[sysprof/wip/gtk4-port: 50/132] cellrendererpercent: subclass private progress implementation




commit 6a5542518e67a17e04cce7b0a3860954d9290c00
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 30 14:56:37 2021 -0700

    cellrendererpercent: subclass private progress implementation
    
    We might get this subclassable in GTK soon, but until then just subclass
    so we can move on and port more things.

 src/libsysprof-ui/meson.build                      |   1 +
 src/libsysprof-ui/sysprof-cell-renderer-percent.c  |   2 +-
 src/libsysprof-ui/sysprof-cell-renderer-percent.h  |   6 +-
 src/libsysprof-ui/sysprof-cell-renderer-progress.c | 712 +++++++++++++++++++++
 src/libsysprof-ui/sysprof-cell-renderer-progress.h |  53 ++
 5 files changed, 770 insertions(+), 4 deletions(-)
---
diff --git a/src/libsysprof-ui/meson.build b/src/libsysprof-ui/meson.build
index 2ad83acc..f6c6732e 100644
--- a/src/libsysprof-ui/meson.build
+++ b/src/libsysprof-ui/meson.build
@@ -24,6 +24,7 @@ libsysprof_ui_private_sources = [
   'sysprof-callgraph-page.c',
   'sysprof-cell-renderer-duration.c',
   'sysprof-cell-renderer-percent.c',
+  'sysprof-cell-renderer-progress.c',
   'sysprof-color-cycle.c',
   'sysprof-counters-aid.c',
   'sysprof-cpu-aid.c',
diff --git a/src/libsysprof-ui/sysprof-cell-renderer-percent.c 
b/src/libsysprof-ui/sysprof-cell-renderer-percent.c
index d0d25d6d..e23e1fed 100644
--- a/src/libsysprof-ui/sysprof-cell-renderer-percent.c
+++ b/src/libsysprof-ui/sysprof-cell-renderer-percent.c
@@ -37,7 +37,7 @@ enum {
   N_PROPS
 };
 
-G_DEFINE_TYPE_WITH_PRIVATE (SysprofCellRendererPercent, sysprof_cell_renderer_percent, 
GTK_TYPE_CELL_RENDERER_PROGRESS)
+G_DEFINE_TYPE_WITH_PRIVATE (SysprofCellRendererPercent, sysprof_cell_renderer_percent, 
SYSPROF_TYPE_CELL_RENDERER_PROGRESS)
 
 static GParamSpec *properties [N_PROPS];
 
diff --git a/src/libsysprof-ui/sysprof-cell-renderer-percent.h 
b/src/libsysprof-ui/sysprof-cell-renderer-percent.h
index b917ea7f..44a8fc04 100644
--- a/src/libsysprof-ui/sysprof-cell-renderer-percent.h
+++ b/src/libsysprof-ui/sysprof-cell-renderer-percent.h
@@ -20,7 +20,7 @@
 
 #pragma once
 
-#include <gtk/gtk.h>
+#include "sysprof-cell-renderer-progress.h"
 
 G_BEGIN_DECLS
 
@@ -37,12 +37,12 @@ typedef struct _SysprofCellRendererPercentClass SysprofCellRendererPercentClass;
 
 struct _SysprofCellRendererPercent
 {
-  GtkCellRendererProgress parent;
+  SysprofCellRendererProgress parent;
 };
 
 struct _SysprofCellRendererPercentClass
 {
-  GtkCellRendererProgressClass parent_class;
+  SysprofCellRendererProgressClass parent_class;
 
