[gnome-calendar/wip/pandusonu/week-view: 5/31] week-grid: created the basic skeleton of week-grid

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit dd6b1728c681bb832e47dded744819f0c62001f0
Author: pandusonu2 <pandu sonu yahoo com>
Date:   Tue Jun 7 19:43:00 2016 +0530

    week-grid: created the basic skeleton of week-grid
    
    Created the .h, .c and .ui file of week grid. Also made changes in the Makefile.am for it to get built.

 src/Makefile.am            |    2 +
 src/views/gcal-week-grid.c |  309 ++++++++++++++++++++++++++++++++++++++++++++
 src/views/gcal-week-grid.h |   45 +++++++
 src/views/gcal-week-view.c |    1 +
 4 files changed, 357 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 0a583bf..d644c64 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -67,6 +67,8 @@ gnome_calendar_SOURCES =                                  \
     gcal-utils.h                                          \
     gcal-view.c                                           \
     gcal-view.h                                           \
+    views/gcal-week-grid.c                                \
+    views/gcal-week-grid.h                                \
     views/gcal-week-header.c                              \
     views/gcal-week-header.h                              \
     views/gcal-week-view.c                                \
diff --git a/src/views/gcal-week-grid.c b/src/views/gcal-week-grid.c
new file mode 100644
index 0000000..c19c97f
--- /dev/null
+++ b/src/views/gcal-week-grid.c
@@ -0,0 +1,309 @@
+/* gcal-week-grid.c
+ *
+ * Copyright (C) 2016 Vamsi Krishna Gollapudi <pandu sonu yahoo com>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gcal-week-grid.h"
+#include "gcal-week-view.h"
+#include "gcal-utils.h"
+#include "gcal-view.h"
+#include "gcal-event-widget.h"
+
+#include <glib/gi18n.h>
+#include <string.h>
+#include <math.h>
+
+static const double dashed [] =
+{
+  1.0,
+  1.0
+};
+
+struct _GcalWeekGrid
+{
+  GtkContainer  parent;
+
+  GtkWidget    *hours_sidebar;
+
+  GcalManager  *manager;
+
+  gint          first_weekday;
+
+  gboolean      use_24h_format;
+
+  icaltimetype *active_date;
+  icaltimetype *current_date;
+};
+
+static void           gcal_week_grid_finalize               (GObject *object);
+
+static void           gcal_week_grid_add                    (GtkContainer *container,
+                                                             GtkWidget    *widget);
+
+static void           gcal_week_grid_remove                 (GtkContainer *container,
+                                                             GtkWidget    *widget);
+
+static void           gcal_week_grid_forall                 (GtkContainer *container,
+                                                             gboolean      include_internals,
+                                                             GtkCallback   callback,
+                                                             gpointer      callback_data);
+
+static void           gcal_week_grid_get_property           (GObject    *object,
+                                                             guint       prop_id,
+                                                             GValue     *value,
+                                                             GParamSpec *psec);
+
+static void           gcal_week_grid_set_property           (GObject      *object,
+                                                             guint         prop_id,
+                                                             const GValue *value,
+                                                             GParamSpec   *pspec);
+
+static gboolean       gcal_week_grid_draw                   (GtkWidget *widget,
+                                                             cairo_t   *cr);
+
+G_DEFINE_TYPE (GcalWeekGrid, gcal_week_grid, GTK_TYPE_CONTAINER);
+
+static void
+gcal_week_grid_finalize (GObject *object)
