[gtksourceview/wip/grid] Provide a way to draw background patterns
- From: Ignacio Casal Quinteiro <icq src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtksourceview/wip/grid] Provide a way to draw background patterns
- Date: Wed, 21 Jan 2015 13:23:52 +0000 (UTC)
commit e351101872a60d9d12086f6c25261766b767d759
Author: Ignacio Casal Quinteiro <icq gnome org>
Date: Wed Jan 21 14:23:10 2015 +0100
Provide a way to draw background patterns
A new property background-pattern is added to support
different kind of patterns. For now only Grid is supported.
Also a new background-pattern style has been added so it
can be used by the style schemes, if this is not provided
a default style is used by picking the background color
and making it a bit darker.
docs/reference/gtksourceview-3.0-sections.txt | 3 +
gtksourceview/gtksourcestylescheme.c | 18 +++
gtksourceview/gtksourcestylescheme.h | 5 +
gtksourceview/gtksourcetypes.h | 13 ++
gtksourceview/gtksourceview.c | 161 ++++++++++++++++++++++++-
gtksourceview/gtksourceview.h | 5 +
tests/test-widget.c | 27 ++++
tests/test-widget.ui | 15 +++
8 files changed, 246 insertions(+), 1 deletions(-)
---
diff --git a/docs/reference/gtksourceview-3.0-sections.txt b/docs/reference/gtksourceview-3.0-sections.txt
index 8b3e2bd..7b86ced 100644
--- a/docs/reference/gtksourceview-3.0-sections.txt
+++ b/docs/reference/gtksourceview-3.0-sections.txt
@@ -801,6 +801,7 @@ GtkSourceView
GtkSourceSmartHomeEndType
GtkSourceDrawSpacesFlags
GtkSourceViewGutterPosition
+GtkSourceBackgroundPatternType
gtk_source_view_new
gtk_source_view_new_with_buffer
gtk_source_view_set_show_line_numbers
@@ -834,6 +835,8 @@ gtk_source_view_set_draw_spaces
gtk_source_view_get_draw_spaces
gtk_source_view_get_completion
gtk_source_view_get_gutter
+gtk_source_view_set_background_pattern
+gtk_source_view_get_background_pattern
<SUBSECTION Standard>
GtkSourceViewClass
GTK_SOURCE_IS_VIEW
diff --git a/gtksourceview/gtksourcestylescheme.c b/gtksourceview/gtksourcestylescheme.c
index 7c7207c..25ad907 100644
--- a/gtksourceview/gtksourcestylescheme.c
+++ b/gtksourceview/gtksourcestylescheme.c
@@ -54,6 +54,7 @@
#define STYLE_LINE_NUMBERS "line-numbers"
#define STYLE_RIGHT_MARGIN "right-margin"
#define STYLE_DRAW_SPACES "draw-spaces"
+#define STYLE_BACKGROUND_PATTERN "background-pattern"
#define STYLE_SCHEME_VERSION "1.0"
@@ -634,6 +635,23 @@ _gtk_source_style_scheme_get_current_line_color (GtkSourceStyleScheme *scheme,
return get_color (style, FALSE, color);
}
+/*
+ * Returns TRUE if the style for background-pattern-color is set in the scheme
+ */
+gboolean
+_gtk_source_style_scheme_get_background_pattern_color (GtkSourceStyleScheme *scheme,
+ GdkRGBA *color)
+{
+ GtkSourceStyle *style;
+
+ g_return_val_if_fail (GTK_SOURCE_IS_STYLE_SCHEME (scheme), FALSE);
+ g_return_val_if_fail (color != NULL, FALSE);
+
+ style = gtk_source_style_scheme_get_style (scheme, STYLE_BACKGROUND_PATTERN);
+
+ return get_color (style, FALSE, color);
+}
+
static void
update_cursor_colors (GtkWidget *widget,
GtkSourceStyle *style_primary,
diff --git a/gtksourceview/gtksourcestylescheme.h b/gtksourceview/gtksourcestylescheme.h
index f7bbca0..8a37ee5 100644
--- a/gtksourceview/gtksourcestylescheme.h
+++ b/gtksourceview/gtksourcestylescheme.h
@@ -104,6 +104,11 @@ GtkSourceStyle *_gtk_source_style_scheme_get_draw_spaces_style
(GtkSou
G_GNUC_INTERNAL
gboolean _gtk_source_style_scheme_get_current_line_color (GtkSourceStyleScheme *scheme,
GdkRGBA *color);
+
+G_GNUC_INTERNAL