   /*< private >*/
   gpointer _reserved[4];
diff --git a/src/libsysprof-ui/sysprof-cell-renderer-progress.c 
b/src/libsysprof-ui/sysprof-cell-renderer-progress.c
new file mode 100644
index 00000000..a0943b64
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-cell-renderer-progress.c
@@ -0,0 +1,712 @@
+/* gtkcellrendererprogress.c
+ * Copyright (C) 2002 Naba Kumar <kh_naba users sourceforge net>
+ * heavily modified by Jörgen Scheibengruber <mfcn gmx de>
+ * heavily modified by Marco Pesenti Gritti <marco gnome org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+/*
+ * Modified by the GTK+ Team and others 1997-2007.  See the AUTHORS
+ * file for a list of people on the GTK+ Team.  See the ChangeLog
+ * files for a list of changes.  These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+#include "config.h"
+
+#include <glib/gi18n.h>
+#include <stdlib.h>
+
+#include "sysprof-cell-renderer-progress.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_VALUE,
+  PROP_TEXT,
+  PROP_PULSE,
+  PROP_TEXT_XALIGN,
+  PROP_TEXT_YALIGN,
+  PROP_ORIENTATION,
+  PROP_INVERTED
+};
+
+struct _SysprofCellRendererProgressPrivate
+{
+  int value;
+  char *text;
+  char *label;
+  int min_h;
+  int min_w;
+  int pulse;
+  int offset;
+  float text_xalign;
+  float text_yalign;
+  GtkOrientation orientation;
+  gboolean inverted;
+};
+
+static void sysprof_cell_renderer_progress_finalize     (GObject                 *object);
+static void sysprof_cell_renderer_progress_get_property (GObject                 *object,
+                                                    guint                    param_id,
+                                                    GValue                  *value,
+                                                    GParamSpec              *pspec);
+static void sysprof_cell_renderer_progress_set_property (GObject                 *object,
+                                                    guint                    param_id,
+                                                    const GValue            *value,
+                                                    GParamSpec              *pspec);
+static void sysprof_cell_renderer_progress_set_value    (SysprofCellRendererProgress *cellprogress,
+                                                    int                      value);
+static void sysprof_cell_renderer_progress_set_text     (SysprofCellRendererProgress *cellprogress,
+                                                    const char              *text);
+static void sysprof_cell_renderer_progress_set_pulse    (SysprofCellRendererProgress *cellprogress,
+                                                    int                      pulse);
+static void compute_dimensions                      (GtkCellRenderer         *cell,
+                                                    GtkWidget               *widget,
+                                                    const char              *text,
+                                                    int                     *width,
+                                                    int                     *height);
+static void sysprof_cell_renderer_progress_snapshot     (GtkCellRenderer         *cell,
+                                                    GtkSnapshot             *snapshot,
+                                                    GtkWidget               *widget,
+                                                    const GdkRectangle      *background_area,
+                                                    const GdkRectangle      *cell_area,
+                                                    GtkCellRendererState    flags);
+
+
+G_DEFINE_TYPE_WITH_CODE (SysprofCellRendererProgress, sysprof_cell_renderer_progress, GTK_TYPE_CELL_RENDERER,
+                         G_ADD_PRIVATE (SysprofCellRendererProgress)
+                         G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
+
+static void
+recompute_label (SysprofCellRendererProgress *cellprogress)
+{
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+  char *label;
+
+  if (priv->text)
+    label = g_strdup (priv->text);
+  else if (priv->pulse < 0)
+    label = g_strdup_printf (C_("progress bar label", "%d %%"), priv->value);
+  else
+    label = NULL;
+
+  g_free (priv->label);
+  priv->label = label;
+}
+
+static void