+{
+  GcalWeekGrid *self = GCAL_WEEK_GRID (object);
+
+  g_clear_pointer (&self->active_date, g_free);
+  g_clear_pointer (&self->current_date, g_free);
+}
+
+static void
+gcal_week_grid_add (GtkContainer *container,
+                    GtkWidget    *widget)
+{
+}
+
+static void
+gcal_week_grid_remove (GtkContainer *container,
+                       GtkWidget    *widget)
+{
+}
+
+static void
+gcal_week_grid_forall (GtkContainer *container,
+                       gboolean      include_internals,
+                       GtkCallback   callback,
+                       gpointer      callback_data)
+{
+}
+
+static void
+gcal_week_grid_get_property (GObject    *object,
+                             guint       prop_id,
+                             GValue     *value,
+                             GParamSpec *pspec)
+{
+  GcalWeekGrid *self = GCAL_WEEK_GRID (object);
+
+  switch (prop_id)
+    {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+gcal_week_grid_set_property (GObject      *object,
+                             guint         prop_id,
+                             const GValue *value,
+                             GParamSpec   *pspec)
+{
+  GcalWeekGrid *self = GCAL_WEEK_GRID (object);
+
+  switch (prop_id)
+   {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+   }
+}
+
+static gboolean
+gcal_week_grid_draw (GtkWidget *widget,
+                     cairo_t   *cr)
+{
+  GcalWeekGrid *self;
+  GtkStyleContext *context;
+  GtkStateFlags state;
+  GtkBorder padding;
+  GdkRGBA color;
+
+  gint i;
+  gint width;
+  gint height;
+  gdouble sidebar_width;
+  gint current_cell;
+
+  PangoLayout *layout;
+  PangoFontDescription *font_desc;
+
+  self = GCAL_WEEK_GRID (widget);
+
+  context = gtk_widget_get_style_context (widget);
+  state = gtk_widget_get_state_flags (widget);
+
+  gtk_style_context_get_color (context, state, &color);
+  gtk_style_context_get_padding (context, state, &padding);
+  gtk_style_context_get (context, state, "font", &font_desc, NULL);
+
+  layout = pango_cairo_create_layout (cr);
+  pango_layout_set_font_description (layout, font_desc);
+  gdk_cairo_set_source_rgba (cr, &color);
+
+  sidebar_width = gcal_week_view_get_sidebar_width (widget);
+  width = gtk_widget_get_allocated_width (widget);
+  height = gtk_widget_get_allocated_height (widget);
+
+  current_cell = icaltime_day_of_week (*(self->current_date)) - 1;
+  current_cell = (7 + current_cell - self->first_weekday) % 7;
+
+  gtk_style_context_save (context);
+  gtk_style_context_add_class (context, "current");
+  gtk_render_background (context, cr,
+                         ((width - sidebar_width)/ 7.0) * current_cell + sidebar_width,
+                         0,
+                         ((width  - sidebar_width)/ 7.0),
+                         height);
+  gtk_style_context_remove_class (context, "current");
+  gtk_style_context_restore (context);
+
+  for (i = 0; i < 24; i++)
+    {
+      gchar *hours;
+      if (self->use_24h_format)
+        {
+          hours = g_strdup_printf ("%02d:00", i);
+          pango_layout_set_text (layout, hours, -1);
+        }
+      else
+        {
+          hours = g_strdup_printf ("%02d:00 %s",
+                                   i % 12,
+                                   i < 12 ? _("AM") : _("PM"));
+
+          if (i == 0)
+            pango_layout_set_text (layout, _("Midnight"), -1);
+          else if (i == 12)
+            pango_layout_set_text (layout, _("Noon"), -1);
+          else
+            pango_layout_set_text (layout, hours, -1);
+        }
+
+      cairo_move_to (cr, padding.left, padding.top + (height / 24) * i);
+      pango_cairo_show_layout (cr, layout);
+
+      g_free (hours);
+    }
+
+  for (i = 0; i < 7; i++)
+    {
+      cairo_move_to (cr,
+                     sidebar_width + ((width - sidebar_width) / 7) * i + 0.4,
+                     0);
+      cairo_rel_line_to (cr, 0, height);
