT(checkbox_command()));
     connect(blend_mode_box, SIGNAL(currentIndexChanged(int)), this, SLOT(field_changed()));
 }
 

effects/volumeeffect.cpp

@@ -9,20 +9,12 @@
 #include "ui/labelslider.h"
 #include "ui/collapsiblewidget.h"
 
-VolumeEffect::VolumeEffect(Clip* c) : Effect(c) {
+VolumeEffect::VolumeEffect(Clip* c) : Effect(c, EFFECT_TYPE_AUDIO, AUDIO_VOLUME_EFFECT) {
-    setup_effect(EFFECT_TYPE_AUDIO, AUDIO_VOLUME_EFFECT);
+    ui_layout->addWidget(new QLabel("Volume:"), 0, 0);
-
-	QGridLayout* ui_layout = new QGridLayout();
-
-	ui_layout->addWidget(new QLabel("Volume:"), 0, 0);
     volume_val = new LabelSlider();
     volume_val->set_minimum_value(0);
     volume_val->set_maximum_value(400);
-	ui_layout->addWidget(volume_val, 0, 1);
+    ui_layout->addWidget(volume_val, 0, 1);
-
-	ui->setLayout(ui_layout);
-
-	container->setContents(ui);
 
 	// set defaults
     volume_val->set_value(100);

mainwindow.cpp

@@ -31,7 +31,6 @@
 
 #define OLIVE_FILE_FILTER "Olive Project (*.ove)"
 
-QString autorecovery_filename;
 QTimer autorecovery_timer;
 
 void MainWindow::setup_layout() {
@@ -292,12 +291,8 @@ void MainWindow::on_action_Paste_triggered()
 
 void MainWindow::autorecover_interval() {
     if (project_changed) {
-        QString old_filename = project_url;
+        panel_project->save_project(true);
-        project_url = autorecovery_filename;
-        panel_project->save_project();
         qDebug() << "[INFO] Auto-recovery project saved";
-        project_url = old_filename;
-        project_changed = true;
     }
 }
 
@@ -308,7 +303,7 @@ bool MainWindow::save_project_as() {
             fn += ".ove";
         }
         project_url = fn;
-        panel_project->save_project();
+        panel_project->save_project(false);
         return true;
     }
     return false;
@@ -318,7 +313,7 @@ bool MainWindow::save_project() {
     if (project_url.isEmpty()) {
         return save_project_as();
     } else {
-        panel_project->save_project();
+        panel_project->save_project(false);
         return true;
     }
 }
@@ -361,11 +356,12 @@ void MainWindow::on_action_Open_Project_triggered()
 void MainWindow::on_actionProject_triggered()
 {
     if (can_close_project()) {
-        project_url.clear();
+        panel_effect_controls->clear_effects(true);
-        project_changed = false;
         panel_project->new_project();
         undo_stack.clear();
         panel_timeline->redraw_all_clips(false);
+        project_url.clear();
+        project_changed = false;
     }
 }
 

olive.pro

@@ -62,7 +62,9 @@ SOURCES += \
     project/undo.cpp \
     ui/scrollarea.cpp \
     effects/shakeeffect.cpp \
-    effects/texteffect.cpp
+    effects/texteffect.cpp \
+    ui/comboboxex.cpp \
+    ui/colorbutton.cpp
 
 HEADERS += \
         mainwindow.h \
@@ -97,7 +99,9 @@ HEADERS += \
     effects/transition.h \
     ui/audiomonitor.h \
     project/undo.h \
-    ui/scrollarea.h
+    ui/scrollarea.h \
+    ui/comboboxex.h \
+    ui/colorbutton.h
 
 FORMS += \
         mainwindow.ui \

panels/effectcontrols.cpp

@@ -12,6 +12,7 @@
 #include "ui/collapsiblewidget.h"
 #include "project/sequence.h"
 #include "project/undo.h"
+#include "panels/project.h"
 
