Implement property editing

1 files changed, 156 insertions, 6 deletions

diff --git a/test/control.c b/test/control.c
index 0614071..a5a4e22 100644
--- a/test/control.c
+++ b/test/control.c
@@ -18,9 +18,11 @@
 #include <glib/gprintf.h>
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
+#include <gdk/gdkkeysyms.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
+#include <errno.h>
 #include "uca-camera.h"
 
 
@@ -31,6 +33,7 @@ typedef struct {
     guchar *buffer, *pixels;
     GdkPixbuf *pixbuf;
     GtkWidget *image;
+    GtkTreeModel *property_model;
     UcaCamera *camera;
 
     GtkStatusbar *statusbar;
@@ -51,8 +54,6 @@ typedef struct {
 enum {
     COLUMN_NAME = 0,
     COLUMN_VALUE,
-    COLUMN_UNIT,
-    COLUMN_UCA_ID,
     NUM_COLUMNS
 };
 
@@ -145,7 +146,7 @@ void on_adjustment_scale_value_changed(GtkAdjustment* adjustment, gpointer user_
     data->scale = gtk_adjustment_get_value(adjustment);
 }
 
-void on_toolbutton_run_clicked(GtkWidget *widget, gpointer args)
+static void on_toolbutton_run_clicked(GtkWidget *widget, gpointer args)
 {
     ThreadData *data = (ThreadData *) args;
 
@@ -168,7 +169,7 @@ void on_toolbutton_run_clicked(GtkWidget *widget, gpointer args)
     }
 }
 
-void on_toolbutton_stop_clicked(GtkWidget *widget, gpointer args)
+static void on_toolbutton_stop_clicked(GtkWidget *widget, gpointer args)
 {
     ThreadData *data = (ThreadData *) args;
     data->running = FALSE;
@@ -176,7 +177,7 @@ void on_toolbutton_stop_clicked(GtkWidget *widget, gpointer args)
     uca_camera_stop_recording(data->camera, NULL);
 }
 
-void on_toolbutton_record_clicked(GtkWidget *widget, gpointer args)
+static void on_toolbutton_record_clicked(GtkWidget *widget, gpointer args)
 {
     ThreadData *data = (ThreadData *) args;
     data->timestamp = (int) time(0);
@@ -187,7 +188,7 @@ void on_toolbutton_record_clicked(GtkWidget *widget, gpointer args)
     
     if (data->running != TRUE) {
         data->running = TRUE;
-        uca_camera_start_recording(data->cam, &error);
+        uca_camera_start_recording(data->camera, &error);
 
         if (!g_thread_create(grab_thread, data, FALSE, &error)) {
             g_printerr("Failed to create thread: %s\n", error->message);
@@ -195,6 +196,142 @@ void on_toolbutton_record_clicked(GtkWidget *widget, gpointer args)
     }
 }
 