+sysprof_cell_renderer_progress_set_value (SysprofCellRendererProgress *cellprogress,
+                                     int                      value)
+{
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+
+  if (priv->value != value)
+    {
+      priv->value = value;
+      recompute_label (cellprogress);
+      g_object_notify (G_OBJECT (cellprogress), "value");
+    }
+}
+
+static void
+sysprof_cell_renderer_progress_set_text (SysprofCellRendererProgress *cellprogress,
+                                    const char              *text)
+{
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+  char *new_text;
+
+  new_text = g_strdup (text);
+  g_free (priv->text);
+  priv->text = new_text;
+  recompute_label (cellprogress);
+  g_object_notify (G_OBJECT (cellprogress), "text");
+}
+
+static void
+sysprof_cell_renderer_progress_set_pulse (SysprofCellRendererProgress *cellprogress,
+                                     int                      pulse)
+{
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+
+  if (pulse != priv->pulse)
+    {
+      if (pulse <= 0)
+        priv->offset = 0;
+      else
+        priv->offset = pulse;
+      g_object_notify (G_OBJECT (cellprogress), "pulse");
+    }
+
+  priv->pulse = pulse;
+  recompute_label (cellprogress);
+}
+
+static void
+sysprof_cell_renderer_progress_finalize (GObject *object)
+{
+  SysprofCellRendererProgress *cellprogress = SYSPROF_CELL_RENDERER_PROGRESS (object);
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+
+  g_free (priv->text);
+  g_free (priv->label);
+
+  G_OBJECT_CLASS (sysprof_cell_renderer_progress_parent_class)->finalize (object);
+}
+
+static void
+sysprof_cell_renderer_progress_get_property (GObject    *object,
+                                        guint       param_id,
+                                        GValue     *value,
+                                        GParamSpec *pspec)
+{
+  SysprofCellRendererProgress *cellprogress = SYSPROF_CELL_RENDERER_PROGRESS (object);
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+
+  switch (param_id)
+    {
+    case PROP_VALUE:
+      g_value_set_int (value, priv->value);
+      break;
+    case PROP_TEXT:
+      g_value_set_string (value, priv->text);
+      break;
+    case PROP_PULSE:
+      g_value_set_int (value, priv->pulse);
+      break;
+    case PROP_TEXT_XALIGN:
+      g_value_set_float (value, priv->text_xalign);
+      break;
+    case PROP_TEXT_YALIGN:
+      g_value_set_float (value, priv->text_yalign);
+      break;
+    case PROP_ORIENTATION:
+      g_value_set_enum (value, priv->orientation);
+      break;
+    case PROP_INVERTED:
+      g_value_set_boolean (value, priv->inverted);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+    }
+}
+
+static void
+sysprof_cell_renderer_progress_set_property (GObject      *object,
+                                        guint         param_id,
+                                        const GValue *value,
+                                        GParamSpec   *pspec)
+{
+  SysprofCellRendererProgress *cellprogress = SYSPROF_CELL_RENDERER_PROGRESS (object);
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+
+  switch (param_id)
+    {
+    case PROP_VALUE:
+      sysprof_cell_renderer_progress_set_value (cellprogress,
+                                           g_value_get_int (value));
+      break;
+    case PROP_TEXT:
+      sysprof_cell_renderer_progress_set_text (cellprogress,
+                                          g_value_get_string (value));
+      break;
+    case PROP_PULSE:
+      sysprof_cell_renderer_progress_set_pulse (cellprogress,
+                                           g_value_get_int (value));
+      break;
+    case PROP_TEXT_XALIGN:
+      priv->text_xalign = g_value_get_float (value);
+      break;
+    case PROP_TEXT_YALIGN:
+      priv->text_yalign = g_value_get_float (value);
+      break;
+    case PROP_ORIENTATION:
+      if (priv->orientation != g_value_get_enum (value))
+        {
+          priv->orientation = g_value_get_enum (value);
+          g_object_notify_by_pspec (object, pspec);
+        }
+      break;
+    case PROP_INVERTED:
+      if (priv->inverted != g_value_get_boolean (value))
+        {
+          priv->inverted = g_value_get_boolean (value);
+          g_object_notify_by_pspec (object, pspec);
+        }
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+    }
+}
