77e0d83000
We need to take the device scale into account, like it is done in gdkwindow.c. This fixes wrongly placed DnD surfaces in scaled contexts on X11 as well as Wayland.
394 lines
12 KiB
C
394 lines
12 KiB
C
#include <gtk/gtk.h>
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static GtkTargetEntry entries[] = {
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{ "GTK_LIST_BOX_ROW", GTK_TARGET_SAME_APP, 0 }
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};
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static void
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drag_begin (GtkWidget *widget,
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GdkDragContext *context,
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gpointer data)
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{
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GtkWidget *row;
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GtkAllocation alloc;
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cairo_surface_t *surface;
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cairo_t *cr;
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int x, y;
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double sx, sy;
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row = gtk_widget_get_ancestor (widget, GTK_TYPE_LIST_BOX_ROW);
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gtk_widget_get_allocation (row, &alloc);
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surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, alloc.width, alloc.height);
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cr = cairo_create (surface);
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gtk_style_context_add_class (gtk_widget_get_style_context (row), "drag-icon");
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gtk_widget_draw (row, cr);
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gtk_style_context_remove_class (gtk_widget_get_style_context (row), "drag-icon");
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gtk_widget_translate_coordinates (widget, row, 0, 0, &x, &y);
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cairo_surface_get_device_scale (surface, &sx, &sy);
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cairo_surface_set_device_offset (surface, -x * sy, -y * sy);
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gtk_drag_set_icon_surface (context, surface);
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cairo_destroy (cr);
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cairo_surface_destroy (surface);
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g_object_set_data (G_OBJECT (gtk_widget_get_parent (row)), "drag-row", row);
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gtk_style_context_add_class (gtk_widget_get_style_context (row), "drag-row");
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}
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static void
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drag_end (GtkWidget *widget,
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GdkDragContext *context,
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gpointer data)
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{
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GtkWidget *row;
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row = gtk_widget_get_ancestor (widget, GTK_TYPE_LIST_BOX_ROW);
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g_object_set_data (G_OBJECT (gtk_widget_get_parent (row)), "drag-row", NULL);
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gtk_style_context_remove_class (gtk_widget_get_style_context (row), "drag-row");
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gtk_style_context_remove_class (gtk_widget_get_style_context (row), "drag-hover");
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}
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void
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drag_data_get (GtkWidget *widget,
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GdkDragContext *context,
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GtkSelectionData *selection_data,
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guint info,
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guint time,
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gpointer data)
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{
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gtk_selection_data_set (selection_data,
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gdk_atom_intern_static_string ("GTK_LIST_BOX_ROW"),
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32,
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(const guchar *)&widget,
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sizeof (gpointer));
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}
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static GtkListBoxRow *
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get_last_row (GtkListBox *list)
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{
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int i;
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GtkListBoxRow *row;
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row = NULL;
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for (i = 0; ; i++)
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{
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GtkListBoxRow *tmp;
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tmp = gtk_list_box_get_row_at_index (list, i);
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if (tmp == NULL)
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return row;
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row = tmp;
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}
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return row;
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}
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static GtkListBoxRow *
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get_row_before (GtkListBox *list,
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GtkListBoxRow *row)
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{
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int pos = gtk_list_box_row_get_index (row);
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return gtk_list_box_get_row_at_index (list, pos - 1);
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}
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static GtkListBoxRow *
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get_row_after (GtkListBox *list,
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GtkListBoxRow *row)
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{
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int pos = gtk_list_box_row_get_index (row);
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return gtk_list_box_get_row_at_index (list, pos + 1);
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}
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static void
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drag_data_received (GtkWidget *widget,
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GdkDragContext *context,
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gint x,
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gint y,
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GtkSelectionData *selection_data,
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guint info,
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guint32 time,
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gpointer data)
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{
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GtkWidget *row_before;
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GtkWidget *row_after;
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GtkWidget *row;
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GtkWidget *source;
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int pos;
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row_before = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-before"));
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row_after = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-after"));
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g_object_set_data (G_OBJECT (widget), "row-before", NULL);
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g_object_set_data (G_OBJECT (widget), "row-after", NULL);
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if (row_before)
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gtk_style_context_remove_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
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if (row_after)
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gtk_style_context_remove_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
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row = (gpointer)* (gpointer*)gtk_selection_data_get_data (selection_data);
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source = gtk_widget_get_ancestor (row, GTK_TYPE_LIST_BOX_ROW);
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if (source == row_after)
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return;
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g_object_ref (source);