+static void on_valuecell_edited(GtkCellRendererText *renderer, gchar *path, gchar *new_text, gpointer data)
+{
+    ThreadData *td = (ThreadData *) data;
+    GtkTreePath *tree_path = gtk_tree_path_new_from_string(path);
+    GtkTreeIter iter;
+
+    if (gtk_tree_model_get_iter(td->property_model, &iter, tree_path)) {
+        gchar *propname;
+        GValue dest_value = {0}, src_value = {0};
+        g_value_init(&src_value, G_TYPE_STRING);
+        g_value_set_string(&src_value, new_text);
+
+        gtk_tree_model_get(td->property_model, &iter, COLUMN_NAME, &propname, -1);
+
+        GParamSpec *spec = g_object_class_find_property(G_OBJECT_GET_CLASS(td->camera), propname);
+        g_value_init(&dest_value, spec->value_type);
+        errno = 0;
+
+        if (g_value_transform(&src_value, &dest_value) && (errno != EINVAL)) {
+            g_object_set_property(G_OBJECT(td->camera), propname, &dest_value);
+            g_object_get_property(G_OBJECT(td->camera), propname, &src_value);
+            gtk_list_store_set(GTK_LIST_STORE(td->property_model), &iter, COLUMN_VALUE, g_value_get_string(&src_value), -1);
+        }
+        else
+            g_print("Couldn't transform %s\n", g_value_get_string(&src_value));
+    }
+}
+
+static void value_cell_data_func(GtkTreeViewColumn *column, GtkCellRenderer *cell, GtkTreeModel *model, GtkTreeIter *iter, gpointer data)
+{
+    UcaCamera *camera = UCA_CAMERA(data);
+    gchar *propname;
+    gtk_tree_model_get(model, iter, COLUMN_NAME, &propname, -1);
+    GParamSpec *spec = g_object_class_find_property(G_OBJECT_GET_CLASS(camera), propname);
+
+    if (spec->flags & G_PARAM_WRITABLE) {
+        g_object_set(cell,
+                "mode", GTK_CELL_RENDERER_MODE_EDITABLE,
+                "editable", TRUE,
+                "style", PANGO_STYLE_NORMAL,
+                "foreground", "#000000",
+                NULL); 
+    }
+    else {
+        g_object_set(cell,
+                "mode", GTK_CELL_RENDERER_MODE_INERT,
+                "editable", FALSE,
+                "foreground", "#aaaaaa",
+                NULL); 
+    }
+
+    g_free(propname);
+}
+
+static void populate_property_list(GtkBuilder *builder, UcaCamera *camera)
+{
+    GtkTreeViewColumn *value_column = GTK_TREE_VIEW_COLUMN(gtk_builder_get_object(builder, "valuecolumn"));
+    GtkCellRendererText *value_renderer = GTK_CELL_RENDERER_TEXT(gtk_builder_get_object(builder, "valuecell"));
+    GtkListStore *list_store = GTK_LIST_STORE(gtk_builder_get_object(builder, "camera-properties"));
+    GtkTreeIter iter;
+
+    gtk_tree_view_column_set_cell_data_func(value_column, GTK_CELL_RENDERER(value_renderer), value_cell_data_func, camera, NULL);
+
+    GObjectClass *oclass = G_OBJECT_GET_CLASS(camera);
+    guint num_specs = 0;
+    GParamSpec **specs = g_object_class_list_properties(oclass, &num_specs);
+    GValue dest_value = {0}, src_value = {0};
+    g_value_init(&dest_value, G_TYPE_STRING);
+
+    for (guint i = 0; i < num_specs; i++) {
+        gtk_list_store_append(list_store, &iter);
+        gtk_list_store_set(list_store, &iter, 0, specs[i]->name, -1);
+
+        if (specs[i]->flags & G_PARAM_READABLE) {
+            g_value_init(&src_value, specs[i]->value_type);
+            g_object_get_property(G_OBJECT(camera), specs[i]->name, &src_value);
+            if (g_value_transform(&src_value, &dest_value))
+                gtk_list_store_set(list_store, &iter, 1, g_value_get_string(&dest_value), -1);
+            g_value_unset(&src_value);
+        }
+    }
+
+    g_free(specs);
+}
+
+static void transform_string_to_boolean(const GValue *src_value, GValue *dest_value)
+{
+    const gchar *str = g_value_get_string(src_value);
+
+    if (g_ascii_strncasecmp(str, "TRUE", 4) == 0)
+        g_value_set_boolean(dest_value, TRUE);
+    else if (g_ascii_strncasecmp(str, "FALSE", 4) == 0)
+        g_value_set_boolean(dest_value, FALSE);
+}
+
+static void transform_string_to_uint(const GValue *src_value, GValue *dest_value)
+{
+    const gchar *str = g_value_get_string(src_value);
+    gchar *endptr = NULL;
+    guint64 result = g_ascii_strtoull(str, &endptr, 10);
+    if (endptr != str)
+        g_value_set_uint(dest_value, result);
+    else
+        errno = EINVAL;
+}
+
+static void transform_string_to_double(const GValue *src_value, GValue *dest_value)
+{
+    const gchar *str = g_value_get_string(src_value);
+    gchar *endptr = NULL;
+    gdouble result = g_ascii_strtod(str, &endptr);
+    if (endptr != str)
+        g_value_set_double(dest_value, result);
+    else
+        errno = EINVAL;
+}
+
+static void transform_string_to_float(const GValue *src_value, GValue *dest_value)
+{
+    const gchar *str = g_value_get_string(src_value);
+    gchar *endptr = NULL;
+    gdouble result = g_ascii_strtod(str, &endptr);
+    if (endptr != str)
+        g_value_set_float(dest_value, (gfloat) result);
+    else
+        errno = EINVAL;
+}
+
+static void register_transform_funcs(void)
+{
+    g_value_register_transform_func(G_TYPE_STRING, G_TYPE_BOOLEAN, &transform_string_to_boolean);
+    g_value_register_transform_func(G_TYPE_STRING, G_TYPE_UINT, &transform_string_to_uint);
+    g_value_register_transform_func(G_TYPE_STRING, G_TYPE_DOUBLE, &transform_string_to_double);
+    g_value_register_transform_func(G_TYPE_STRING, G_TYPE_FLOAT, &transform_string_to_float);
+}
+
 static void create_main_window(GtkBuilder *builder, const gchar* camera_name)
 {
     static ThreadData td;
@@ -219,6 +356,9 @@ static void create_main_window(GtkBuilder *builder, const gchar* camera_name)
     GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, td.width, td.height);
     gtk_image_set_from_pixbuf(GTK_IMAGE(image), pixbuf);
 