+
+static void
+compute_dimensions (GtkCellRenderer *cell,
+                   GtkWidget       *widget,
+                   const char      *text,
+                   int             *width,
+                   int             *height)
+{
+  PangoRectangle logical_rect;
+  PangoLayout *layout;
+  int xpad, ypad;
+
+  layout = gtk_widget_create_pango_layout (widget, text);
+  pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
+
+  gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
+
+  if (width)
+    *width = logical_rect.width + xpad * 2;
+
+  if (height)
+    *height = logical_rect.height + ypad * 2;
+
+  g_object_unref (layout);
+}
+
+static void
+sysprof_cell_renderer_progress_get_preferred_width (GtkCellRenderer *cell,
+                                                GtkWidget       *widget,
+                                                int             *minimum,
+                                                int             *natural)
+{
+  SysprofCellRendererProgress *self = SYSPROF_CELL_RENDERER_PROGRESS (cell);
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private (self);
+  int w, h;
+  int size;
+
+  if (priv->min_w < 0)
+    {
+      char *text = g_strdup_printf (C_("progress bar label", "%d %%"), 100);
+      compute_dimensions (cell, widget, text,
+                         &priv->min_w,
+                         &priv->min_h);
+      g_free (text);
+    }
+
+  compute_dimensions (cell, widget, priv->label, &w, &h);
+
+  size = MAX (priv->min_w, w);
+
+  if (minimum != NULL)
+    *minimum = size;
+  if (natural != NULL)
+    *natural = size;
+}
+
+static void
+sysprof_cell_renderer_progress_get_preferred_height (GtkCellRenderer *cell,
+                                                 GtkWidget       *widget,
+                                                 int             *minimum,
+                                                 int             *natural)
+{
+  SysprofCellRendererProgress *self = SYSPROF_CELL_RENDERER_PROGRESS (cell);
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private (self);
+  int w, h;
+  int size;
+
+  if (priv->min_w < 0)
+    {
+      char *text = g_strdup_printf (C_("progress bar label", "%d %%"), 100);
+      compute_dimensions (cell, widget, text,
+                         &priv->min_w,
+                         &priv->min_h);
+      g_free (text);
+    }
+
+  compute_dimensions (cell, widget, priv->label, &w, &h);
+
+  size = MIN (priv->min_h, h);
+
+  if (minimum != NULL)
+    *minimum = size;
+  if (natural != NULL)
+    *natural = size;
+}
+
+static inline int
+get_bar_size (int pulse,
+             int value,
+             int full_size)
+{
+  int bar_size;
+
+  if (pulse < 0)
+    bar_size = full_size * MAX (0, value) / 100;
+  else if (pulse == 0)
+    bar_size = 0;
+  else if (pulse == G_MAXINT)
+    bar_size = full_size;
+  else
+    bar_size = MAX (2, full_size / 5);
+
+  return bar_size;
+}
+
+static inline int
+get_bar_position (int      start,
+                 int      full_size,
+                 int      bar_size,
+                 int      pulse,
+                 int      offset,
+                 gboolean is_rtl)
+{
+  int position;
+
+  if (pulse < 0 || pulse == 0 || pulse == G_MAXINT)
+    {
+      position = is_rtl ? (start + full_size - bar_size) : start;
+    }
+  else
+    {
+      position = (is_rtl ? offset + 12 : offset) % 24;
+      if (position > 12)
+       position = 24 - position;
+      position = start + full_size * position / 15;
+    }
+
+  return position;
+}
+
+static void
+sysprof_cell_renderer_progress_snapshot (GtkCellRenderer      *cell,
+                                     GtkSnapshot          *snapshot,
+                                     GtkWidget            *widget,
+                                     const GdkRectangle   *background_area,
+                                     const GdkRectangle   *cell_area,
+                                     GtkCellRendererState  flags)
+{
+  SysprofCellRendererProgress *cellprogress = SYSPROF_CELL_RENDERER_PROGRESS (cell);
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+  GtkStyleContext *context;
+  GtkBorder padding;
+  PangoLayout *layout;
+  PangoRectangle logical_rect;
+  int x, y, w, h, x_pos, y_pos, bar_position, bar_size, start, full_size;
+  int xpad, ypad;
+  GdkRectangle clip;
+  gboolean is_rtl;
+
