gtk: add support for screen scaling and full screen (v5)
Basic menu items to enter full screen mode and zoom in/out. Unlike SDL, we don't allow arbitrary scaling based on window resizing. The current behavior with SDL causes a lot of problems for me. Sometimes I accidentally resize the window a tiny bit while trying to move it (Ubuntu's 1-pixel window decorations don't help here). After that, scaling is now active and if the screen changes size again, badness ensues since the aspect ratio is skewed. Allowing zooming by 25% in and out should cover most use cases. We can add a more flexible scaling later but for now, I think this is a more friendly behavior. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Message-id: 1361367806-4599-7-git-send-email-aliguori@us.ibm.com
This commit is contained in:
Anthony Liguori
parent
5104a1f650
commit
c61584833c
254
ui/gtk.c
254
ui/gtk.c
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@ -80,6 +80,11 @@ typedef struct GtkDisplayState
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GtkWidget *view_menu_item;
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GtkWidget *view_menu;
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GtkWidget *full_screen_item;
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GtkWidget *zoom_in_item;
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GtkWidget *zoom_out_item;
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GtkWidget *zoom_fixed_item;
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GtkWidget *zoom_fit_item;
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GtkWidget *grab_item;
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GtkWidget *grab_on_hover_item;
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GtkWidget *vga_item;
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@ -101,9 +106,11 @@ typedef struct GtkDisplayState
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double scale_x;
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double scale_y;
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gboolean full_screen;
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GdkCursor *null_cursor;
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Notifier mouse_mode_notifier;
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gboolean free_scale;
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} GtkDisplayState;
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static GtkDisplayState *global_state;
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@ -135,7 +142,7 @@ static void gd_update_cursor(GtkDisplayState *s, gboolean override)
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on_vga = gd_on_vga(s);
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if ((override || on_vga) &&
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(kbd_mouse_is_absolute() || gd_is_grab_active(s))) {
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(s->full_screen || kbd_mouse_is_absolute() || gd_is_grab_active(s))) {
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gdk_window_set_cursor(window, s->null_cursor);
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} else {
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gdk_window_set_cursor(window, NULL);
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@ -173,6 +180,9 @@ static void gd_update(DisplayState *ds, int x, int y, int w, int h)
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{
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GtkDisplayState *s = ds->opaque;
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int x1, x2, y1, y2;
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int mx, my;
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int fbw, fbh;
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int ww, wh;
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DPRINTF("update(x=%d, y=%d, w=%d, h=%d)\n", x, y, w, h);
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@ -182,7 +192,20 @@ static void gd_update(DisplayState *ds, int x, int y, int w, int h)
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x2 = ceil(x * s->scale_x + w * s->scale_x);
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y2 = ceil(y * s->scale_y + h * s->scale_y);
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gtk_widget_queue_draw_area(s->drawing_area, x1, y1, (x2 - x1), (y2 - y1));
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fbw = ds_get_width(s->ds) * s->scale_x;
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fbh = ds_get_height(s->ds) * s->scale_y;
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gdk_drawable_get_size(gtk_widget_get_window(s->drawing_area), &ww, &wh);
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mx = my = 0;
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if (ww > fbw) {
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mx = (ww - fbw) / 2;
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}
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if (wh > fbh) {
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my = (wh - fbh) / 2;
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}
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gtk_widget_queue_draw_area(s->drawing_area, mx + x1, my + y1, (x2 - x1), (y2 - y1));
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}
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static void gd_refresh(DisplayState *ds)
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@ -227,9 +250,29 @@ static void gd_resize(DisplayState *ds)
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ds_get_height(ds),
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ds_get_linesize(ds));
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gtk_widget_set_size_request(s->drawing_area,
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ds_get_width(ds) * s->scale_x,
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ds_get_height(ds) * s->scale_y);
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if (!s->full_screen) {
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GtkRequisition req;
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double sx, sy;
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if (s->free_scale) {
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sx = s->scale_x;
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sy = s->scale_y;
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s->scale_y = 1.0;
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s->scale_x = 1.0;
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} else {
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sx = 1.0;
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sy = 1.0;