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gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (source)), source);
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if (row_after)
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pos = gtk_list_box_row_get_index (GTK_LIST_BOX_ROW (row_after));
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else
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pos = gtk_list_box_row_get_index (GTK_LIST_BOX_ROW (row_before)) + 1;
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gtk_list_box_insert (GTK_LIST_BOX (widget), source, pos);
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g_object_unref (source);
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}
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static gboolean
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drag_motion (GtkWidget *widget,
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GdkDragContext *context,
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int x,
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int y,
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guint time)
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{
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GtkAllocation alloc;
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GtkWidget *row;
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int hover_row_y;
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int hover_row_height;
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GtkWidget *drag_row;
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GtkWidget *row_before;
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GtkWidget *row_after;
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row = GTK_WIDGET (gtk_list_box_get_row_at_y (GTK_LIST_BOX (widget), y));
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drag_row = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "drag-row"));
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row_before = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-before"));
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row_after = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-after"));
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gtk_style_context_remove_class (gtk_widget_get_style_context (drag_row), "drag-hover");
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if (row_before)
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gtk_style_context_remove_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
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if (row_after)
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gtk_style_context_remove_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
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if (row)
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{
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gtk_widget_get_allocation (row, &alloc);
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hover_row_y = alloc.y;
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hover_row_height = alloc.height;
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if (y < hover_row_y + hover_row_height/2)
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{
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row_after = row;
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row_before = GTK_WIDGET (get_row_before (GTK_LIST_BOX (widget), GTK_LIST_BOX_ROW (row)));
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}
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else
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{
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row_before = row;
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row_after = GTK_WIDGET (get_row_after (GTK_LIST_BOX (widget), GTK_LIST_BOX_ROW (row)));
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}
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}
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else
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{
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row_before = GTK_WIDGET (get_last_row (GTK_LIST_BOX (widget)));
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row_after = NULL;
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}
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g_object_set_data (G_OBJECT (widget), "row-before", row_before);
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g_object_set_data (G_OBJECT (widget), "row-after", row_after);
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if (drag_row == row_before || drag_row == row_after)
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{
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gtk_style_context_add_class (gtk_widget_get_style_context (drag_row), "drag-hover");
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return FALSE;
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}
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if (row_before)
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gtk_style_context_add_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
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if (row_after)
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gtk_style_context_add_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
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return TRUE;
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}
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static void
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drag_leave (GtkWidget *widget,
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GdkDragContext *context,
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guint time)
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{
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GtkWidget *drag_row;
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GtkWidget *row_before;
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GtkWidget *row_after;
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drag_row = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "drag-row"));
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row_before = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-before"));
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row_after = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-after"));
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gtk_style_context_remove_class (gtk_widget_get_style_context (drag_row), "drag-hover");
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if (row_before)
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gtk_style_context_remove_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
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if (row_after)
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gtk_style_context_remove_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
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}
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static GtkWidget *
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create_row (const gchar *text)
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{
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GtkWidget *row, *ebox, *box, *label, *image;
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row = gtk_list_box_row_new ();
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ebox = gtk_event_box_new ();
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image = gtk_image_new_from_icon_name ("open-menu-symbolic", 1);
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gtk_container_add (GTK_CONTAINER (ebox), image);
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box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
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g_object_set (box, "margin-start", 10, "margin-end", 10, NULL);
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label = gtk_label_new (text);
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gtk_container_add (GTK_CONTAINER (row), box);
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gtk_box_pack_start (GTK_BOX (box), label, TRUE, FALSE, 0);
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gtk_container_add (GTK_CONTAINER (box), ebox);
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gtk_style_context_add_class (gtk_widget_get_style_context (row), "row");
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gtk_drag_source_set (ebox, GDK_BUTTON1_MASK, entries, 1, GDK_ACTION_MOVE);
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g_signal_connect (ebox, "drag-begin", G_CALLBACK (drag_begin), NULL);
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g_signal_connect (ebox, "drag-end", G_CALLBACK (drag_end), NULL);
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g_signal_connect (ebox, "drag-data-get", G_CALLBACK (drag_data_get), NULL);
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return row;
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}
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static void
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on_row_activated (GtkListBox *self,
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GtkWidget *child)
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{
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const char *id;
