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eeshow/gui.c: zoom to extents on [*] and when showing a new sheet

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This commit is contained in:
Werner Almesberger 2016-08-03 13:05:30 -03:00
parent 7630325ae6
commit 92a0cfab4b
1 changed files with 25 additions and 3 deletions
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28
eeshow/gui.c
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@ -176,8 +176,8 @@ static void render(struct gui_ctx *ctx, struct gui_sheet *sheet)
static void canvas_coord(const struct gui_ctx *ctx,
int ex, int ey, int *x, int *y)
{
int sx, sy;
GtkAllocation alloc;
int sx, sy;
gtk_widget_get_allocation(ctx->da, &alloc);
sx = ex - alloc.width / 2;
@ -247,6 +247,24 @@ static void zoom_out(struct gui_ctx *ctx, int x, int y)
}
static void zoom_to_extents(struct gui_ctx *ctx)
{
const struct gui_sheet *sheet = ctx->curr_sheet;
GtkAllocation alloc;
ctx->x = sheet->w / 2;
ctx->y = sheet->h / 2;
gtk_widget_get_allocation(ctx->da, &alloc);
ctx->zoom = 0;
while (sheet->w >> ctx->zoom > alloc.width ||
sheet->h >> ctx->zoom > alloc.height)
ctx->zoom++;
gtk_widget_queue_draw(ctx->da);
}
/* ----- Event handlers ---------------------------------------------------- */
@ -328,12 +346,15 @@ static gboolean key_press_event(GtkWidget *widget, GdkEventKey *event,
case '-':
zoom_out(ctx, x, y);
break;
case '*':
zoom_to_extents(ctx);
break;
case GDK_KEY_BackSpace:
case GDK_KEY_Delete:
if (sheet->prev) {
ctx->curr_sheet = sheet->prev;
sheet->prev = NULL;
gtk_widget_queue_draw(ctx->da);
zoom_to_extents(ctx);
}
break;
case GDK_KEY_q:
@ -377,7 +398,7 @@ static void select_subsheet(struct gui_ctx *ctx, void *user)
if (sheet->sch == obj->u.sheet.sheet) {
sheet->prev = ctx->curr_sheet;
ctx->curr_sheet = sheet;
gtk_widget_queue_draw(ctx->da);
zoom_to_extents(ctx);
return;
}
abort();
@ -479,6 +500,7 @@ int gui(const struct sheet *sheets)
gtk_window_set_title(GTK_WINDOW(window), "eeshow");
gtk_widget_show_all(window);
zoom_to_extents(&ctx);
gtk_main();