+gboolean _gtk_source_style_scheme_get_background_pattern_color (GtkSourceStyleScheme *scheme,
+ GdkRGBA *color);
+
G_END_DECLS
#endif /* __GTK_SOURCE_STYLE_SCHEME_H__ */
diff --git a/gtksourceview/gtksourcetypes.h b/gtksourceview/gtksourcetypes.h
index 5c1af72..6d60a65 100644
--- a/gtksourceview/gtksourcetypes.h
+++ b/gtksourceview/gtksourcetypes.h
@@ -96,6 +96,19 @@ typedef enum
GTK_SOURCE_COMPRESSION_TYPE_GZIP
} GtkSourceCompressionType;
+/**
+ * GtkSourceBackgroundPatternType:
+ * @GTK_SOURCE_BACKGROUND_PATTERN_TYPE_NONE: no pattern
+ * @GTK_SOURCE_BACKGROUND_PATTERN_TYPE_GRID: grid pattern
+ *
+ * Since: 3.16
+ */
+typedef enum
+{
+ GTK_SOURCE_BACKGROUND_PATTERN_TYPE_NONE,
+ GTK_SOURCE_BACKGROUND_PATTERN_TYPE_GRID
+} GtkSourceBackgroundPatternType;
+
G_END_DECLS
#endif /* __GTK_SOURCE_TYPES_H__ */
diff --git a/gtksourceview/gtksourceview.c b/gtksourceview/gtksourceview.c
index 19c5c70..a187e53 100644
--- a/gtksourceview/gtksourceview.c
+++ b/gtksourceview/gtksourceview.c
@@ -150,7 +150,8 @@ enum {
PROP_SMART_HOME_END,
PROP_HIGHLIGHT_CURRENT_LINE,
PROP_INDENT_ON_TAB,
- PROP_DRAW_SPACES
+ PROP_DRAW_SPACES,
+ PROP_BACKGROUND_PATTERN
};
struct _GtkSourceViewPrivate
@@ -181,6 +182,8 @@ struct _GtkSourceViewPrivate
guint tab_width;
gint indent_width;
GtkSourceSmartHomeEndType smart_home_end;
+ GtkSourceBackgroundPatternType background_pattern;
+ GdkRGBA background_pattern_color;
guint tabs_set : 1;
guint show_line_numbers : 1;
@@ -192,6 +195,7 @@ struct _GtkSourceViewPrivate
guint show_right_margin : 1;
guint style_scheme_applied : 1;
guint current_line_color_set : 1;
+ guint background_pattern_color_set : 1;
};
typedef struct _MarkCategory MarkCategory;
@@ -539,6 +543,22 @@ gtk_source_view_class_init (GtkSourceViewClass *klass)
0,
G_PARAM_READWRITE));
+ /**
+ * GtkSourceView:background-pattern:
+ *
+ * Set to draw a specific background pattern on the view.
+ *
+ * Since: 3.16
+ */
+ g_object_class_install_property (object_class,
+ PROP_BACKGROUND_PATTERN,
+ g_param_spec_enum ("background-pattern",
+ "Background pattern",
+ "Set to draw a specific background pattern on the
view",
+ GTK_SOURCE_TYPE_BACKGROUND_PATTERN_TYPE,
+ 0,
+ G_PARAM_READWRITE));
+
signals [UNDO] =
g_signal_new ("undo",
G_TYPE_FROM_CLASS (klass),
@@ -942,6 +962,11 @@ gtk_source_view_set_property (GObject *object,
g_value_get_flags (value));
break;
+ case PROP_BACKGROUND_PATTERN:
+ gtk_source_view_set_background_pattern (view,
+ g_value_get_enum (value));
+ break;
+
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@@ -1026,6 +1051,11 @@ gtk_source_view_get_property (GObject *object,
gtk_source_view_get_draw_spaces (view));
break;
+ case PROP_BACKGROUND_PATTERN:
+ g_value_set_enum (value,
+ gtk_source_view_get_background_pattern (view));
+ break;
+
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@@ -2667,6 +2697,77 @@ gtk_source_view_draw_layer (GtkTextView *text_view,
}
}
+ if (view->priv->background_pattern != GTK_SOURCE_BACKGROUND_PATTERN_TYPE_NONE)
+ {
+ GdkRectangle clip;
+ GdkRectangle vis;
+ gdouble x;
+ gdouble y;
+ PangoContext *context;
+ PangoLayout *layout;
+ int grid_width = 16;
+ int grid_height = 16;
+
+ context = gtk_widget_get_pango_context (GTK_WIDGET (view));
+ layout = pango_layout_new (context);
+ pango_layout_set_text (layout, "X", 1);
+ pango_layout_get_pixel_size (layout, &grid_width, &grid_height);
+ g_object_unref (layout);
+
+ /* each character becomes 2 stacked boxes. */
+ grid_height /= 2;
+
+ cairo_save (cr);
+ cairo_set_line_width (cr, 1.0);