 EffectControls::EffectControls(QWidget *parent) :
 	QDockWidget(parent),
@@ -37,6 +38,7 @@ void EffectControls::menu_select(QAction* q) {
         }
     }
     undo_stack.push(command);
+    project_changed = true;
 }
 
 void EffectControls::show_menu(bool video) {
@@ -134,6 +136,7 @@ void EffectControls::delete_effects() {
     }
     if (command->clips.size() > 0) {
         undo_stack.push(command);
+        project_changed = true;
     } else {
         delete command;
     }

panels/project.cpp

@@ -34,6 +34,7 @@ extern "C" {
 
 #define MAXIMUM_RECENT_PROJECTS 10
 
+QString autorecovery_filename;
 bool project_changed = false;
 QString project_url = "";
 QStringList recent_projects;
@@ -556,8 +557,9 @@ bool Project::load_worker(QFile& f, QXmlStreamReader& stream, int type) {
                         {
                             QTreeWidgetItem* parent = NULL;
                             Sequence* s = new Sequence();
+                            bool open_sequence = false;
 
-                            // load attributes about stream
+                            // load attributes about sequence
                             for (int j=0;j<stream.attributes().size();j++) {
                                 const QXmlStreamAttribute& attr = stream.attributes().at(j);
                                 if (attr.name() == "name") {
@@ -575,6 +577,8 @@ bool Project::load_worker(QFile& f, QXmlStreamReader& stream, int type) {
                                     s->audio_frequency = attr.value().toInt();
                                 } else if (attr.name() == "alayout") {
                                     s->audio_layout = attr.value().toInt();
+                                } else if (attr.name() == "open") {
+                                    open_sequence = true;
                                 }
                             }
 
@@ -692,6 +696,8 @@ bool Project::load_worker(QFile& f, QXmlStreamReader& stream, int type) {
                             }
 
                             new_sequence(NULL, s, false, parent);
+
+                            if (open_sequence) set_sequence(s);
                         }
                             break;
                         }
@@ -835,6 +841,9 @@ void Project::save_folder(QXmlStreamWriter& stream, QTreeWidgetItem* parent, int
                 stream.writeAttribute("framerate", QString::number(s->frame_rate));
                 stream.writeAttribute("afreq", QString::number(s->audio_frequency));
                 stream.writeAttribute("alayout", QString::number(s->audio_layout));
+                if (s == sequence) {
+                    stream.writeAttribute("open", "1");
+                }
                 for (int j=0;j<s->clip_count();j++) {
                     Clip* c = s->get_clip(j);
                     if (c != NULL) {
@@ -883,11 +892,11 @@ void Project::save_folder(QXmlStreamWriter& stream, QTreeWidgetItem* parent, int
     }
 }
 
-void Project::save_project() {
+void Project::save_project(bool autorecovery) {
     folder_id = 1;
     media_id = 0;
 
-    QFile file(project_url);
+    QFile file(autorecovery ? autorecovery_filename : project_url);
     if (!file.open(QIODevice::WriteOnly/* | QIODevice::Text*/)) {
         qDebug() << "[ERROR] Could not open file";
         return;
@@ -921,9 +930,10 @@ void Project::save_project() {
 
     file.close();
 
-    add_recent_project(project_url);
+    if (!autorecovery) {
-
+        add_recent_project(project_url);
-    project_changed = false;
+        project_changed = false;
+    }
 }
 
 void Project::save_recent_projects() {

panels/project.h

@@ -31,6 +31,7 @@ namespace Ui {
 class Project;
 }
 
+extern QString autorecovery_filename;
 extern bool project_changed;
 extern QString project_url;
 extern QStringList recent_projects;
@@ -56,7 +57,7 @@ public:
 
     void new_project();
     void load_project();
-    void save_project();
+    void save_project(bool autorecovery);
 
     QTreeWidgetItem* new_folder();
 

project/effect.cpp

@@ -5,27 +5,36 @@
 #include "ui/viewerwidget.h"
 #include "ui/collapsiblewidget.h"
 #include "effects/effects.h"
+#include "panels/project.h"
+#include "project/undo.h"
 