+  context = gtk_widget_get_style_context (widget);
+  is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
+
+  gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
+  x = cell_area->x + xpad;
+  y = cell_area->y + ypad;
+  w = cell_area->width - xpad * 2;
+  h = cell_area->height - ypad * 2;
+
+  gtk_style_context_save (context);
+  gtk_style_context_add_class (context, "trough");
+
+  gtk_snapshot_render_background (snapshot, context, x, y, w, h);
+  gtk_snapshot_render_frame (snapshot, context, x, y, w, h);
+
+  gtk_style_context_get_padding (context, &padding);
+
+  x += padding.left;
+  y += padding.top;
+  w -= padding.left + padding.right;
+  h -= padding.top + padding.bottom;
+
+  gtk_style_context_restore (context);
+
+  if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
+    {
+      clip.y = y;
+      clip.height = h;
+
+      start = x;
+      full_size = w;
+
+      bar_size = get_bar_size (priv->pulse, priv->value, full_size);
+
+      if (!priv->inverted)
+       bar_position = get_bar_position (start, full_size, bar_size,
+                                        priv->pulse, priv->offset, is_rtl);
+      else
+       bar_position = get_bar_position (start, full_size, bar_size,
+                                        priv->pulse, priv->offset, !is_rtl);
+
+      clip.width = bar_size;
+      clip.x = bar_position;
+    }
+  else
+    {
+      clip.x = x;
+      clip.width = w;
+
+      start = y;
+      full_size = h;
+
+      bar_size = get_bar_size (priv->pulse, priv->value, full_size);
+
+      if (priv->inverted)
+       bar_position = get_bar_position (start, full_size, bar_size,
+                                        priv->pulse, priv->offset, TRUE);
+      else
+       bar_position = get_bar_position (start, full_size, bar_size,
+                                        priv->pulse, priv->offset, FALSE);
+
+      clip.height = bar_size;
+      clip.y = bar_position;
+    }
+
+  if (bar_size > 0)
+    {
+      gtk_style_context_save (context);
+      gtk_style_context_add_class (context, "progressbar");
+
+      gtk_snapshot_render_background (snapshot, context, clip.x, clip.y, clip.width, clip.height);
+      gtk_snapshot_render_frame (snapshot, context, clip.x, clip.y, clip.width, clip.height);
+
+      gtk_style_context_restore (context);
+    }
+
+  if (priv->label)
+    {
+      float text_xalign;
+
+      layout = gtk_widget_create_pango_layout (widget, priv->label);
+      pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
+
+      if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
+       text_xalign = 1.0 - priv->text_xalign;
+      else
+       text_xalign = priv->text_xalign;
+
+      x_pos = x + padding.left + text_xalign *
+       (w - padding.left - padding.right - logical_rect.width);
+
+      y_pos = y + padding.top + priv->text_yalign *
+       (h - padding.top - padding.bottom - logical_rect.height);
+
+      gtk_snapshot_push_clip (snapshot,
+                              &GRAPHENE_RECT_INIT(
+                                  clip.x, clip.y,
+                                  clip.width, clip.height
+                              ));
+
+      gtk_style_context_save (context);
+      gtk_style_context_add_class (context, "progressbar");
+
+      gtk_snapshot_render_layout (snapshot, context,
+                                  x_pos, y_pos,
+                                  layout);
+
+      gtk_style_context_restore (context);
+      gtk_snapshot_pop (snapshot);
+
+      gtk_style_context_save (context);
+      gtk_style_context_add_class (context, "trough");
+
+      if (bar_position > start)
+        {
+         if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
+           {
+             clip.x = x;
+             clip.width = bar_position - x;
+           }
+         else
+           {
+             clip.y = y;
+             clip.height = bar_position - y;
+           }
+
+          gtk_snapshot_push_clip (snapshot,
+                                  &GRAPHENE_RECT_INIT(
+                                      clip.x, clip.y,
+                                      clip.width, clip.height
+                                  ));
+
+          gtk_snapshot_render_layout (snapshot, context,
+                                      x_pos, y_pos,
+                                      layout);
+
+          gtk_snapshot_pop (snapshot);
+        }
+
