display: Switch to a toggle buttons design for scale
The slider design wasn't fit for this since we allow only a finite set of scales.
This commit is contained in:
Rui Matos
parent
c50062a48b
commit
7c7c0b75d5
1 changed files with 108 additions and 69 deletions
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@ -1078,46 +1078,6 @@ n_supported_scales (CcDisplayMode *mode)
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return n;
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}
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static void
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setup_scale_slider (GtkWidget *slider,
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CcDisplayMonitor *output)
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{
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CcDisplayMode *mode;
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const double *scales;
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double current_scale;
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int current_index = -1;
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guint i, n;
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mode = cc_display_monitor_get_mode (output);
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scales = cc_display_mode_get_supported_scales (mode);
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n = n_supported_scales (mode);
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gtk_range_set_range (GTK_RANGE (slider), 0, n-1);
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current_scale = cc_display_monitor_get_scale (output);
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gtk_scale_clear_marks (GTK_SCALE (slider));
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for (i = 0; i < n; ++i)
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{
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double integral;
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double fractional = modf (scales[i], &integral);
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gchar *s = NULL;
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if (scales[i] == current_scale || (current_index < 0 && scales[i] == 1.0))
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current_index = i;
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if (fractional != 0)
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s = NULL;
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else
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s = g_strdup_printf ("%d", (int) integral);
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gtk_scale_add_mark (GTK_SCALE (slider), i, GTK_POS_TOP, s);
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g_free (s);
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}
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gtk_range_set_value (GTK_RANGE (slider), current_index);
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}
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static gboolean
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should_show_scale_row (CcDisplayMonitor *output)
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{
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@ -1135,52 +1095,131 @@ scale_row_sync_visibility (GtkWidget *row,
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gtk_widget_show (row);
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}
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static double
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scale_slider_get_selected_scale (GtkRange *slider,
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CcDisplayPanel *panel)
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static void
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scale_buttons_active (CcDisplayPanel *panel,
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GParamSpec *pspec,
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GtkWidget *button)
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{
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CcDisplayPanelPrivate *priv = panel->priv;
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CcDisplayMode *mode = cc_display_monitor_get_mode (priv->current_output);
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const double *scales = cc_display_mode_get_supported_scales (mode);
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int selected = gtk_range_get_value (slider);
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double scale = *(double*) g_object_get_data (G_OBJECT (button), "scale");
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g_return_val_if_fail (selected < n_supported_scales (mode), 1.0);
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
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{
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cc_display_monitor_set_scale (panel->priv->current_output, scale);
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update_apply_button (panel);
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}
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}
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return scales[selected];
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static GtkWidget *
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make_label_for_scale (double scale)
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{
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gchar *text = g_strdup_printf (" %d%% ", (int) round (scale*100));
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GtkWidget *label = gtk_label_new (text);
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g_free (text);
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return label;
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}
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#define MAX_N_SCALES 5
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static void
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get_display_scales (CcDisplayMonitor *output,
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double *scales)
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{
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CcDisplayMode *mode;
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const double *all_scales;
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double preferred;
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double increment;
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guint n, i, j;
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mode = cc_display_monitor_get_mode (output);
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all_scales = cc_display_mode_get_supported_scales (mode);
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n = n_supported_scales (mode);
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if (n <= MAX_N_SCALES)
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{
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memcpy (scales, all_scales, n * sizeof (double));
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return;
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}
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preferred = cc_display_mode_get_preferred_scale (mode);
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increment = (all_scales[n - 1] - all_scales[0]) / (double) (MAX_N_SCALES - 1);
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scales[0] = all_scales[0];