 #include <QCheckBox>
+#include <QGridLayout>
 
-Effect::Effect(Clip* c) : parent_clip(c) {
+Effect::Effect(Clip* c, int t, int i) : parent_clip(c), type(t), id(i) {
-	type = EFFECT_TYPE_INVALID;
-}
-
-void Effect::setup_effect(int t, int i) {
-    type = t;
-    id = i;
     container = new CollapsibleWidget();
     if (type == EFFECT_TYPE_VIDEO) {
         container->setText(video_effect_names[i]);
     } else if (type == EFFECT_TYPE_AUDIO) {
         container->setText(audio_effect_names[i]);
     }
+    connect(container->enabled_check, SIGNAL(clicked(bool)), this, SLOT(checkbox_command()));
+    connect(container->enabled_check, SIGNAL(clicked(bool)), this, SLOT(field_changed()));
     ui = new QWidget();
+
+    ui_layout = new QGridLayout();
+    ui->setLayout(ui_layout);
+    container->setContents(ui);
 }
 
 void Effect::field_changed() {
 	panel_viewer->viewer_widget->update();
+    project_changed = true;
+}
+
+void Effect::checkbox_command() {
+    CheckboxCommand* c = new CheckboxCommand(static_cast<QCheckBox*>(sender()));
+    undo_stack.push(c);
 }
 
 bool Effect::is_enabled() {

project/effect.h

@@ -5,6 +5,7 @@
 #include <QString>
 class QWidget;
 class CollapsibleWidget;
+class QGridLayout;
 
 struct Clip;
 class QXmlStreamReader;
@@ -16,13 +17,14 @@ class Effect : public QObject
 {
 	Q_OBJECT
 public:
-    Effect(Clip* c); // default constructor
+    Effect(Clip* c, int t, int i); // default constructor
+    Clip* parent_clip;
 	int type;
     int id;
 	QString name;
 	CollapsibleWidget* container;
+    QGridLayout* ui_layout;
 	QWidget* ui;
-    Clip* parent_clip;
 
     bool is_enabled();
 
@@ -34,12 +36,9 @@ public:
 	virtual void process_gl(int* anchor_x, int* anchor_y);
     virtual void post_gl();
     virtual void process_audio(quint8* samples, int nb_bytes);
-
 public slots:
 	void field_changed();
-
+    void checkbox_command();
-protected:
-    void setup_effect(int t, int i);
 };
 
 #endif // EFFECT_H

project/undo.cpp

@@ -3,6 +3,7 @@
 #include <QDebug>
 #include <QTreeWidgetItem>
 #include <QMessageBox>
+#include <QCheckBox>
 
 #include "project/clip.h"
 #include "project/sequence.h"
@@ -383,3 +384,18 @@ void LinkCommand::redo() {
         }
     }
 }
+
+CheckboxCommand::CheckboxCommand(QCheckBox* b) : box(b), done(true), checked(box->isChecked()) {}
+
+CheckboxCommand::~CheckboxCommand() {}
+
+void CheckboxCommand::undo() {
+    box->setChecked(!checked);
+    done = false;
+}
+
+void CheckboxCommand::redo() {
+    if (!done) {
+        box->setChecked(checked);
+    }
+}

project/undo.h

@@ -2,6 +2,7 @@
 #define UNDO_H
 
 class QTreeWidgetItem;
+class QCheckBox;
 struct Clip;
 struct Sequence;
 
@@ -79,4 +80,16 @@ private:
     QVector< QVector<int> > old_links;
 };
 
+class CheckboxCommand : public QUndoCommand {
+public:
+    CheckboxCommand(QCheckBox* b);
+    ~CheckboxCommand();
+    void undo();
+    void redo();
+private:
+    QCheckBox* box;
+    bool checked;
+    bool done;
+};
+
 #endif // UNDO_H

ui/colorbutton.cpp

@@ -0,0 +1,48 @@
+#include "colorbutton.h"
+
+#include "project/undo.h"
+
+#include <QColorDialog>
+
+ColorButton::ColorButton(QWidget *parent)
+    : QPushButton(parent), color(Qt::white) {
+    set_button_color();
+    connect(this, SIGNAL(clicked(bool)), this, SLOT(open_dialog()));
+}
+
+QColor ColorButton::get_color() {
+    return color;
+}
+
+void ColorButton::set_color(QColor c) {
+    color = c;
+}
+
+void ColorButton::set_button_color() {
+    QPalette pal = palette();
+    pal.setColor(QPalette::Button, color);
+    setPalette(pal);
+}
+
+void ColorButton::open_dialog() {
+    QColor old_color = color;
+    QColor new_color = QColorDialog::getColor(color, NULL);
+    if (old_color != new_color) {
+        ColorCommand* command = new ColorCommand(this, old_color, new_color);
+        undo_stack.push(command);
+
+        set_button_color();
+        emit color_changed();
+    }
+}
+
+ColorCommand::ColorCommand(ColorButton* s, QColor o, QColor n)
+    : sender(s), old_color(o), new_color(n) {}
+
+void ColorCommand::undo() {
+    sender->set_color(old_color);
+}
+
+void ColorCommand::redo() {
+    sender->set_color(new_color);
+}