+      if (bar_position + bar_size < start + full_size)
+        {
+         if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
+           {
+             clip.x = bar_position + bar_size;
+             clip.width = x + w - (bar_position + bar_size);
+           }
+         else
+           {
+             clip.y = bar_position + bar_size;
+             clip.height = y + h - (bar_position + bar_size);
+           }
+
+          gtk_snapshot_push_clip (snapshot,
+                                  &GRAPHENE_RECT_INIT(
+                                      clip.x, clip.y,
+                                      clip.width, clip.height
+                                  ));
+
+          gtk_snapshot_render_layout (snapshot, context,
+                                      x_pos, y_pos,
+                                      layout);
+
+          gtk_snapshot_pop (snapshot);
+        }
+
+      gtk_style_context_restore (context);
+      g_object_unref (layout);
+    }
+}
+
+static void
+sysprof_cell_renderer_progress_class_init (SysprofCellRendererProgressClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
+
+  object_class->finalize = sysprof_cell_renderer_progress_finalize;
+  object_class->get_property = sysprof_cell_renderer_progress_get_property;
+  object_class->set_property = sysprof_cell_renderer_progress_set_property;
+
+  cell_class->get_preferred_width = sysprof_cell_renderer_progress_get_preferred_width;
+  cell_class->get_preferred_height = sysprof_cell_renderer_progress_get_preferred_height;
+  cell_class->snapshot = sysprof_cell_renderer_progress_snapshot;
+
+  /**
+   * SysprofCellRendererProgress:value:
+   *
+   * The "value" property determines the percentage to which the
+   * progress bar will be "filled in".
+   **/
+  g_object_class_install_property (object_class,
+                                  PROP_VALUE,
+                                  g_param_spec_int ("value",
+                                                    "Value",
+                                                    "Value of the progress bar",
+                                                    0, 100, 0,
+                                                    G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
+
+  /**
+   * SysprofCellRendererProgress:text:
+   *
+   * The "text" property determines the label which will be drawn
+   * over the progress bar. Setting this property to %NULL causes the default
+   * label to be displayed. Setting this property to an empty string causes
+   * no label to be displayed.
+   **/
+  g_object_class_install_property (object_class,
+                                  PROP_TEXT,
+                                  g_param_spec_string ("text",
+                                                       "Text",
+                                                       "Text on the progress bar",
+                                                       NULL,
+                                                       G_PARAM_READWRITE));
+
+  /**
+   * SysprofCellRendererProgress:pulse:
+   *
+   * Setting this to a non-negative value causes the cell renderer to
+   * enter "activity mode", where a block bounces back and forth to
+   * indicate that some progress is made, without specifying exactly how
+   * much.
+   *
+   * Each increment of the property causes the block to move by a little
+   * bit.
+   *
+   * To indicate that the activity has not started yet, set the property
+   * to zero. To indicate completion, set the property to %G_MAXINT.
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_PULSE,
+                                   g_param_spec_int ("pulse",
+                                                     "Pulse",
+                                                     "Set this to positive values to indicate that some 
progress is made, but you don’t know how much.",
+                                                     -1, G_MAXINT, -1,
+                                                     G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
+
+  /**
+   * SysprofCellRendererProgress:text-xalign:
+   *
+   * The "text-xalign" property controls the horizontal alignment of the
+   * text in the progress bar.  Valid values range from 0 (left) to 1
+   * (right).  Reserved for RTL layouts.
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_TEXT_XALIGN,
