Hi; On 10 September 2015 at 15:06, richard boaz <ivor.b...@gmail.com> wrote:
After some google-reading, it seems that with GTK-3, control of frame > decorations has been 100% given over to whatever WM is running whatever > theme. > The WM is not involved in the least. The theme involved is the GTK+ one. To be fair, the shadow style was always left to the theme, even in the GTK+ 2.x days. These days, mapping all possible border size, shadow, and color combinations to a simple flat enumeration is impossible without having a combinatorial explosion of values. We have a better way, with CSS, to express that. My first question to the general list is to wonder if anyone has found a > work-around for this. Investigating the documentation turns up nothing > obvious in possible alternatives. > You can add your own CSS styling to get the border you wish. > Barring some other way of achieving what's *required *for my app, I'm > dying to know how this evolution of functionality is a good idea. A bug > was reported for this (https://bugzilla.gnome.org/show_bug.cgi?id=659926) > where this has been marked as WONTFIX, since this seems to have been simply > given over to the theme engine's own nefarious intent. > Please, let's not be overly melodramatic. No need to infer "nefarious" intents. The theme is responsible for the styling of everything you see on the screen; it makes sense to have the theme in charge of the border of a frame. Since it's part of the theme, it also means you can override it with a custom set of CSS rules, instead of having to patch GTK or your application. > But I don't entirely understand this: the above two plots are generated > using the same WM on the same box, at exactly the same time, so something > has obviously changed between GTK-2 and GTK-3, where program control of how > an app's internal widgets *must* be displayed has simply vanished. > The whole theme system has changed between GTK 2.x and GTK 3.x, so, yes: you could say that something has changed. > So, how am I supposed to provide a GtkGrid of drawing areas where I'm > actually able to distinguish to the user the borders between them? > Add a style class to your GtkFrame, using the gtk_style_context_add_class() API on the GtkStyleContext of your widget, or by by using the <style><class name=''/></style> stanza in the GtkBuilder XML, depending on what you use to build your UI. When launching your application, create a GtkCssProvider and load a CSS snippet; something like: .my-drawing-area-frame { border: 1px red; padding: 6px; } and use gtk_style_context_add_provider_for_screen() to associate the GtkCssProvider to the default screen. This will ensure that all widgets with a style class of 'my-drawing-area-frame' will have a red, 1 pixel border, and a padding of 6 pixels. Ciao, Emmanuele. -- https://www.bassi.io [@] ebassi [@gmail.com]
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