ui/colorbutton.h

@@ -0,0 +1,34 @@
+#ifndef COLORBUTTON_H
+#define COLORBUTTON_H
+
+#include <QPushButton>
+#include <QColor>
+#include <QUndoCommand>
+
+class ColorButton : public QPushButton {
+    Q_OBJECT
+public:
+    ColorButton(QWidget* parent = 0);
+    QColor get_color();
+    void set_color(QColor c);
+private:
+    QColor color;
+    void set_button_color();
+signals:
+    void color_changed();
+private slots:
+    void open_dialog();
+};
+
+class ColorCommand : public QUndoCommand {
+public:
+    ColorCommand(ColorButton* s, QColor o, QColor n);
+    void undo();
+    void redo();
+private:
+    ColorButton* sender;
+    QColor old_color;
+    QColor new_color;
+};
+
+#endif // COLORBUTTON_H

ui/comboboxex.cpp

@@ -0,0 +1,41 @@
+#include "comboboxex.h"
+
+#include "project/undo.h"
+
+#include <QUndoCommand>
+#include <QWheelEvent>
+
+class ComboBoxExCommand : public QUndoCommand {
+public:
+    ComboBoxExCommand(ComboBoxEx* obj, int old_index, int new_index) :
+        combobox(obj), old_val(old_index), new_val(new_index), done(true) {}
+    void undo() {
+        combobox->setCurrentIndex(old_val);
+        done = false;
+    }
+    void redo() {
+        if (!done) {
+            combobox->setCurrentIndex(new_val);
+        }
+    }
+private:
+    ComboBoxEx* combobox;
+    int old_val;
+    int new_val;
+    bool done;
+};
+
+ComboBoxEx::ComboBoxEx(QWidget *parent) : QComboBox(parent), index(0) {
+    connect(this, SIGNAL(activated(int)), this, SLOT(index_changed(int)));
+}
+
+void ComboBoxEx::index_changed(int i) {
+    if (index != i) {
+        undo_stack.push(new ComboBoxExCommand(this, index, i));
+        index = i;
+    }
+}
+
+void ComboBoxEx::wheelEvent(QWheelEvent* e) {
+    e->ignore();
+}

ui/comboboxex.h

@@ -0,0 +1,18 @@
+#ifndef COMBOBOXEX_H
+#define COMBOBOXEX_H
+
+#include <QComboBox>
+#include <QDebug>
+
+class ComboBoxEx : public QComboBox {
+    Q_OBJECT
+public:
+    ComboBoxEx(QWidget* parent = 0);
+private slots:
+    void index_changed(int);
+private:
+    int index;
+    void wheelEvent(QWheelEvent* e);
+};
+
+#endif // COMBOBOXEX_H

ui/viewerwidget.cpp

@@ -19,8 +19,7 @@ extern "C" {
 	#include <libavformat/avformat.h>
 }
 
-ViewerWidget::ViewerWidget(QWidget *parent) : QOpenGLWidget(parent)
+ViewerWidget::ViewerWidget(QWidget *parent) : QOpenGLWidget(parent) {
-{	
     multithreaded = true;
     enable_paint = true;
     force_audio = false;
@@ -130,7 +129,7 @@ void ViewerWidget::paintGL() {
 
                         // perform all transform effects
                         for (int j=0;j<c->effects.size();j++) {
-                            c->effects.at(j)->process_gl(&anchor_x, &anchor_y);
+                            if (c->effects.at(j)->is_enabled()) c->effects.at(j)->process_gl(&anchor_x, &anchor_y);
                         }
 
                         if (c->opening_transition != NULL) {
@@ -169,7 +168,7 @@ void ViewerWidget::paintGL() {
 
                         // perform all transform effects
                         for (int j=0;j<c->effects.size();j++) {
-                            c->effects.at(j)->post_gl();
+                            if (c->effects.at(j)->is_enabled()) c->effects.at(j)->post_gl();
                         }
                     }
                 } else if (render_audio &&