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-rw-r--r--gtk+-mingw/share/gtk-3.0/demo/drawingarea.c296
1 files changed, 0 insertions, 296 deletions
diff --git a/gtk+-mingw/share/gtk-3.0/demo/drawingarea.c b/gtk+-mingw/share/gtk-3.0/demo/drawingarea.c
deleted file mode 100644
index c7bbcae..0000000
--- a/gtk+-mingw/share/gtk-3.0/demo/drawingarea.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/* Drawing Area
- *
- * GtkDrawingArea is a blank area where you can draw custom displays
- * of various kinds.
- *
- * This demo has two drawing areas. The checkerboard area shows
- * how you can just draw something; all you have to do is write
- * a signal handler for expose_event, as shown here.
- *
- * The "scribble" area is a bit more advanced, and shows how to handle
- * events such as button presses and mouse motion. Click the mouse
- * and drag in the scribble area to draw squiggles. Resize the window
- * to clear the area.
- */
-
-#include <gtk/gtk.h>
-
-static GtkWidget *window = NULL;
-/* Pixmap for scribble area, to store current scribbles */
-static cairo_surface_t *surface = NULL;
-
-/* Create a new surface of the appropriate size to store our scribbles */
-static gboolean
-scribble_configure_event (GtkWidget *widget,
- GdkEventConfigure *event,
- gpointer data)
-{
- GtkAllocation allocation;
- cairo_t *cr;
-
- if (surface)
- cairo_surface_destroy (surface);
-
- gtk_widget_get_allocation (widget, &allocation);
- surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
- CAIRO_CONTENT_COLOR,
- allocation.width,
- allocation.height);
-
- /* Initialize the surface to white */
- cr = cairo_create (surface);
-
- cairo_set_source_rgb (cr, 1, 1, 1);
- cairo_paint (cr);
-
- cairo_destroy (cr);
-
- /* We've handled the configure event, no need for further processing. */
- return TRUE;
-}
-
-/* Redraw the screen from the surface */
-static gboolean
-scribble_draw (GtkWidget *widget,
- cairo_t *cr,
- gpointer data)
-{
- cairo_set_source_surface (cr, surface, 0, 0);
- cairo_paint (cr);
-
- return FALSE;
-}
-
-/* Draw a rectangle on the screen */
-static void
-draw_brush (GtkWidget *widget,
- gdouble x,
- gdouble y)
-{
- GdkRectangle update_rect;
- cairo_t *cr;
-
- update_rect.x = x - 3;
- update_rect.y = y - 3;
- update_rect.width = 6;
- update_rect.height = 6;
-
- /* Paint to the surface, where we store our state */
- cr = cairo_create (surface);
-
- gdk_cairo_rectangle (cr, &update_rect);
- cairo_fill (cr);
-
- cairo_destroy (cr);
-
- /* Now invalidate the affected region of the drawing area. */
- gdk_window_invalidate_rect (gtk_widget_get_window (widget),
- &update_rect,
- FALSE);
-}
-
-static gboolean
-scribble_button_press_event (GtkWidget *widget,
- GdkEventButton *event,
- gpointer data)
-{
- if (surface == NULL)
- return FALSE; /* paranoia check, in case we haven't gotten a configure event */
-
- if (event->button == GDK_BUTTON_PRIMARY)
- draw_brush (widget, event->x, event->y);
-
- /* We've handled the event, stop processing */
- return TRUE;
-}
-
-static gboolean
-scribble_motion_notify_event (GtkWidget *widget,
- GdkEventMotion *event,
- gpointer data)
-{
- int x, y;
- GdkModifierType state;
-
- if (surface == NULL)
- return FALSE; /* paranoia check, in case we haven't gotten a configure event */
-
- /* This call is very important; it requests the next motion event.
- * If you don't call gdk_window_get_pointer() you'll only get
- * a single motion event. The reason is that we specified
- * GDK_POINTER_MOTION_HINT_MASK to gtk_widget_set_events().
- * If we hadn't specified that, we could just use event->x, event->y
- * as the pointer location. But we'd also get deluged in events.
- * By requesting the next event as we handle the current one,
- * we avoid getting a huge number of events faster than we
- * can cope.