+                                   g_param_spec_float ("text-xalign",
+                                                       "Text x alignment",
+                                                       "The horizontal text alignment, from 0 (left) to 1 
(right). Reversed for RTL layouts.",
+                                                       0.0, 1.0, 0.5,
+                                                       G_PARAM_READWRITE));
+
+  /**
+   * SysprofCellRendererProgress:text-yalign:
+   *
+   * The "text-yalign" property controls the vertical alignment of the
+   * text in the progress bar.  Valid values range from 0 (top) to 1
+   * (bottom).
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_TEXT_YALIGN,
+                                   g_param_spec_float ("text-yalign",
+                                                       "Text y alignment",
+                                                       "The vertical text alignment, from 0 (top) to 1 
(bottom).",
+                                                       0.0, 1.0, 0.5,
+                                                       G_PARAM_READWRITE));
+
+  g_object_class_override_property (object_class,
+                                    PROP_ORIENTATION,
+                                    "orientation");
+
+  g_object_class_install_property (object_class,
+                                   PROP_INVERTED,
+                                   g_param_spec_boolean ("inverted",
+                                                         "Inverted",
+                                                         "Invert the direction in which the progress bar 
grows",
+                                                         FALSE,
+                                                         G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
+}
+
+static void
+sysprof_cell_renderer_progress_init (SysprofCellRendererProgress *cellprogress)
+{
+  SysprofCellRendererProgressPrivate *priv = sysprof_cell_renderer_progress_get_instance_private 
(cellprogress);
+
+  priv->value = 0;
+  priv->text = NULL;
+  priv->label = NULL;
+  priv->min_w = -1;
+  priv->min_h = -1;
+  priv->pulse = -1;
+  priv->offset = 0;
+
+  priv->text_xalign = 0.5;
+  priv->text_yalign = 0.5;
+
+  priv->orientation = GTK_ORIENTATION_HORIZONTAL,
+  priv->inverted = FALSE;
+}
+
+/**
+ * sysprof_cell_renderer_progress_new:
+ *
+ * Creates a new `SysprofCellRendererProgress`.
+ *
+ * Returns: the new cell renderer
+ **/
+GtkCellRenderer*
+sysprof_cell_renderer_progress_new (void)
+{
+  return g_object_new (SYSPROF_TYPE_CELL_RENDERER_PROGRESS, NULL);
+}
diff --git a/src/libsysprof-ui/sysprof-cell-renderer-progress.h 
b/src/libsysprof-ui/sysprof-cell-renderer-progress.h
new file mode 100644
index 00000000..7a006072
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-cell-renderer-progress.h
@@ -0,0 +1,53 @@
+/* gtkcellrendererprogress.h
+ * Copyright (C) 2002 Naba Kumar <kh_naba users sourceforge net>
+ * modified by Jörgen Scheibengruber <mfcn gmx de>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Modified by the GTK+ Team and others 1997-2004.  See the AUTHORS
+ * file for a list of people on the GTK+ Team.  See the ChangeLog
+ * files for a list of changes.  These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+#pragma once
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_CELL_RENDERER_PROGRESS    (sysprof_cell_renderer_progress_get_type ())
+#define SYSPROF_CELL_RENDERER_PROGRESS(obj)    (G_TYPE_CHECK_INSTANCE_CAST ((obj), 
SYSPROF_TYPE_CELL_RENDERER_PROGRESS, SysprofCellRendererProgress))
+#define SYSPROF_IS_CELL_RENDERER_PROGRESS(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), 
SYSPROF_TYPE_CELL_RENDERER_PROGRESS))
+
+typedef struct _SysprofCellRendererProgress SysprofCellRendererProgress;
+typedef struct _SysprofCellRendererProgressClass  SysprofCellRendererProgressClass;
+typedef struct _SysprofCellRendererProgressPrivate SysprofCellRendererProgressPrivate;
+
+struct _SysprofCellRendererProgress
+{
+  GtkCellRenderer parent_instance;
+};
+
+struct _SysprofCellRendererProgressClass
+{
+  GtkCellRendererClass parent_class;
+};
+
+GType            sysprof_cell_renderer_progress_get_type (void) G_GNUC_CONST;
+GtkCellRenderer *sysprof_cell_renderer_progress_new      (void);
+
+G_END_DECLS


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