gtk2/tests/testoverlay.c

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C
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#include <string.h>
#include <gtk/gtk.h>
static const char *css =
".overlay-green {"
" background-image: none;"
" background-color: green;"
"}\n"
".overlay-white {"
" background-image: none;"
" background-color: white;"
"}\n"
".transparent-red {"
" background-image: none;"
" background-color: rgba(255, 0, 0, 0.8);"
"}\n"
".transparent-green {"
" background-image: none;"
" background-color: rgba(0, 255, 0, 0.8);"
"}\n"
".transparent-blue {"
" background-image: none;"
" background-color: rgba(0, 0, 255, 0.8);"
"}\n"
".transparent-purple {"
" background-image: none;"
" background-color: rgba(255, 0, 255, 0.8);"
"}\n"
;
/* test that margins and non-zero allocation x/y
* of the main widget are handled correctly
*/
static GtkWidget *
test_nonzerox (void)
{
GtkWidget *win;
GtkWidget *grid;
GtkWidget *overlay;
GtkWidget *text;
GtkWidget *child;
win = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (win), "Non-zero X");
grid = gtk_grid_new ();
gtk_widget_set_margin_start (grid, 5);
gtk_widget_set_margin_end (grid, 5);
gtk_widget_set_margin_top (grid, 5);
gtk_widget_set_margin_bottom (grid, 5);
gtk_window_set_child (GTK_WINDOW (win), grid);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Above"), 1, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Below"), 1, 2, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Left"), 0, 1, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Right"), 2, 1, 1, 1);
overlay = gtk_overlay_new ();
gtk_grid_attach (GTK_GRID (grid), overlay, 1, 1, 1, 1);
text = gtk_text_view_new ();
gtk_widget_set_size_request (text, 200, 200);
gtk_widget_set_hexpand (text, TRUE);
gtk_widget_set_vexpand (text, TRUE);
gtk_overlay_set_child (GTK_OVERLAY (overlay), text);
child = gtk_label_new ("I'm the overlay");
gtk_widget_set_halign (child, GTK_ALIGN_START);
gtk_widget_set_valign (child, GTK_ALIGN_START);
gtk_widget_set_margin_start (child, 3);
gtk_widget_set_margin_end (child, 3);
gtk_widget_set_margin_top (child, 3);
gtk_widget_set_margin_bottom (child, 3);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
child = gtk_label_new ("No, I'm the overlay");
gtk_widget_set_halign (child, GTK_ALIGN_END);
gtk_widget_set_valign (child, GTK_ALIGN_END);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
gtk_widget_set_margin_start (child, 3);
gtk_widget_set_margin_end (child, 3);
gtk_widget_set_margin_top (child, 3);
gtk_widget_set_margin_bottom (child, 3);
return win;
}
static gboolean
get_child_position (GtkOverlay *overlay,
GtkWidget *widget,
GtkAllocation *alloc,
GtkWidget *relative)
{
GtkRequisition req;
GtkWidget *child;
GtkAllocation main_alloc;
gint x, y;
child = gtk_overlay_get_child (GTK_OVERLAY (overlay));
gtk_widget_translate_coordinates (relative, child, 0, 0, &x, &y);
main_alloc.x = x;
main_alloc.y = y;
main_alloc.width = gtk_widget_get_allocated_width (relative);
main_alloc.height = gtk_widget_get_allocated_height (relative);
gtk_widget_get_preferred_size (widget, NULL, &req);
alloc->x = main_alloc.x;
alloc->width = MIN (main_alloc.width, req.width);
if (gtk_widget_get_halign (widget) == GTK_ALIGN_END)
alloc->x += main_alloc.width - req.width;
alloc->y = main_alloc.y;
alloc->height = MIN (main_alloc.height, req.height);
if (gtk_widget_get_valign (widget) == GTK_ALIGN_END)
alloc->y += main_alloc.height - req.height;
return TRUE;
}
/* test custom positioning */
static GtkWidget *
test_relative (void)
{
GtkWidget *win;
GtkWidget *grid;
GtkWidget *overlay;
GtkWidget *text;
GtkWidget *child;
win = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (win), "Custom positioning");
overlay = gtk_overlay_new ();
gtk_window_set_child (GTK_WINDOW (win), overlay);
grid = gtk_grid_new ();