- */
-
- gdk_window_get_device_position (event->window, event->device, &x, &y, &state);
-
- if (state & GDK_BUTTON1_MASK)
- draw_brush (widget, x, y);
-
- /* We've handled it, stop processing */
- return TRUE;
-}
-
-
-static gboolean
-checkerboard_draw (GtkWidget *da,
- cairo_t *cr,
- gpointer data)
-{
- gint i, j, xcount, ycount, width, height;
-
-#define CHECK_SIZE 10
-#define SPACING 2
-
- /* At the start of a draw handler, a clip region has been set on
- * the Cairo context, and the contents have been cleared to the
- * widget's background color. The docs for
- * gdk_window_begin_paint_region() give more details on how this
- * works.
- */
-
- xcount = 0;
- width = gtk_widget_get_allocated_width (da);
- height = gtk_widget_get_allocated_height (da);
- i = SPACING;
- while (i < width)
- {
- j = SPACING;
- ycount = xcount % 2; /* start with even/odd depending on row */
- while (j < height)
- {
- if (ycount % 2)
- cairo_set_source_rgb (cr, 0.45777, 0, 0.45777);
- else
- cairo_set_source_rgb (cr, 1, 1, 1);
-
- /* If we're outside the clip, this will do nothing.
- */
- cairo_rectangle (cr, i, j, CHECK_SIZE, CHECK_SIZE);
- cairo_fill (cr);
-
- j += CHECK_SIZE + SPACING;
- ++ycount;
- }
-
- i += CHECK_SIZE + SPACING;
- ++xcount;
- }
-
- /* return TRUE because we've handled this event, so no
- * further processing is required.
- */
- return TRUE;
-}
-
-static void
-close_window (void)
-{
- window = NULL;
-
- if (surface)
- cairo_surface_destroy (surface);
- surface = NULL;
-}
-
-GtkWidget *
-do_drawingarea (GtkWidget *do_widget)
-{
- GtkWidget *frame;
- GtkWidget *vbox;
- GtkWidget *da;
- GtkWidget *label;
-
- if (!window)
- {
- window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
- gtk_window_set_screen (GTK_WINDOW (window),
- gtk_widget_get_screen (do_widget));
- gtk_window_set_title (GTK_WINDOW (window), "Drawing Area");
-
- g_signal_connect (window, "destroy", G_CALLBACK (close_window), NULL);
-
- gtk_container_set_border_width (GTK_CONTAINER (window), 8);
-
- vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
- gtk_container_set_border_width (GTK_CONTAINER (vbox), 8);
- gtk_container_add (GTK_CONTAINER (window), vbox);
-
- /*
- * Create the checkerboard area
- */
-
- label = gtk_label_new (NULL);
- gtk_label_set_markup (GTK_LABEL (label),
- "<u>Checkerboard pattern</u>");
- gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
- frame = gtk_frame_new (NULL);
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
- gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
-
- da = gtk_drawing_area_new ();
- /* set a minimum size */
- gtk_widget_set_size_request (da, 100, 100);
-
- gtk_container_add (GTK_CONTAINER (frame), da);
-
- g_signal_connect (da, "draw",
- G_CALLBACK (checkerboard_draw), NULL);
-
- /*
- * Create the scribble area
- */
-
- label = gtk_label_new (NULL);
- gtk_label_set_markup (GTK_LABEL (label),
- "<u>Scribble area</u>");
- gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
- frame = gtk_frame_new (NULL);
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
- gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
-
- da = gtk_drawing_area_new ();
- /* set a minimum size */
- gtk_widget_set_size_request (da, 100, 100);
-
- gtk_container_add (GTK_CONTAINER (frame), da);
-
- /* Signals used to handle backing surface */
-
- g_signal_connect (da, "draw",
- G_CALLBACK (scribble_draw), NULL);
- g_signal_connect (da,"configure-event",
- G_CALLBACK (scribble_configure_event), NULL);
-
- /* Event signals */
-
- g_signal_connect (da, "motion-notify-event",
- G_CALLBACK (scribble_motion_notify_event), NULL);
- g_signal_connect (da, "button-press-event",
- G_CALLBACK (scribble_button_press_event), NULL);
-
-
- /* Ask to receive events the drawing area doesn't normally
- * subscribe to
- */
- gtk_widget_set_events (da, gtk_widget_get_events (da)
- | GDK_LEAVE_NOTIFY_MASK
- | GDK_BUTTON_PRESS_MASK
- | GDK_POINTER_MOTION_MASK
- | GDK_POINTER_MOTION_HINT_MASK);
-
- }
-
- if (!gtk_widget_get_visible (window))
- gtk_widget_show_all (window);
- else
- gtk_widget_destroy (window);
-
- return window;
-}
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