103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
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/* Overlay/Decorative Overlay
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* #Keywords: GtkOverlay
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*
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* Another example of an overlay with some decorative
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* and some interactive controls.
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*/
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#include <gtk/gtk.h>
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static GtkTextTag *tag;
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static void
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margin_changed (GtkAdjustment *adjustment,
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GtkTextView *text)
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{
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int value;
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value = (int)gtk_adjustment_get_value (adjustment);
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gtk_text_view_set_left_margin (GTK_TEXT_VIEW (text), value);
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g_object_set (tag, "pixels-above-lines", value, NULL);
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}
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GtkWidget *
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do_overlay_decorative (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkWidget *overlay;
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GtkWidget *sw;
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GtkWidget *text;
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GtkWidget *image;
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GtkWidget *scale;
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GtkTextBuffer *buffer;
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GtkTextIter start, end;
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GtkAdjustment *adjustment;
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window = gtk_window_new ();
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gtk_window_set_default_size (GTK_WINDOW (window), 500, 510);
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gtk_window_set_title (GTK_WINDOW (window), "Decorative Overlay");
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overlay = gtk_overlay_new ();
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sw = gtk_scrolled_window_new ();
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
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GTK_POLICY_AUTOMATIC,
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GTK_POLICY_AUTOMATIC);
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text = gtk_text_view_new ();
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
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gtk_text_buffer_set_text (buffer, "Dear diary...", -1);
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tag = gtk_text_buffer_create_tag (buffer, "top-margin",
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"pixels-above-lines", 0,
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NULL);
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gtk_text_buffer_get_start_iter (buffer, &start);
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end = start;
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gtk_text_iter_forward_word_end (&end);
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gtk_text_buffer_apply_tag (buffer, tag, &start, &end);
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gtk_window_set_child (GTK_WINDOW (window), overlay);
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gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), text);
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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image = gtk_picture_new_for_resource ("/overlay2/decor1.png");
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), image);
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gtk_widget_set_can_target (image, FALSE);
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gtk_widget_set_halign (image, GTK_ALIGN_START);
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gtk_widget_set_valign (image, GTK_ALIGN_START);
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image = gtk_picture_new_for_resource ("/overlay2/decor2.png");
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), image);
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gtk_widget_set_can_target (image, FALSE);
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gtk_widget_set_halign (image, GTK_ALIGN_END);
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gtk_widget_set_valign (image, GTK_ALIGN_END);
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adjustment = gtk_adjustment_new (0, 0, 100, 1, 1, 0);
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g_signal_connect (adjustment, "value-changed",
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G_CALLBACK (margin_changed), text);
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scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment);
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gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
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gtk_widget_set_size_request (scale, 120, -1);
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gtk_widget_set_margin_start (scale, 20);
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gtk_widget_set_margin_end (scale, 20);
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gtk_widget_set_margin_bottom (scale, 20);
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), scale);
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gtk_widget_set_halign (scale, GTK_ALIGN_START);
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gtk_widget_set_valign (scale, GTK_ALIGN_END);
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gtk_widget_set_tooltip_text (scale, "Margin");
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gtk_adjustment_set_value (adjustment, 100);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_set_visible (window, TRUE);
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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