gtk_overlay_set_child (GTK_OVERLAY (overlay), grid);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Above"), 1, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Below"), 1, 2, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Left"), 0, 1, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Right"), 2, 1, 1, 1);
text = gtk_text_view_new ();
gtk_widget_set_size_request (text, 200, 200);
gtk_widget_set_margin_start (text, 5);
gtk_widget_set_margin_end (text, 5);
gtk_widget_set_margin_top (text, 5);
gtk_widget_set_margin_bottom (text, 5);
gtk_widget_set_hexpand (text, TRUE);
gtk_widget_set_vexpand (text, TRUE);
gtk_grid_attach (GTK_GRID (grid), text, 1, 1, 1, 1);
g_signal_connect (overlay, "get-child-position",
G_CALLBACK (get_child_position), text);
child = gtk_label_new ("Top left overlay");
gtk_widget_set_halign (child, GTK_ALIGN_START);
gtk_widget_set_valign (child, GTK_ALIGN_START);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
gtk_widget_set_margin_start (child, 1);
gtk_widget_set_margin_end (child, 1);
gtk_widget_set_margin_top (child, 1);
gtk_widget_set_margin_bottom (child, 1);
child = gtk_label_new ("Bottom right overlay");
gtk_widget_set_halign (child, GTK_ALIGN_END);
gtk_widget_set_valign (child, GTK_ALIGN_END);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
gtk_widget_set_margin_start (child, 1);
gtk_widget_set_margin_end (child, 1);
gtk_widget_set_margin_top (child, 1);
gtk_widget_set_margin_bottom (child, 1);
return win;
}
/* test GTK_ALIGN_FILL handling */
static GtkWidget *
test_fullwidth (void)
{
GtkWidget *win;
GtkWidget *overlay;
GtkWidget *text;
GtkWidget *child;
win = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (win), "Full-width");
overlay = gtk_overlay_new ();
gtk_window_set_child (GTK_WINDOW (win), overlay);
text = gtk_text_view_new ();
gtk_widget_set_size_request (text, 200, 200);
gtk_widget_set_hexpand (text, TRUE);
gtk_widget_set_vexpand (text, TRUE);
gtk_overlay_set_child (GTK_OVERLAY (overlay), text);
child = gtk_label_new ("Fullwidth top overlay");
gtk_widget_set_halign (child, GTK_ALIGN_FILL);
gtk_widget_set_valign (child, GTK_ALIGN_START);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
gtk_widget_set_margin_start (child, 4);
gtk_widget_set_margin_end (child, 4);
gtk_widget_set_margin_top (child, 4);
gtk_widget_set_margin_bottom (child, 4);
return win;
}
/* test that scrolling works as expected */
static GtkWidget *
test_scrolling (void)
{
GtkWidget *win;
GtkWidget *overlay;
GtkWidget *sw;
GtkWidget *text;
GtkWidget *child;
GtkTextBuffer *buffer;
gchar *contents;
gsize len;
win = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (win), "Scrolling");
overlay = gtk_overlay_new ();
gtk_window_set_child (GTK_WINDOW (win), overlay);
sw = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_min_content_width (GTK_SCROLLED_WINDOW (sw), 200);
gtk_scrolled_window_set_min_content_height (GTK_SCROLLED_WINDOW (sw), 200);
gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
text = gtk_text_view_new ();
buffer = gtk_text_buffer_new (NULL);
if (!g_file_get_contents ("testoverlay.c", &contents, &len, NULL))
{
contents = g_strdup ("Text should go here...");
len = strlen (contents);
}
gtk_text_buffer_set_text (buffer, contents, len);
g_free (contents);
gtk_text_view_set_buffer (GTK_TEXT_VIEW (text), buffer);
gtk_widget_set_hexpand (text, TRUE);
gtk_widget_set_vexpand (text, TRUE);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), text);
child = gtk_label_new ("This should be visible");
gtk_widget_set_halign (child, GTK_ALIGN_CENTER);
gtk_widget_set_valign (child, GTK_ALIGN_END);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
gtk_widget_set_margin_start (child, 4);
gtk_widget_set_margin_end (child, 4);
gtk_widget_set_margin_top (child, 4);
gtk_widget_set_margin_bottom (child, 4);
return win;
}
static const gchar *buffer =
"<interface>"
" <object class='GtkWindow' id='window'>"
" <property name='title'>GtkBuilder support</property>"
" <child>"
" <object class='GtkOverlay' id='overlay'>"
" <child type='overlay'>"
" <object class='GtkLabel' id='overlay-child'>"
