margin-control.c

#include "gtk-layer-demo.h"

static void on_orientation_changed(GtkWindow* _window, WindowOrientation orientation, GtkWidget* box) {
    (void)_window;

    switch (orientation) {
        case WINDOW_ORIENTATION_HORIZONTAL:
            gtk_orientable_set_orientation(GTK_ORIENTABLE(box), GTK_ORIENTATION_HORIZONTAL);
            break;
        case WINDOW_ORIENTATION_VERTICAL:
            gtk_orientable_set_orientation(GTK_ORIENTABLE(box), GTK_ORIENTATION_VERTICAL);
            break;
        case WINDOW_ORIENTATION_NONE:
            gtk_orientable_set_orientation(GTK_ORIENTABLE(box), GTK_ORIENTATION_VERTICAL);
            break;
    }
}

typedef struct {
    GtkLayerShellEdge edge;
    GtkWindow* layer_window;
} MarginSpinButtonData;

static void on_margin_changed(GtkSpinButton* button, MarginSpinButtonData* data) {
    int value = gtk_spin_button_get_value(button);
    gtk_layer_set_margin(data->layer_window, data->edge, value);
}

static GtkWidget* margin_spin_button_new(
    GtkWindow* layer_window,
    GtkLayerShellEdge edge,
    const char* tooltip,
    const int default_margins[GTK_LAYER_SHELL_EDGE_ENTRY_NUMBER]
) {
    GtkAdjustment* adjustment = gtk_adjustment_new(default_margins[edge], 0.0, 4000.0, 20.0, 50.0, 0.0);
    GtkWidget* button = gtk_spin_button_new(adjustment, 0.5, 0);
    gtk_widget_set_tooltip_text(button, tooltip);
    MarginSpinButtonData* data = g_new0(MarginSpinButtonData, 1);
    *data = (MarginSpinButtonData) {
        .edge = edge,
        .layer_window = layer_window,
    };
    g_object_set_data_full(G_OBJECT(button), "value-changed_signal_data", data, (GDestroyNotify)g_free);
    g_signal_connect(button, "value-changed", G_CALLBACK(on_margin_changed), data);
    return button;
}

GtkWidget* margin_control_new(GtkWindow* layer_window, const int default_margins[GTK_LAYER_SHELL_EDGE_ENTRY_NUMBER]) {
    const int spacing = 4;
    GtkWidget* switch_box = gtk_box_new(GTK_ORIENTATION_VERTICAL, spacing);
    g_signal_connect(layer_window, "orientation-changed", G_CALLBACK(on_orientation_changed), switch_box); {
        GtkWidget* vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, spacing);
        gtk_box_append(GTK_BOX(switch_box), vbox); {
            GtkWidget* button = margin_spin_button_new(layer_window, GTK_LAYER_SHELL_EDGE_LEFT, "Left margin", default_margins);
            gtk_box_append(GTK_BOX(vbox), button);
        } {
            GtkWidget* button = margin_spin_button_new(layer_window, GTK_LAYER_SHELL_EDGE_RIGHT, "Right margin", default_margins);
            gtk_box_append(GTK_BOX(vbox), button);
        }
    } {
        GtkWidget* vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, spacing);
        gtk_box_append(GTK_BOX(switch_box), vbox); {
            GtkWidget* button = margin_spin_button_new(layer_window, GTK_LAYER_SHELL_EDGE_TOP, "Top margin", default_margins);
            gtk_box_append(GTK_BOX(vbox), button);
        } {
            GtkWidget* button = margin_spin_button_new(layer_window, GTK_LAYER_SHELL_EDGE_BOTTOM, "Bottom margin", default_margins);
            gtk_box_append(GTK_BOX(vbox), button);
        }
    }

    GtkWidget* popover = gtk_popover_new();
    gtk_popover_set_child(GTK_POPOVER(popover), switch_box);
    GtkWidget* open_button = gtk_menu_button_new();
    gtk_menu_button_set_label(GTK_MENU_BUTTON(open_button), "Set margin");
    gtk_menu_button_set_popover(GTK_MENU_BUTTON(open_button), popover);
    gtk_widget_set_tooltip_text(open_button, "Space to leave empty around surface");
    return open_button;
}