+    }
+
+  for (i = 0; i < 24; i++)
+    {
+      cairo_move_to (cr, 0, (height / 24) * i + 0.4);
+      cairo_rel_line_to (cr, width, 0);
+    }
+
+  cairo_stroke (cr);
+
+  cairo_set_dash (cr, dashed, 2, 0);
+  for (i = 0; i < 24; i++)
+    {
+      cairo_move_to (cr, sidebar_width, (height / 24) * i + (height / 48) + 0.4);
+      cairo_rel_line_to (cr, width - sidebar_width, 0);
+    }
+
+  cairo_stroke (cr);
+
+  pango_font_description_free (font_desc);
+  g_object_unref (layout);
+
+  return FALSE;
+}
+
+static void
+gcal_week_grid_class_init (GcalWeekGridClass *klass)
+{
+  GtkContainerClass *contianer_class = GTK_CONTAINER_CLASS (klass);
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  contianer_class->add = gcal_week_grid_add;
+  contianer_class->remove = gcal_week_grid_remove;
+  contianer_class->forall = gcal_week_grid_forall;
+
+  object_class->finalize = gcal_week_grid_finalize;
+  object_class->get_property = gcal_week_grid_get_property;
+  object_class->set_property = gcal_week_grid_set_property;
+
+  widget_class->draw = gcal_week_grid_draw;
+
+  gtk_widget_class_set_css_name (widget_class, "calendar-view");
+}
+
+static void
+gcal_week_grid_init (GcalWeekGrid *self)
+{
+  gtk_widget_init_template (GTK_WIDGET (self));
+}
+
+/* Public API */
+void
+gcal_week_grid_set_manager (GcalWeekGrid *self,
+                            GcalManager  *manager)
+{
+  g_return_if_fail (GCAL_IS_WEEK_GRID (self));
+
+  self->manager = manager;
+}
+
+void
+gcal_week_grid_set_first_weekday (GcalWeekGrid *self,
+                                  gint          nr_day)
+{
+  g_return_if_fail (GCAL_IS_WEEK_GRID (self));
+
+  self->first_weekday = nr_day;
+}
+
+void
+gcal_week_grid_set_use_24h_format (GcalWeekGrid *self,
+                                     gboolean    use_24h_format)
+{
+  g_return_if_fail (GCAL_IS_WEEK_GRID (self));
+
+  self->use_24h_format = use_24h_format;
+}
+
+void
+gcal_week_grid_set_current_date (GcalWeekGrid *self,
+                                 icaltimetype *current_date)
+{
+  g_return_if_fail (GCAL_IS_WEEK_GRID (self));
+
+  self->current_date = gcal_dup_icaltime (current_date);
+
+  gtk_widget_queue_draw (GTK_WIDGET (self));
+}
\ No newline at end of file
diff --git a/src/views/gcal-week-grid.h b/src/views/gcal-week-grid.h
new file mode 100644
index 0000000..28ca051
--- /dev/null
+++ b/src/views/gcal-week-grid.h
@@ -0,0 +1,45 @@
+/* gcal-week-grid.h
+ *
+ * Copyright (C) 2016 Vamsi Krishna Gollapudi <pandu sonu yahoo com>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GCAL_WEEK_GRID_H
+#define GCAL_WEEK_GRID_H
+
+#include "gcal-manager.h"
+#include "gcal-event-widget.h"
+#include "gcal-subscriber-view.h"
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define GCAL_TYPE_WEEK_GRID (gcal_week_grid_get_type())
+
+G_DECLARE_FINAL_TYPE (GcalWeekGrid, gcal_week_grid, GCAL, WEEK_GRID, GtkContainer)
+
+void              gcal_week_grid_set_manager        (GcalWeekGrid *week_grid,
+                                                     GcalManager  *manager);
+void              gcal_week_grid_set_first_weekday  (GcalWeekGrid *week_grid,
+                                                     gint          nr_day);
+void              gcal_week_grid_set_use_24h_format (GcalWeekGrid *week_grid,
+                                                     gboolean      use_24h_format);
+void              gcal_week_grid_set_current_date   (GcalWeekGrid *week_grid,
+                                                     icaltimetype *current_date);
+
+G_END_DECLS
+
+#endif /* GCAL_WEEK_GRID_H */
\ No newline at end of file
diff --git a/src/views/gcal-week-view.c b/src/views/gcal-week-view.c
index 8b8e305..5868671 100644
--- a/src/views/gcal-week-view.c
+++ b/src/views/gcal-week-view.c
@@ -23,6 +23,7 @@
 #include "gcal-view.h"
 #include "gcal-event-widget.h"
 #include "gcal-week-header.h"
+#include "gcal-week-grid.h"
 
 #include <glib/gi18n.h>