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for (i = j = 1; i < n && j < MAX_N_SCALES; i++)
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if (all_scales[i] >= scales[0] + increment*j || all_scales[i] == preferred)
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scales[j++] = all_scales[i];
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}
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static void
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scale_slider_changed (GtkRange *slider,
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CcDisplayPanel *panel)
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setup_scale_buttons (GtkWidget *bbox,
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CcDisplayMonitor *output)
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{
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cc_display_monitor_set_scale (panel->priv->current_output,
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scale_slider_get_selected_scale (slider, panel));
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update_apply_button (panel);
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CcDisplayPanel *panel;
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GtkRadioButton *group;
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double scales[MAX_N_SCALES + 1] = { 0 };
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double *scale;
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panel = g_object_get_data (G_OBJECT (bbox), "panel");
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gtk_container_foreach (GTK_CONTAINER (bbox), (GtkCallback) gtk_widget_destroy, NULL);
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get_display_scales (output, scales);
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group = NULL;
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for (scale = scales; *scale != 0.0; scale++)
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{
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GtkWidget *button = gtk_radio_button_new_from_widget (group);
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gtk_button_set_image (GTK_BUTTON (button), make_label_for_scale (*scale));
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gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (button), FALSE);
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g_object_set_data_full (G_OBJECT (button), "scale", g_memdup (scale, sizeof (double)), g_free);
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g_signal_connect_object (button, "notify::active", G_CALLBACK (scale_buttons_active),
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panel, G_CONNECT_SWAPPED);
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gtk_container_add (GTK_CONTAINER (bbox), button);
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group = GTK_RADIO_BUTTON (button);
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}
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gtk_widget_show_all (bbox);
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}
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#undef MAX_N_SCALES
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static void
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scale_buttons_sync (GtkWidget *bbox,
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CcDisplayMonitor *output)
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{
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GList *children, *l;
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children = gtk_container_get_children (GTK_CONTAINER (bbox));
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for (l = children; l; l = l->next)
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{
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GtkWidget *button = l->data;
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double scale = *(double*) g_object_get_data (G_OBJECT (button), "scale");
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if (scale == cc_display_monitor_get_scale (output))
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
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}
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g_list_free (children);
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}
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static GtkWidget *
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make_scale_row (CcDisplayPanel *panel, CcDisplayMonitor *output)
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{
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GtkWidget *row, *slider;
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GtkWidget *row, *bbox, *label;
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slider = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, NULL);
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gtk_widget_set_size_request (slider, 200, -1);
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label = gtk_label_new (_("Scale"));
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g_signal_connect_object (slider, "value-changed",
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G_CALLBACK (scale_slider_changed), panel, 0);
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bbox = gtk_button_box_new (GTK_ORIENTATION_HORIZONTAL);
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gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_EXPAND);
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gtk_scale_set_draw_value (GTK_SCALE (slider), FALSE);
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gtk_scale_set_has_origin (GTK_SCALE (slider), FALSE);
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gtk_scale_set_digits (GTK_SCALE (slider), 0);
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gtk_range_set_increments (GTK_RANGE (slider), 1, 1);
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row = make_row (NULL, label, bbox);
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setup_scale_slider (slider, output);
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g_object_set_data (G_OBJECT (bbox), "panel", panel);
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g_signal_connect_object (output, "mode", G_CALLBACK (setup_scale_buttons),
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bbox, G_CONNECT_SWAPPED);
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setup_scale_buttons (bbox, output);
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row = make_row (panel->priv->rows_size_group, gtk_label_new (_("Scale")), slider);
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gtk_widget_set_margin_top (gtk_bin_get_child (GTK_BIN (row)), 0);
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gtk_widget_set_margin_bottom (gtk_bin_get_child (GTK_BIN (row)), 0);
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g_signal_connect_object (output, "mode", G_CALLBACK (setup_scale_slider),
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slider, G_CONNECT_SWAPPED);
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g_signal_connect_object (output, "scale", G_CALLBACK (scale_buttons_sync),
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bbox, G_CONNECT_SWAPPED);
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scale_buttons_sync (bbox, output);
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gtk_widget_show_all (row);
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gtk_widget_set_no_show_all (row, TRUE);
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