Qt: Move utils to separate utils directory

Following the move for widgets directory, moving utils
to the utils directory. Guidelines for this directory are:

 - Generic use but not a widget
 - Utility functionality used by many classes
 
 Note: additionally all includes affected by this move have been changed
 to absolute path includes, instead of relative ones.

Change-Id: I019ae4b6e6f6d06a5745a63ed195edbd36fb936b
Reviewed-on: https://code.wireshark.org/review/22602
Petri-Dish: Roland Knall <rknall@gmail.com>
Reviewed-by: Roland Knall <rknall@gmail.com>

1 files changed, 172 insertions, 0 deletions

diff --git a/ui/qt/utils/color_utils.cpp b/ui/qt/utils/color_utils.cpp
new file mode 100644
index 0000000000..907adc8afe
--- /dev/null
+++ b/ui/qt/utils/color_utils.cpp
@@ -0,0 +1,172 @@
+/* color_utils.cpp
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <ui/qt/utils/color_utils.h>
+#include <ui/qt/utils/tango_colors.h>
+
+// Colors we use in various parts of the UI.
+//
+// New colors should be chosen from tango_colors.h. The expert and hidden
+// colors come from the GTK+ UI and are grandfathered in.
+//
+// At some point we should probably make these configurable along with the
+// graph and sequence colors.
+
+const QColor ColorUtils::expert_color_comment    = QColor ( 0xb7, 0xf7, 0x74 );        /* Green */
+const QColor ColorUtils::expert_color_chat       = QColor ( 0x80, 0xb7, 0xf7 );        /* Light blue */
+const QColor ColorUtils::expert_color_note       = QColor ( 0xa0, 0xff, 0xff );        /* Bright turquoise */
+const QColor ColorUtils::expert_color_warn       = QColor ( 0xf7, 0xf2, 0x53 );        /* Yellow */
+const QColor ColorUtils::expert_color_error      = QColor ( 0xff, 0x5c, 0x5c );        /* Pale red */
+const QColor ColorUtils::expert_color_foreground = QColor ( 0x00, 0x00, 0x00 );        /* Black */
+const QColor ColorUtils::hidden_proto_item       = QColor ( 0x44, 0x44, 0x44 );        /* Gray */
+
+const QRgb ColorUtils::byte_view_hover_bg_ = tango_butter_2;
+const QRgb ColorUtils::byte_view_hover_fg_ = tango_sky_blue_5;
+
+ColorUtils::ColorUtils(QObject *parent) :
+    QObject(parent)
+{
+}
+
+QColor ColorUtils::byteViewHoverColor(bool background)
+{
+	return QColor(background ? byte_view_hover_bg_ : byte_view_hover_fg_);
+}
+
+//
+// A color_t has RGB values in [0,65535].
+// Qt RGB colors have RGB values in [0,255].
+//
+// 65535/255 = 257 = 0x0101, so converting from [0,255] to
+// [0,65535] involves just shifting the 8-bit value left 8 bits
+// and ORing them together.
+//
+// Converting from [0,65535] to [0,255] without rounding involves
+// just shifting the 16-bit value right 8 bits; I guess you could
+// round them by adding 0x80 to the value before shifting.
+//
+QColor ColorUtils::fromColorT (const color_t *color) {
+    if (!color) return QColor();
+    // Convert [0,65535] values to [0,255] values
+    return QColor(color->red >> 8, color->green >> 8, color->blue >> 8);
+}
+
+QColor ColorUtils::fromColorT(color_t color)
+{
+    return fromColorT(&color);
+}
+
+const color_t ColorUtils::toColorT(const QColor color)
+{
+    color_t colort;
+
+    // Convert [0,255] values to [0,65535] values
+    colort.red = (color.red() << 8) | color.red();
+    colort.green = (color.green() << 8) | color.green();
+    colort.blue = (color.blue() << 8) | color.blue();
+
+    return colort;
+}
+
+QRgb ColorUtils::alphaBlend(const QColor &color1, const QColor &color2, qreal alpha)
+{
+    alpha = qBound(qreal(0.0), alpha, qreal(1.0));
+
+    int r1 = color1.red() * alpha;
+    int g1 = color1.green() * alpha;
+    int b1 = color1.blue() * alpha;
+    int r2 = color2.red() * (1 - alpha);
+    int g2 = color2.green() * (1 - alpha);
+    int b2 = color2.blue() * (1 - alpha);
+
+    QColor alpha_color(r1 + r2, g1 + g2, b1 + b2);
+    return alpha_color.rgb();
+}
+
+QRgb ColorUtils::alphaBlend(const QBrush &brush1, const QBrush &brush2, qreal alpha)
+{
+    return alphaBlend(brush1.color(), brush2.color(), alpha);
+}
+
+QList<QRgb> ColorUtils::graph_colors_;
+const QList<QRgb> ColorUtils::graphColors()
+{
+    if (graph_colors_.isEmpty()) {
+        // Available graph colors
+        // XXX - Add custom
+        graph_colors_ = QList<QRgb>()
+                << tango_aluminium_6 // Bar outline (use black instead)?
+                << tango_sky_blue_5
+                << tango_butter_6
+                << tango_chameleon_5
+                << tango_scarlet_red_5
+                << tango_plum_5
+                << tango_orange_6
+                << tango_aluminium_3
+                << tango_sky_blue_3
+                << tango_butter_3
+                << tango_chameleon_3
+                << tango_scarlet_red_3
+                << tango_plum_3
+                << tango_orange_3;
+    }
+    return graph_colors_;
+}
+
+QRgb ColorUtils::graphColor(int item)
+{
+    if (graph_colors_.isEmpty()) graphColors(); // Init list.
+    return graph_colors_[item % graph_colors_.size()];
+}
+
+QList<QRgb> ColorUtils::sequence_colors_;
+QRgb ColorUtils::sequenceColor(int item)
+{
+    if (sequence_colors_.isEmpty()) {
+        // Available sequence colors. Copied from gtk/graph_analysis.c.
+        // XXX - Add custom?
+        sequence_colors_ = QList<QRgb>()
+                << qRgb(144, 238, 144)
+                << qRgb(255, 160, 123)
+                << qRgb(255, 182, 193)
+                << qRgb(250, 250, 210)
+                << qRgb(255, 255, 52)
+                << qRgb(103, 205, 170)
+                << qRgb(224, 255, 255)
+                << qRgb(176, 196, 222)
+                << qRgb(135, 206, 254)
+                << qRgb(211, 211, 211);
+    }
+    return sequence_colors_[item % sequence_colors_.size()];
+}
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */