basic titling function added #84

2018-07-20 00:47:05 +01:00
parent a14c24ad27
commit 590644ec1b
7 changed files with 195 additions and 3 deletions
@@ -0,0 +1,151 @@
+#include "effects.h"
+
+#include <QGridLayout>
+#include <QLabel>
+#include <QOpenGLTexture>
+#include <QTextEdit>
+#include <QPainter>
+#include <QPushButton>
+#include <QColorDialog>
+#include <QDebug>
+
+#include "ui/labelslider.h"
+#include "ui/collapsiblewidget.h"
+#include "project/clip.h"
+#include "project/sequence.h"
+
+TextEffect::TextEffect(Clip *c) : Effect(c), texture(NULL) {
+    setup_effect(EFFECT_TYPE_VIDEO, VIDEO_TEXT_EFFECT);
+
+    QGridLayout* ui_layout = new QGridLayout();
+
+    ui_layout->addWidget(new QLabel("Text:"), 0, 0);
+    text_val = new QTextEdit();
+    ui_layout->addWidget(text_val, 0, 1);
+
+    ui_layout->addWidget(new QLabel("Size:"), 1, 0);
+    size_val = new LabelSlider();
+    size_val->set_minimum_value(0);
+    ui_layout->addWidget(size_val, 1, 1);
+
+    ui_layout->addWidget(new QLabel("Color:"), 2, 0);
+    set_color_button = new QPushButton();
+    ui_layout->addWidget(set_color_button, 2, 1);
+
+    ui->setLayout(ui_layout);
+
+    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()));
+
+    size_val->set_value(24);
+    text_val->setText("Sample Text");
+}
+
+TextEffect::~TextEffect() {
+    texture->destroy();
+    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);
+    pixmap.fill(Qt::transparent);
+
+    QPainter p(&pixmap);
+    p.setRenderHint(QPainter::TextAntialiasing, true);
+
+    // set font
+    QFont font = p.font();
+    font.setPointSize(size_val->value());
+    p.setFont(font);
+
+    p.setPen(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());
+    } else {
+        texture->destroy();
+        texture->setData(pixmap.toImage());
+    }
+
+    // queue a repaint of the canvas
+    field_changed();
+}
+
+void TextEffect::post_gl() {
+    if (texture != NULL) {
+        texture->bind();
+
+        int half_width = pixmap.width()/2;
+        int half_height = pixmap.height()/2;
+
+        glBegin(GL_QUADS);
+        glTexCoord2f(0.0, 0.0);
+        glVertex2f(-half_width, -half_height);
+        glTexCoord2f(1.0, 0.0);
+        glVertex2f(half_width, -half_height);
+        glTexCoord2f(1.0, 1.0);
+        glVertex2f(half_width, half_height);
+        glTexCoord2f(0.0, 1.0);
+        glVertex2f(-half_width, half_height);
+        glEnd();
+
+        texture->release();
+    }
+}
+
+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;
+    return e;
+}
+
+void TextEffect::load(QXmlStreamReader* stream) {
+    const QXmlStreamAttributes& attr = stream->attributes();
+    for (int i=0;i<attr.size();i++) {
+        const QXmlStreamAttribute& a = attr.at(i);
+        if (a.name() == "size") {
+            size_val->set_value(a.value().toDouble());
+        } else if (a.name() == "r") {
+            color.setRed(a.value().toInt());
+        } else if (a.name() == "g") {
+            color.setGreen(a.value().toInt());
+        } else if (a.name() == "b") {
+            color.setBlue(a.value().toInt());
+        }
+    }
+    while (!(stream->name() == "effect" && stream->isEndElement())) {
+        stream->readNext();
+        if (stream->name() == "text" && stream->isStartElement()) {
+            text_val->setPlainText(stream->text().toString());
+        }
+    }
+}
+
+void TextEffect::save(QXmlStreamWriter* stream) {
+    stream->writeAttribute("size", QString::number(size_val->value()));
+    stream->writeAttribute("r", QString::number(color.red()));
+    stream->writeAttribute("g", QString::number(color.green()));
+    stream->writeAttribute("b", QString::number(color.blue()));
+    stream->writeTextElement("text", text_val->toPlainText());
+}