" <property name='label'>Witty remark goes here</property>"
" <property name='halign'>end</property>"
" <property name='valign'>end</property>"
" <property name='margin'>4</property>"
" </object>"
" </child>"
" <child>"
" <object class='GtkGrid' id='grid'>"
" <child>"
" <object class='GtkLabel' id='left'>"
" <property name='label'>Left</property>"
" </object>"
" <packing>"
" <property name='left_attach'>0</property>"
" <property name='top_attach'>0</property>"
" </packing>"
" </child>"
" <child>"
" <object class='GtkLabel' id='right'>"
" <property name='label'>Right</property>"
" </object>"
" <packing>"
" <property name='left_attach'>2</property>"
" <property name='top_attach'>0</property>"
" </packing>"
" </child>"
" <child>"
" <object class='GtkTextView' id='text'>"
" <property name='width-request'>200</property>"
" <property name='height-request'>200</property>"
" <property name='hexpand'>True</property>"
" <property name='vexpand'>True</property>"
" </object>"
" <packing>"
" <property name='left_attach'>1</property>"
" <property name='top_attach'>0</property>"
" </packing>"
" </child>"
" </object>"
" </child>"
" </object>"
" </child>"
" </object>"
"</interface>";
/* test that overlays can be constructed with GtkBuilder */
static GtkWidget *
test_builder (void)
{
GtkBuilder *builder;
GtkWidget *win;
GError *error;
builder = gtk_builder_new ();
error = NULL;
if (!gtk_builder_add_from_string (builder, buffer, -1, &error))
{
g_warning ("%s", error->message);
g_error_free (error);
return NULL;
}
win = (GtkWidget *)gtk_builder_get_object (builder, "window");
g_object_ref (win);
g_object_unref (builder);
return win;
}
static void
on_enter (GtkEventController *controller,
double x,
double y,
GtkWidget *overlay)
{
GtkWidget *child = gtk_event_controller_get_widget (controller);
if (gtk_widget_get_halign (child) == GTK_ALIGN_START)
gtk_widget_set_halign (child, GTK_ALIGN_END);
else
gtk_widget_set_halign (child, GTK_ALIGN_START);
gtk_widget_queue_resize (overlay);
}
static GtkWidget *
test_chase (void)
{
GtkWidget *win;
GtkWidget *overlay;
GtkWidget *sw;
GtkWidget *text;
GtkWidget *child;
GtkTextBuffer *text_buffer;
gchar *contents;
gsize len;
GtkEventController *controller;
win = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (win), "Chase");
overlay = gtk_overlay_new ();
gtk_window_set_child (GTK_WINDOW (win), overlay);
sw = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_min_content_width (GTK_SCROLLED_WINDOW (sw), 200);
gtk_scrolled_window_set_min_content_height (GTK_SCROLLED_WINDOW (sw), 200);
gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
text = gtk_text_view_new ();
text_buffer = gtk_text_buffer_new (NULL);
if (!g_file_get_contents ("testoverlay.c", &contents, &len, NULL))
{
contents = g_strdup ("Text should go here...");
len = strlen (contents);
}
gtk_text_buffer_set_text (text_buffer, contents, len);
g_free (contents);
gtk_text_view_set_buffer (GTK_TEXT_VIEW (text), text_buffer);
gtk_widget_set_hexpand (text, TRUE);
gtk_widget_set_vexpand (text, TRUE);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), text);
child = gtk_label_new ("Try to enter");
gtk_widget_set_halign (child, GTK_ALIGN_START);
gtk_widget_set_valign (child, GTK_ALIGN_END);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
gtk_widget_set_margin_start (child, 4);
gtk_widget_set_margin_end (child, 4);
gtk_widget_set_margin_top (child, 4);
gtk_widget_set_margin_bottom (child, 4);
controller = gtk_event_controller_motion_new ();
g_signal_connect (controller, "enter", G_CALLBACK (on_enter), overlay);
gtk_widget_add_controller (child, controller);
return win;
}
static GtkWidget *
test_stacking (void)
{
GtkWidget *win;
GtkWidget *overlay;
GtkWidget *main_child;
GtkWidget *label;
GtkWidget *child;
GtkWidget *grid;
GtkWidget *check1;
GtkWidget *check2;
win = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (win), "Stacking");
grid = gtk_grid_new ();
overlay = gtk_overlay_new ();