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id = g_object_get_data (G_OBJECT (gtk_bin_get_child (GTK_BIN (child))), "id");
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g_message ("Row activated %p: %s", child, id);
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}
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static void
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on_selected_children_changed (GtkListBox *self)
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{
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g_message ("Selection changed");
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}
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static void
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a11y_selection_changed (AtkObject *obj)
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{
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g_message ("Accessible selection changed");
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}
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static void
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selection_mode_changed (GtkComboBox *combo, gpointer data)
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{
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GtkListBox *list = data;
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gtk_list_box_set_selection_mode (list, gtk_combo_box_get_active (combo));
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}
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static const char *css =
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".row:not(:first-child) { "
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" border-top: 1px solid alpha(gray,0.5); "
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" border-bottom: 1px solid transparent; "
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"}"
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".row:first-child { "
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" border-top: 1px solid transparent; "
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" border-bottom: 1px solid transparent; "
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"}"
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".row:last-child { "
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" border-top: 1px solid alpha(gray,0.5); "
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" border-bottom: 1px solid alpha(gray,0.5); "
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"}"
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".row.drag-icon { "
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" background: white; "
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" border: 1px solid black; "
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"}"
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".row.drag-row { "
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" color: gray; "
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" background: alpha(gray,0.2); "
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"}"
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".row.drag-row.drag-hover { "
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" border-top: 1px solid #4e9a06; "
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" border-bottom: 1px solid #4e9a06; "
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"}"
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".row.drag-hover image, "
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".row.drag-hover label { "
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" color: #4e9a06; "
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"}"
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".row.drag-hover-top {"
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" border-top: 1px solid #4e9a06; "
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"}"
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".row.drag-hover-bottom {"
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" border-bottom: 1px solid #4e9a06; "
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"}"
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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 *window, *list, *sw, *row;
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GtkWidget *hbox, *vbox, *combo, *button;
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gint i;
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gchar *text;
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GtkCssProvider *provider;
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gtk_init (NULL, NULL);
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provider = gtk_css_provider_new ();
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gtk_css_provider_load_from_data (provider, css, -1, NULL);
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gtk_style_context_add_provider_for_screen (gdk_screen_get_default (), GTK_STYLE_PROVIDER (provider), 800);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_default_size (GTK_WINDOW (window), -1, 300);
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hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
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gtk_container_add (GTK_CONTAINER (window), hbox);
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vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
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g_object_set (vbox, "margin", 12, NULL);
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gtk_container_add (GTK_CONTAINER (hbox), vbox);
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list = gtk_list_box_new ();
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gtk_list_box_set_selection_mode (GTK_LIST_BOX (list), GTK_SELECTION_NONE);
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gtk_drag_dest_set (list, GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_DROP, entries, 1, GDK_ACTION_MOVE);
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g_signal_connect (list, "drag-data-received", G_CALLBACK (drag_data_received), NULL);
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g_signal_connect (list, "drag-motion", G_CALLBACK (drag_motion), NULL);
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g_signal_connect (list, "drag-leave", G_CALLBACK (drag_leave), NULL);
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g_signal_connect (list, "row-activated", G_CALLBACK (on_row_activated), NULL);
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g_signal_connect (list, "selected-rows-changed", G_CALLBACK (on_selected_children_changed), NULL);
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g_signal_connect (gtk_widget_get_accessible (list), "selection-changed", G_CALLBACK (a11y_selection_changed), NULL);
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sw = gtk_scrolled_window_new (NULL, NULL);
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gtk_widget_set_hexpand (sw, TRUE);
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
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gtk_container_add (GTK_CONTAINER (hbox), sw);
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gtk_container_add (GTK_CONTAINER (sw), list);
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button = gtk_check_button_new_with_label ("Activate on single click");
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g_object_bind_property (list, "activate-on-single-click",
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button, "active",
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G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
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gtk_container_add (GTK_CONTAINER (vbox), button);
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combo = gtk_combo_box_text_new ();
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gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "None");
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gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Single");
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gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Browse");
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gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Multiple");
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g_signal_connect (combo, "changed", G_CALLBACK (selection_mode_changed), list);
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gtk_container_add (GTK_CONTAINER (vbox), combo);
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gtk_combo_box_set_active (GTK_COMBO_BOX (combo), gtk_list_box_get_selection_mode (GTK_LIST_BOX (list)));
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for (i = 0; i < 20; i++)
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{
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text = g_strdup_printf ("Row %d", i);
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row = create_row (text);
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gtk_list_box_insert (GTK_LIST_BOX (list), row, -1);
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}
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gtk_widget_show_all (window);
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gtk_main ();
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return 0;
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}
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