Add a Qt I/O Graph dialog.

For each graph you can set:
- Its visibility
- A name
- A display filter
- Color, from a fixed list
- Plot style: Line, Impulse, Bar, Stacked Bar, Dot, Square, Diamond
- Basic Y Axes (packets/s, bytes/s, bits/s)
- Computed Y Axes (SUM, MIN, AVG, MAX)
- Smoothing

You can pan and zoom using the mouse and keyboard. Clicking on a graph
selects the last packet for that interval. If all graphs have the same Y
axis a single label is shown, otherwise a legend is shown.

The time scale (X axis) can be toggled between relative seconds and the
time of day.

Graphs can be saved as PDF, PNG, BMP, and JPEG. Settings are "sticky"
via the io_graphs UAT.

To do:
- Minimize graph drawing delays.
- Figure out why smoothing differs from GTK+
- Everything else at the top of io_graph_dialog.cpp
- Fix empty resets.

A fair amount of code was copied from TCPStreamDialog. We might want to
subclass QCustomPlot and place the shared code there.

Move common syntax checking to SyntaxLineEdit.

Move some common code from ui/gtk/io_stat.c to ui/io_graph_item.[ch] and
use it in both GTK+ and Qt.

Make the io_graph_item_t array allocation in io_stat.c static. The
behavior should be identical and this gives us additional compile-time
checks.

Change-Id: I9a3d544469b7048f0761fdbf7bcf20f44ae76577
Reviewed-on: https://code.wireshark.org/review/435
Reviewed-by: Gerald Combs <gerald@wireshark.org>
Tested-by: Gerald Combs <gerald@wireshark.org>

1 files changed, 152 insertions, 0 deletions

diff --git a/ui/io_graph_item.c b/ui/io_graph_item.c
new file mode 100644
index 0000000000..ae9bc0d3ce
--- /dev/null
+++ b/ui/io_graph_item.c
@@ -0,0 +1,152 @@
+/* io_graph_item.h
+ * Definitions and functions for IO graph items
+ *
+ * Copied from gtk/io_stat.c, (c) 2002 Ronnie Sahlberg
+ *
+ * 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 "config.h"
+
+#include <glib.h>
+
+#include <epan/epan_dissect.h>
+#include <epan/packet_info.h>
+
+#include "ui/io_graph_item.h"
+
+int get_io_graph_index(packet_info *pinfo, int interval) {
+    nstime_t time_delta;
+
+    /*
+     * Find in which interval this is supposed to go and store the interval index as idx
+     */
+    time_delta = pinfo->rel_ts;
+    if (time_delta.nsecs<0) {
+        time_delta.secs--;
+        time_delta.nsecs += 1000000000;
+    }
+    if (time_delta.secs<0) {
+        return -1;
+    }
+    return (int) ((time_delta.secs*1000 + time_delta.nsecs/1000000) / interval);
+}
+
+GString *check_field_unit(const char *field_name, int *hf_index, io_graph_item_unit_t item_unit)
+{
+    GString *err_str = NULL;
+    if (item_unit >= IOG_ITEM_UNIT_CALC_SUM) {
+        header_field_info *hfi;
+
+        const char *item_unit_names[NUM_IOG_ITEM_UNITS] = {
+            "Packets",
+            "Bytes",
+            "Bits",
+            "SUM",
+            "COUNT FRAMES",
+            "COUNT FIELDS",
+            "MAX",
+            "MIN",
+            "AVG",
+            "LOAD"
+        };
+
+        /* There was no field specified */
+        if ((field_name == NULL) || (field_name[0] == 0)) {
+            err_str = g_string_new("You didn't specify a field name.");
+            return err_str;
+        }
+
+        /* The field could not be found */
+        hfi = proto_registrar_get_byname(field_name);
+        if (hfi == NULL) {
+            err_str = g_string_new("");
+            g_string_printf(err_str, "There is no field named '%s'.", field_name);
+            return err_str;
+        }
+
+        if (hf_index) *hf_index = hfi->id;
+
+        /* Check that the type is compatible */
+        switch (hfi->type) {
+        case FT_UINT8:
+        case FT_UINT16:
+        case FT_UINT24:
+        case FT_UINT32:
+        case FT_UINT64:
+        case FT_INT8:
+        case FT_INT16:
+        case FT_INT24:
+        case FT_INT32:
+        case FT_INT64:
+        case FT_FLOAT:
+        case FT_DOUBLE:
+            /* These values support all calculations except LOAD */
+            switch (item_unit) {
+            case IOG_ITEM_UNIT_CALC_LOAD:
+                err_str = g_string_new("LOAD is only supported for relative-time fields.");
+            default:
+                break;
+            }
+            /* These types support all calculations */
+            break;
+        case FT_RELATIVE_TIME:
+            /* This type only supports COUNT, MAX, MIN, AVG */
+            switch (item_unit) {
+            case IOG_ITEM_UNIT_CALC_SUM:
+            case IOG_ITEM_UNIT_CALC_FRAMES:
+            case IOG_ITEM_UNIT_CALC_FIELDS:
+            case IOG_ITEM_UNIT_CALC_MAX:
+            case IOG_ITEM_UNIT_CALC_MIN:
+            case IOG_ITEM_UNIT_CALC_AVERAGE:
+            case IOG_ITEM_UNIT_CALC_LOAD:
+                break;
+            default:
+                err_str = g_string_new("");
+                g_string_printf(err_str, "\"%s\" is a relative-time field. %s calculations are not supported on it.",
+                    field_name,
+                    item_unit_names[item_unit]);
+            }
+            break;
+        default:
+            if ((item_unit != IOG_ITEM_UNIT_CALC_FRAMES) &&
+                (item_unit != IOG_ITEM_UNIT_CALC_FIELDS)) {
+                err_str = g_string_new("");
+                g_string_printf(err_str, "\"%s\" doesn't have integral or float values. %s calculations are not supported on it.",
+                    field_name,
+                    item_unit_names[item_unit]);
+            }
+            break;
+        }
+    }
+    return err_str;
+}
+
+/*
+ * 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:
+ */