+ gdk_cairo_get_clip_rectangle (cr, &clip);
+ gtk_text_view_get_visible_rect (text_view, &vis);
+
+ if (view->priv->background_pattern_color_set)
+ {
+ gdk_cairo_set_source_rgba (cr, &view->priv->background_pattern_color);
+ }
+ else
+ {
+ GtkStyleContext *context;
+ GtkStateFlags state;
+ GdkRGBA color;
+
+ context = gtk_widget_get_style_context (widget);
+ state = gtk_widget_get_state_flags (widget);
+ gtk_style_context_get_background_color (context, state, &color);
+
+ /* make the color darker */
+ color.red *= 0.99;
+ color.blue *= 0.99;
+ color.green *= 0.99;
+
+ gdk_cairo_set_source_rgba (cr, &color);
+ }
+
+ /*
+ * The following constants come from gtktextview.c pixel cache
+ * settings. Sadly, I didn't expose those in public API so we have to
+ * just keep them in sync here. 64 for X, height/2 for Y.
+ */
+ x = (grid_width - (vis.x % grid_width)) - (64 / grid_width * grid_width) - grid_width
+ 2;
+ y = (grid_height - (vis.y % grid_height)) - (vis.height / 2 / grid_height *
grid_height) - grid_height;
+
+ for (; x <= clip.x + clip.width; x += grid_width)
+ {
+ cairo_move_to (cr, x + .5, clip.y - .5);
+ cairo_line_to (cr, x + .5, clip.y + clip.height - .5);
+ }
+
+ for (; y <= clip.y + clip.height; y += grid_height)
+ {
+ cairo_move_to (cr, clip.x + .5, y - .5);
+ cairo_line_to (cr, clip.x + clip.width + .5, y - .5);
+ }
+
+ cairo_stroke (cr);
+ cairo_restore (cr);
+ }
+
gtk_source_view_paint_marks_background (view, cr);
}
@@ -4294,6 +4395,17 @@ gtk_source_view_style_updated (GtkWidget *widget)
}
static void
+update_background_pattern_color (GtkSourceView *view)
+{
+ if (view->priv->style_scheme)
+ {
+ view->priv->background_pattern_color_set =
+ _gtk_source_style_scheme_get_background_pattern_color (view->priv->style_scheme,
+
&view->priv->background_pattern_color);
+ }
+}
+
+static void
update_current_line_color (GtkSourceView *view)
{
if (view->priv->style_scheme)
@@ -4445,6 +4557,7 @@ gtk_source_view_realize (GtkWidget *widget)
view->priv->style_scheme_applied = TRUE;
}
+ update_background_pattern_color (view);
update_current_line_color (view);
update_right_margin_colors (view);
update_spaces_color (view);
@@ -4484,6 +4597,7 @@ gtk_source_view_update_style_scheme (GtkSourceView *view)
if (gtk_widget_get_realized (GTK_WIDGET (view)))
{
_gtk_source_style_scheme_apply (new_scheme, GTK_WIDGET (view));
+ update_background_pattern_color (view);
update_current_line_color (view);
update_right_margin_colors (view);
update_spaces_color (view);
@@ -4646,3 +4760,48 @@ gtk_source_view_get_mark_attributes (GtkSourceView *view,
}
return NULL;
}
+
+/**
+ * gtk_source_view_set_background_pattern:
+ * @view: a #GtkSourceView.
+ * @background_pattern: #GtkSourceBackgroundPatternType specifing how
+ * the background pattern should be be displayed.
+ *
+ * Set if and how the background pattern should be displayed.
+ *
+ * Since: 3.16
+ **/
+void
+gtk_source_view_set_background_pattern (GtkSourceView *view,
+ GtkSourceBackgroundPatternType background_pattern)
+{
+ g_return_if_fail (GTK_SOURCE_IS_VIEW (view));
+
+ if (view->priv->background_pattern == background_pattern)
+ return;
+
+ view->priv->background_pattern = background_pattern;
+
+ gtk_widget_queue_draw (GTK_WIDGET (view));
+
+ g_object_notify (G_OBJECT (view), "background-pattern");
+}
+
+/**
+ * gtk_source_view_get_background_pattern:
+ * @view: a #GtkSourceView
+ *
+ * Returns the #GtkSourceBackgroundPatternType specifying if and how
+ * the background pattern should be displayed for this @view.
+ *
+ * Returns: the #GtkSourceBackgroundPatternType.
+ *
+ * Since: 3.16
+ **/
+GtkSourceBackgroundPatternType
+gtk_source_view_get_background_pattern (GtkSourceView *view)
+{
+ g_return_val_if_fail (GTK_SOURCE_IS_VIEW (view), 0);
+
+ return view->priv->background_pattern;
+}
diff --git a/gtksourceview/gtksourceview.h b/gtksourceview/gtksourceview.h
index 459d743..69bf664 100644
--- a/gtksourceview/gtksourceview.h
+++ b/gtksourceview/gtksourceview.h
@@ -216,5 +216,10 @@ GtkSourceCompletion *
GtkSourceGutter *gtk_source_view_get_gutter (GtkSourceView *view,
GtkTextWindowType window_type);
+void gtk_source_view_set_background_pattern (GtkSourceView *view,
+ GtkSourceBackgroundPatternType background_pattern);
+GtkSourceBackgroundPatternType
+ gtk_source_view_get_background_pattern (GtkSourceView *view);
+
G_END_DECLS
#endif /* end of SOURCE_VIEW_H__ */
diff --git a/tests/test-widget.c b/tests/test-widget.c
index 18f9a9a..2b06090 100644
--- a/tests/test-widget.c
+++ b/tests/test-widget.c
@@ -56,6 +56,7 @@ struct _TestWidgetPrivate
GtkSpinButton *indent_width_spinbutton;
GtkLabel *cursor_position_info;
GtkSourceStyleSchemeChooserButton *chooser_button;
+ GtkComboBoxText *background_pattern;
};
GType test_widget_get_type (void);
@@ -917,6 +918,26 @@ add_source_mark_attributes (GtkSourceView *view)
}
static void
+on_background_pattern_changed (GtkComboBox *combobox,
+ TestWidget *self)
+{
+ gchar *text;
+
+ text = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (combobox));
+
+ if (g_str_equal (text, "Grid"))
+ {
+ gtk_source_view_set_background_pattern (self->priv->view,
+ GTK_SOURCE_BACKGROUND_PATTERN_TYPE_GRID);
+ }
+ else
+ {
+ gtk_source_view_set_background_pattern (self->priv->view,
+ GTK_SOURCE_BACKGROUND_PATTERN_TYPE_NONE);
+ }
+}
+
+static void
test_widget_dispose (GObject *object)
{
TestWidget *self = TEST_WIDGET (object);
@@ -961,6 +982,7 @@ test_widget_class_init (TestWidgetClass *klass)
gtk_widget_class_bind_template_child_private (widget_class, TestWidget, indent_width_spinbutton);
gtk_widget_class_bind_template_child_private (widget_class, TestWidget, cursor_position_info);
gtk_widget_class_bind_template_child_private (widget_class, TestWidget, chooser_button);
+ gtk_widget_class_bind_template_child_private (widget_class, TestWidget, background_pattern);
}
static void
@@ -1013,6 +1035,11 @@ test_widget_init (TestWidget *self)
"style-scheme",
G_BINDING_SYNC_CREATE);
+ g_signal_connect (self->priv->background_pattern,
+ "changed",
+ G_CALLBACK (on_background_pattern_changed),
+ self);
+
open_file (self, TOP_SRCDIR "/gtksourceview/gtksourcebuffer.c");
}
diff --git a/tests/test-widget.ui b/tests/test-widget.ui
index a254064..0578526 100644
--- a/tests/test-widget.ui
+++ b/tests/test-widget.ui
@@ -281,6 +281,21 @@
<property name="top_attach">0</property>
</packing>
</child>
+ <child>
+ <object class="GtkComboBoxText" id="background_pattern">
+ <property name="visible">True</property>
+ <property name="can_focus">False</property>
+ <property name="active">0</property>
+ <items>
+ <item translatable="yes">None</item>
+ <item translatable="yes">Grid</item>
+ </items>
+ </object>
+ <packing>
+ <property name="left_attach">2</property>
+ <property name="top_attach">0</property>
+ </packing>
+ </child>
</object>
<packing>
<property name="left_attach">0</property>
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