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}
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gtk_widget_set_size_request(s->drawing_area,
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ds_get_width(ds) * s->scale_x,
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ds_get_height(ds) * s->scale_y);
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gtk_widget_size_request(s->vbox, &req);
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gtk_window_resize(GTK_WINDOW(s->window),
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req.width * sx, req.height * sy);
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}
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}
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/** QEMU Events **/
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@ -266,29 +309,55 @@ static gboolean gd_window_close(GtkWidget *widget, GdkEvent *event,
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static gboolean gd_draw_event(GtkWidget *widget, cairo_t *cr, void *opaque)
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{
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GtkDisplayState *s = opaque;
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int mx, my;
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int ww, wh;
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int fbw, fbh;
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if (!gtk_widget_get_realized(widget)) {
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return FALSE;
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}
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fbw = ds_get_width(s->ds);
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fbh = ds_get_height(s->ds);
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gdk_drawable_get_size(gtk_widget_get_window(widget), &ww, &wh);
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cairo_rectangle(cr, 0, 0, ww, wh);
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if (ww != fbw || wh != fbh) {
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if (s->full_screen) {
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s->scale_x = (double)ww / fbw;
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s->scale_y = (double)wh / fbh;
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cairo_scale(cr, s->scale_x, s->scale_y);
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} else {
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s->scale_x = 1.0;
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s->scale_y = 1.0;
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} else if (s->free_scale) {
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double sx, sy;
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sx = (double)ww / fbw;
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sy = (double)wh / fbh;
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s->scale_x = s->scale_y = MIN(sx, sy);
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}
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fbw *= s->scale_x;
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fbh *= s->scale_y;
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cairo_set_source_surface(cr, s->surface, 0, 0);
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mx = my = 0;
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if (ww > fbw) {
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mx = (ww - fbw) / 2;
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}
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if (wh > fbh) {
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my = (wh - fbh) / 2;
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}
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cairo_rectangle(cr, 0, 0, ww, wh);
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/* Optionally cut out the inner area where the pixmap
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will be drawn. This avoids 'flashing' since we're
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not double-buffering. Note we're using the undocumented
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behaviour of drawing the rectangle from right to left
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to cut out the whole */
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cairo_rectangle(cr, mx + fbw, my,
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-1 * fbw, fbh);
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cairo_fill(cr);
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cairo_scale(cr, s->scale_x, s->scale_y);
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cairo_set_source_surface(cr, s->surface, mx / s->scale_x, my / s->scale_y);
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cairo_paint(cr);
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return TRUE;
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@ -321,9 +390,31 @@ static gboolean gd_motion_event(GtkWidget *widget, GdkEventMotion *motion,
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GtkDisplayState *s = opaque;
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int dx, dy;
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int x, y;
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int mx, my;
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int fbh, fbw;
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int ww, wh;
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x = motion->x / s->scale_x;
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y = motion->y / s->scale_y;
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fbw = ds_get_width(s->ds) * s->scale_x;
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fbh = ds_get_height(s->ds) * s->scale_y;
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gdk_drawable_get_size(gtk_widget_get_window(s->drawing_area), &ww, &wh);
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mx = my = 0;
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if (ww > fbw) {
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mx = (ww - fbw) / 2;
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}
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if (wh > fbh) {
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my = (wh - fbh) / 2;
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}
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x = (motion->x - mx) / s->scale_x;
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y = (motion->y - my) / s->scale_y;
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if (x < 0 || y < 0 ||
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x >= ds_get_width(s->ds) ||