+    register_transform_funcs();
+    populate_property_list(builder, camera);
+
     td.pixel_size = bits_per_sample == 16 ? 2 : 1;
     td.image  = image;
     td.pixbuf = pixbuf;
@@ -230,6 +370,7 @@ static void create_main_window(GtkBuilder *builder, const gchar* camera_name)
     td.statusbar_context_id = gtk_statusbar_get_context_id(td.statusbar, "Recording Information");
     td.store = FALSE;
     td.camera = camera;
+    td.property_model = GTK_TREE_MODEL(gtk_builder_get_object(builder, "camera-properties"));
 
     g_signal_connect(window, "destroy", G_CALLBACK(on_destroy), &td);
     g_signal_connect(gtk_builder_get_object(builder, "toolbutton_run"),
@@ -238,6 +379,8 @@ static void create_main_window(GtkBuilder *builder, const gchar* camera_name)
             "clicked", G_CALLBACK(on_toolbutton_stop_clicked), &td);
     g_signal_connect(gtk_builder_get_object(builder, "toolbutton_record"),
             "clicked", G_CALLBACK(on_toolbutton_record_clicked), &td);
+    g_signal_connect(gtk_builder_get_object(builder, "valuecell"),
+            "edited", G_CALLBACK(on_valuecell_edited), &td);
 
     gtk_widget_show(image);
     gtk_widget_show(window);
@@ -268,6 +411,12 @@ static void on_button_proceed_clicked(GtkWidget *widget, gpointer data)
     g_list_free(selected_rows);
 }
 
+static void on_treeview_keypress(GtkWidget *widget, GdkEventKey *event, gpointer data)
+{
+    if (event->keyval == GDK_KEY_Return)
+        gtk_widget_grab_focus(GTK_WIDGET(data));
+}
+
 static void create_choice_window(GtkBuilder *builder)
 {
     gchar **camera_types = uca_camera_get_types();
@@ -293,6 +442,7 @@ static void create_choice_window(GtkBuilder *builder)
 
     g_strfreev(camera_types);
     g_signal_connect(proceed_button, "clicked", G_CALLBACK(on_button_proceed_clicked), builder);
+    g_signal_connect(treeview, "key-press-event", G_CALLBACK(on_treeview_keypress), proceed_button);
     gtk_widget_show_all(GTK_WIDGET(choice_window));
 }