Initial commit.

src/widgets/didyoumean.cpp

@@ -0,0 +1,177 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+#include "config.h"
+
+#include <QEvent>
+#include <QKeyEvent>
+#include <QPainter>
+#include <QToolButton>
+
+#include "didyoumean.h"
+
+#include "core/logging.h"
+
+const int DidYouMean::kPadding = 3;
+
+DidYouMean::DidYouMean(QWidget *buddy, QWidget *parent)
+  : QWidget(parent, Qt::ToolTip),
+    buddy_(buddy),
+    close_(new QToolButton(this)),
+    normal_font_(font()),
+    correction_font_(font()),
+    press_enter_font_(font()) {
+
+  // Close icon
+  close_->setToolTip(tr("Close"));
+  close_->setIcon(QIcon(":/qt-project.org/styles/macstyle/images/closedock-16.png"));
+  close_->setIconSize(QSize(16, 16));
+  connect(close_, SIGNAL(clicked()), SLOT(hide()));
+
+  // Cursors
+  setCursor(Qt::PointingHandCursor);
+  close_->setCursor(Qt::ArrowCursor);
+
+  // Fonts
+  correction_font_.setBold(true);
+  press_enter_font_.setBold(true);
+  press_enter_font_.setPointSizeF(7.5);
+
+  hide();
+  buddy_->installEventFilter(this);
+
+  // Texts
+  did_you_mean_ = tr("Did you mean") + ":  ";
+  press_enter_ = "(" + tr("press enter") + ")";
+
+  // Texts' sizes
+  did_you_mean_size_ = QFontMetrics(normal_font_).width(did_you_mean_);
+  press_enter_size_ = QFontMetrics(press_enter_font_).width(press_enter_);
+
+}
+
+bool DidYouMean::eventFilter(QObject *object, QEvent *event) {
+  
+  if (object != buddy_) {
+    return QObject::eventFilter(object, event);
+  }
+
+  switch (event->type()) {
+    case QEvent::Move:
+    case QEvent::Resize:
+      if (isVisible()) {
+        UpdateGeometry();
+      }
+      break;
+
+    case QEvent::KeyPress:
+      if (!isVisible()) {
+        break;
+      }
+
+      switch (static_cast<QKeyEvent*>(event)->key()) {
+        case Qt::Key_Return:
+        case Qt::Key_Enter:
+          emit Accepted(correction_);
+          // fallthrough
+        case Qt::Key_Escape:
+          hide();
+          return true;
+
+        default:
+          break;
+      }
+
+      break;
+
+    case QEvent::FocusOut:
+    case QEvent::WindowDeactivate:
+      hide();
+      break;
+
+    default:
+      break;
+  }
+
+  return QObject::eventFilter(object, event);
+}
+
+void DidYouMean::showEvent(QShowEvent*) {
+  UpdateGeometry();
+}
+
+void DidYouMean::UpdateGeometry() {
+  const int text_height = fontMetrics().height();
+  const int height = text_height + kPadding * 2;
+
+  move(buddy_->mapToGlobal(buddy_->rect().bottomLeft()));
+  // Resize to len(text to display) + total number of padding added +
+  // size(close button), so the "Did you mean" widget is always fully displayed
+
+  resize(QSize(did_you_mean_size_ + QFontMetrics(correction_font_).width(correction_ + "  ") + press_enter_size_ + kPadding * 6 + close_->width(), height));
+
+  close_->move(kPadding, kPadding);
+  close_->resize(text_height, text_height);
+}
+
+void DidYouMean::paintEvent(QPaintEvent*) {
+  QPainter p(this);
+
+  // Draw the background
+  QColor bg(palette().color(QPalette::Inactive, QPalette::ToolTipBase));
+  p.fillRect(0, 0, width()-1, height()-1, bg);
+
+  // Border
+  p.setPen(Qt::black);
+  p.drawRect(0, 0, width()-1, height()-1);
+
+  // Text rectangle
+  QRect text_rect(kPadding + close_->width() + kPadding, kPadding, rect().width() - kPadding, rect().height() - kPadding);
+
+  // Text
+  p.setFont(normal_font_);
+  p.drawText(text_rect, Qt::AlignLeft | Qt::AlignVCenter, did_you_mean_);
+  text_rect.setLeft(text_rect.left() + p.fontMetrics().width(did_you_mean_));
+
+  p.setFont(correction_font_);
+  p.drawText(text_rect, Qt::AlignLeft | Qt::AlignVCenter, correction_);
+  text_rect.setLeft(text_rect.left() + p.fontMetrics().width(correction_ + "  "));
+
+  p.setPen(palette().color(QPalette::Disabled, QPalette::Text));
+  p.setFont(press_enter_font_);
+  p.drawText(text_rect, Qt::AlignLeft | Qt::AlignVCenter, press_enter_);
+}
+
+void DidYouMean::SetCorrection(const QString &correction) {
+  correction_ = correction;
+  UpdateGeometry();
+  update();
+}
+
+void DidYouMean::Show(const QString &correction) {
+  SetCorrection(correction);
+  show();
+}
+
+void DidYouMean::mouseReleaseEvent(QMouseEvent *e) {
+  emit Accepted(correction_);
+  hide();
+}
+