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y >= ds_get_height(s->ds)) {
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return TRUE;
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}
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if (kbd_mouse_is_absolute()) {
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dx = x * 0x7FFF / (ds_get_width(s->ds) - 1);
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@ -492,6 +583,90 @@ static void gd_menu_show_tabs(GtkMenuItem *item, void *opaque)
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}
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}
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static void gd_menu_full_screen(GtkMenuItem *item, void *opaque)
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{
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GtkDisplayState *s = opaque;
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if (gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(s->full_screen_item))) {
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gtk_notebook_set_show_tabs(GTK_NOTEBOOK(s->notebook), FALSE);
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gtk_widget_set_size_request(s->menu_bar, 0, 0);
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gtk_widget_set_size_request(s->drawing_area, -1, -1);
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gtk_window_fullscreen(GTK_WINDOW(s->window));
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if (gd_on_vga(s)) {
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gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->grab_item), TRUE);
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}
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s->full_screen = TRUE;
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} else {
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gtk_window_unfullscreen(GTK_WINDOW(s->window));
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gd_menu_show_tabs(GTK_MENU_ITEM(s->show_tabs_item), s);
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gtk_widget_set_size_request(s->menu_bar, -1, -1);
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gtk_widget_set_size_request(s->drawing_area,
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ds_get_width(s->ds), ds_get_height(s->ds));
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gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->grab_item), FALSE);
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s->full_screen = FALSE;
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s->scale_x = 1.0;
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s->scale_y = 1.0;
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}
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gd_update_cursor(s, FALSE);
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}
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static void gd_menu_zoom_in(GtkMenuItem *item, void *opaque)
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{
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GtkDisplayState *s = opaque;
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gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->zoom_fit_item),
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FALSE);
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s->scale_x += .25;
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s->scale_y += .25;
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gd_resize(s->ds);
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}
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static void gd_menu_zoom_out(GtkMenuItem *item, void *opaque)
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{
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GtkDisplayState *s = opaque;
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gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->zoom_fit_item),
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FALSE);
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s->scale_x -= .25;
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s->scale_y -= .25;
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s->scale_x = MAX(s->scale_x, .25);
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s->scale_y = MAX(s->scale_y, .25);
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gd_resize(s->ds);
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}
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static void gd_menu_zoom_fixed(GtkMenuItem *item, void *opaque)
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{
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GtkDisplayState *s = opaque;
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s->scale_x = 1.0;
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s->scale_y = 1.0;
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gd_resize(s->ds);
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}
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static void gd_menu_zoom_fit(GtkMenuItem *item, void *opaque)
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{
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GtkDisplayState *s = opaque;
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int ww, wh;
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if (gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(s->zoom_fit_item))) {
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s->free_scale = TRUE;
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} else {
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s->free_scale = FALSE;
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}
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gd_resize(s->ds);
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gdk_drawable_get_size(gtk_widget_get_window(s->drawing_area), &ww, &wh);
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gtk_widget_queue_draw_area(s->drawing_area, 0, 0, ww, wh);
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}
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static void gd_grab_keyboard(GtkDisplayState *s)
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{
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gdk_keyboard_grab(gtk_widget_get_window(GTK_WIDGET(s->drawing_area)),
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@ -551,6 +726,9 @@ static void gd_change_page(GtkNotebook *nb, gpointer arg1, guint arg2,
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if (!on_vga) {
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gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->grab_item),