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main_child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_widget_add_css_class (main_child, "overlay-green");
gtk_widget_set_hexpand (main_child, TRUE);
gtk_widget_set_vexpand (main_child, TRUE);
label = gtk_label_new ("Main child");
child = gtk_label_new ("Overlay");
gtk_widget_set_halign (child, GTK_ALIGN_END);
gtk_widget_set_valign (child, GTK_ALIGN_END);
check1 = gtk_check_button_new_with_label ("Show main");
g_object_bind_property (main_child, "visible", check1, "active", G_BINDING_BIDIRECTIONAL);
check2 = gtk_check_button_new_with_label ("Show overlay");
g_object_bind_property (child, "visible", check2, "active", G_BINDING_BIDIRECTIONAL);
gtk_container_add (GTK_CONTAINER (main_child), label);
gtk_overlay_set_child (GTK_OVERLAY (overlay), main_child);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
gtk_grid_attach (GTK_GRID (grid), overlay, 1, 0, 1, 3);
gtk_window_set_child (GTK_WINDOW (win), grid);
gtk_grid_attach (GTK_GRID (grid), check1, 0, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), check2, 0, 1, 1, 1);
child = gtk_label_new ("");
gtk_widget_set_vexpand (child, TRUE);
gtk_grid_attach (GTK_GRID (grid), child, 0, 2, 1, 1);
return win;
}
static GtkWidget *
test_input_stacking (void)
{
GtkWidget *win;
GtkWidget *overlay;
GtkWidget *label, *entry;
GtkWidget *grid;
GtkWidget *button;
GtkWidget *vbox;
int i,j;
win = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (win), "Input Stacking");
overlay = gtk_overlay_new ();
grid = gtk_grid_new ();
gtk_overlay_set_child (GTK_OVERLAY (overlay), grid);
for (j = 0; j < 5; j++)
{
for (i = 0; i < 5; i++)
{
button = gtk_button_new_with_label (" ");
gtk_widget_set_hexpand (button, TRUE);
gtk_widget_set_vexpand (button, TRUE);
gtk_grid_attach (GTK_GRID (grid), button, i, j, 1, 1);
}
}
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), vbox);
gtk_widget_set_can_target (vbox, FALSE);
gtk_widget_set_halign (vbox, GTK_ALIGN_CENTER);
gtk_widget_set_valign (vbox, GTK_ALIGN_CENTER);
label = gtk_label_new ("This is some overlaid text\n"
"It does not get input\n"
"But the entry does");
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gtk_widget_set_margin_top (label, 8);
gtk_widget_set_margin_bottom (label, 8);
gtk_container_add (GTK_CONTAINER (vbox), label);
entry = gtk_entry_new ();
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gtk_widget_set_margin_top (entry, 8);
gtk_widget_set_margin_bottom (entry, 8);
gtk_container_add (GTK_CONTAINER (vbox), entry);
gtk_window_set_child (GTK_WINDOW (win), overlay);
return win;
}
int
main (int argc, char *argv[])
{
GtkWidget *win1;
GtkWidget *win2;
GtkWidget *win3;
GtkWidget *win4;
GtkWidget *win5;
GtkWidget *win6;
GtkWidget *win7;
GtkWidget *win8;
GtkCssProvider *css_provider;
gtk_init ();
if (g_getenv ("RTL"))
gtk_widget_set_default_direction (GTK_TEXT_DIR_RTL);
css_provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (css_provider, css, -1);
gtk_style_context_add_provider_for_display (gdk_display_get_default (),
GTK_STYLE_PROVIDER (css_provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
win1 = test_nonzerox ();
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gtk_widget_show (win1);
win2 = test_relative ();
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gtk_widget_show (win2);
win3 = test_fullwidth ();
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gtk_widget_show (win3);
win4 = test_scrolling ();
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gtk_widget_show (win4);
win5 = test_builder ();
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gtk_widget_show (win5);
win6 = test_chase ();
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gtk_widget_show (win6);
win7 = test_stacking ();
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gtk_widget_show (win7);
win8 = test_input_stacking ();
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gtk_widget_show (win8);
while (TRUE)
g_main_context_iteration (NULL, TRUE);
return 0;
}