132 lines
4.6 KiB
C
132 lines
4.6 KiB
C
#include <gtk/gtk.h>
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static gboolean
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overlay_get_child_position (GtkOverlay *overlay,
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GtkWidget *child,
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GdkRectangle *allocation,
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gpointer user_data)
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{
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GtkWidget *custom_child = user_data;
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GtkRequisition req;
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if (child != custom_child)
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return FALSE;
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gtk_widget_get_preferred_size (child, NULL, &req);
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allocation->x = 120;
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allocation->y = 0;
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allocation->width = req.width;
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allocation->height = req.height;
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return TRUE;
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}
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int
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main (int argc, char *argv[])
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{
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GtkWidget *win, *overlay, *grid, *main_child, *child, *label, *sw;
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GtkCssProvider *provider;
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char *str;
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gtk_init ();
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provider = gtk_css_provider_new ();
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gtk_css_provider_load_from_string (provider,
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"label { border: 3px solid black; border-radius: 5px; padding: 2px; }"
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".top { border-top-style: none; border-top-right-radius: 0px; border-top-left-radius: 0px; }"
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".bottom { border-bottom-style: none; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; }"
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".left { border-left-style: none; border-top-left-radius: 0px; border-bottom-left-radius: 0px; }"
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".right { border-right-style: none; border-top-right-radius: 0px; border-bottom-right-radius: 0px; }");
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gtk_style_context_add_provider_for_display (gdk_display_get_default (),
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GTK_STYLE_PROVIDER (provider),
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GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
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win = gtk_window_new ();
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gtk_window_set_default_size (GTK_WINDOW (win), 600, 600);
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grid = gtk_grid_new ();
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label = gtk_label_new ("Out of overlay");
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gtk_widget_set_hexpand (label, TRUE);
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gtk_widget_set_vexpand (label, TRUE);
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gtk_grid_attach (GTK_GRID (grid), label, 0, 0, 1, 1);
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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_ALWAYS,
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GTK_POLICY_ALWAYS);
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gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
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main_child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), main_child);
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gtk_widget_set_hexpand (main_child, TRUE);
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gtk_widget_set_vexpand (main_child, TRUE);
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label = gtk_label_new ("Main child");
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gtk_widget_set_halign (label, GTK_ALIGN_CENTER);
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gtk_widget_set_valign (label, GTK_ALIGN_CENTER);
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gtk_box_append (GTK_BOX (main_child), label);
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child = gtk_label_new (NULL);
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str = g_strdup_printf ("%p", child);
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gtk_label_set_text (GTK_LABEL (child), str);
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g_free (str);
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g_print ("Bottom/Right child: %p\n", child);
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gtk_widget_set_halign (child, GTK_ALIGN_END);
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gtk_widget_set_valign (child, GTK_ALIGN_END);
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
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child = gtk_label_new (NULL);
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str = g_strdup_printf ("%p", child);
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gtk_label_set_text (GTK_LABEL (child), str);
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g_free (str);
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g_print ("Left/Top child: %p\n", child);
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gtk_widget_set_halign (child, GTK_ALIGN_START);
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gtk_widget_set_valign (child, GTK_ALIGN_START);
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
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child = gtk_label_new (NULL);
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str = g_strdup_printf ("%p", child);
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gtk_label_set_text (GTK_LABEL (child), str);
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g_free (str);
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g_print ("Right/Center child: %p\n", child);
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gtk_widget_set_halign (child, GTK_ALIGN_END);
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gtk_widget_set_valign (child, GTK_ALIGN_CENTER);
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
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child = gtk_label_new (NULL);
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str = g_strdup_printf ("%p", child);
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gtk_label_set_text (GTK_LABEL (child), str);
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g_free (str);
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gtk_widget_set_margin_start (child, 55);
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gtk_widget_set_margin_top (child, 4);
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g_print ("Left/Top margined child: %p\n", child);
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gtk_widget_set_halign (child, GTK_ALIGN_START);
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gtk_widget_set_valign (child, GTK_ALIGN_START);
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
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child = gtk_label_new (NULL);
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str = g_strdup_printf ("%p", child);
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gtk_label_set_text (GTK_LABEL (child), str);
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g_free (str);
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g_print ("Custom get-child-position child: %p\n", child);
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gtk_widget_set_halign (child, GTK_ALIGN_START);
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gtk_widget_set_valign (child, GTK_ALIGN_START);
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
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g_signal_connect (overlay, "get-child-position",
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G_CALLBACK (overlay_get_child_position), child);
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gtk_grid_attach (GTK_GRID (grid), overlay, 1, 0, 1, 3);
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gtk_window_set_child (GTK_WINDOW (win), grid);
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g_print ("\n");
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gtk_window_present (GTK_WINDOW (win));
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while (TRUE)
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g_main_context_iteration (NULL, TRUE);
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return 0;
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}
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