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FALSE);
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} else if (s->full_screen) {
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gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->grab_item),
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TRUE);
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}
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if (arg2 == 0) {
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@ -739,6 +917,16 @@ static void gd_connect_signals(GtkDisplayState *s)
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g_signal_connect(s->quit_item, "activate",
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G_CALLBACK(gd_menu_quit), s);
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g_signal_connect(s->full_screen_item, "activate",
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G_CALLBACK(gd_menu_full_screen), s);
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g_signal_connect(s->zoom_in_item, "activate",
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G_CALLBACK(gd_menu_zoom_in), s);
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g_signal_connect(s->zoom_out_item, "activate",
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G_CALLBACK(gd_menu_zoom_out), s);
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g_signal_connect(s->zoom_fixed_item, "activate",
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G_CALLBACK(gd_menu_zoom_fixed), s);
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g_signal_connect(s->zoom_fit_item, "activate",
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G_CALLBACK(gd_menu_zoom_fit), s);
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g_signal_connect(s->vga_item, "activate",
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G_CALLBACK(gd_menu_switch_vc), s);
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g_signal_connect(s->grab_item, "activate",
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@ -774,6 +962,39 @@ static void gd_create_menus(GtkDisplayState *s)
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gtk_menu_set_accel_group(GTK_MENU(s->view_menu), accel_group);
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s->view_menu_item = gtk_menu_item_new_with_mnemonic("_View");
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s->full_screen_item = gtk_check_menu_item_new_with_mnemonic("_Full Screen");
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gtk_menu_item_set_accel_path(GTK_MENU_ITEM(s->full_screen_item),
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"<QEMU>/View/Full Screen");
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gtk_accel_map_add_entry("<QEMU>/View/Full Screen", GDK_KEY_f, GDK_CONTROL_MASK | GDK_MOD1_MASK);
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gtk_menu_append(GTK_MENU(s->view_menu), s->full_screen_item);
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separator = gtk_separator_menu_item_new();
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gtk_menu_append(GTK_MENU(s->view_menu), separator);
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s->zoom_in_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_ZOOM_IN, NULL);
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gtk_menu_item_set_accel_path(GTK_MENU_ITEM(s->zoom_in_item),
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"<QEMU>/View/Zoom In");
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gtk_accel_map_add_entry("<QEMU>/View/Zoom In", GDK_KEY_plus, GDK_CONTROL_MASK | GDK_MOD1_MASK);
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gtk_menu_append(GTK_MENU(s->view_menu), s->zoom_in_item);
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s->zoom_out_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_ZOOM_OUT, NULL);
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gtk_menu_item_set_accel_path(GTK_MENU_ITEM(s->zoom_out_item),
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"<QEMU>/View/Zoom Out");
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gtk_accel_map_add_entry("<QEMU>/View/Zoom Out", GDK_KEY_minus, GDK_CONTROL_MASK | GDK_MOD1_MASK);
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gtk_menu_append(GTK_MENU(s->view_menu), s->zoom_out_item);
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s->zoom_fixed_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_ZOOM_100, NULL);
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gtk_menu_item_set_accel_path(GTK_MENU_ITEM(s->zoom_fixed_item),
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"<QEMU>/View/Zoom Fixed");
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gtk_accel_map_add_entry("<QEMU>/View/Zoom Fixed", GDK_KEY_0, GDK_CONTROL_MASK | GDK_MOD1_MASK);
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gtk_menu_append(GTK_MENU(s->view_menu), s->zoom_fixed_item);
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s->zoom_fit_item = gtk_check_menu_item_new_with_mnemonic("Zoom To _Fit");
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gtk_menu_append(GTK_MENU(s->view_menu), s->zoom_fit_item);
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separator = gtk_separator_menu_item_new();
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gtk_menu_append(GTK_MENU(s->view_menu), separator);
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s->grab_on_hover_item = gtk_check_menu_item_new_with_mnemonic("Grab On _Hover");
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gtk_menu_append(GTK_MENU(s->view_menu), s->grab_on_hover_item);
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@ -837,6 +1058,7 @@ void gtk_display_init(DisplayState *ds)
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s->scale_x = 1.0;
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s->scale_y = 1.0;
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s->free_scale = FALSE;
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s->null_cursor = gdk_cursor_new(GDK_BLANK_CURSOR);
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@ -865,8 +1087,6 @@ void gtk_display_init(DisplayState *ds)
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gtk_notebook_set_show_tabs(GTK_NOTEBOOK(s->notebook), FALSE);
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gtk_notebook_set_show_border(GTK_NOTEBOOK(s->notebook), FALSE);
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gtk_window_set_resizable(GTK_WINDOW(s->window), FALSE);
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gd_update_caption(s);
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gtk_box_pack_start(GTK_BOX(s->vbox), s->menu_bar, FALSE, TRUE, 0);
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