diff -r 000000000000 -r 804d8803eade ui/qt/container.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/qt/container.cpp	Wed Dec 09 11:32:01 2020 +0100
@@ -0,0 +1,256 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include "container.h"
+
+#include <QSpacerItem>
+#include <QStackedWidget>
+
+
+/* -------------------- UiBoxContainer -------------------- */
+
+UiBoxContainer::UiBoxContainer(QBoxLayout* box) {
+    this->current = NULL;
+    this->menu = NULL;
+    this->box = box;
+    box->setContentsMargins(QMargins(0,0,0,0));
+    box->setSpacing(0);
+    
+    ui_reset_layout(layout);
+}
+
+void UiBoxContainer::add(QWidget* widget, bool fill) {
+    if(layout.fill != UI_LAYOUT_UNDEFINED) {
+        fill = ui_lb2bool(layout.fill);
+    }
+    
+    if(hasStretchedWidget && fill) {
+        fill = false;
+        fprintf(stderr, "UiError: container has 2 filled widgets");
+    }
+    
+    box->addWidget(widget, fill);
+    
+    if(!hasStretchedWidget) {
+        QSpacerItem *newspace = new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
+        box->removeItem(space);
+        box->addSpacerItem(newspace);
+        space = newspace; 
+    }
+    
+    if(fill) {
+        hasStretchedWidget = true;
+    }
+    ui_reset_layout(layout);
+    current = widget;
+}
+
+UIWIDGET ui_box(UiObject *obj, QBoxLayout::Direction dir) {
+    UiContainer *ct = uic_get_current_container(obj);
+    QWidget *widget = new QWidget();
+    QBoxLayout *box = new QBoxLayout(dir);
+    widget->setLayout(box);
+    ct->add(widget, true);
+    
+    UiObject *newobj = uic_object_new(obj, widget);
+    newobj->container = new UiBoxContainer(box);
+    uic_obj_add(obj, newobj);
+    
+    return widget;
+}
+
+UIWIDGET ui_vbox(UiObject *obj) {
+    return ui_box(obj, QBoxLayout::TopToBottom);
+}
+
+UIWIDGET ui_hbox(UiObject *obj) {
+    return ui_box(obj, QBoxLayout::LeftToRight);
+}
+
+
+
+/* -------------------- UiGridContainer -------------------- */
+
+UiGridContainer::UiGridContainer(QGridLayout* grid, int margin, int columnspacing, int rowspacing) {
+    this->current = NULL;
+    this->menu = NULL;
+    this->grid = grid;
+    grid->setContentsMargins(QMargins(margin, margin, margin, margin));
+    grid->setHorizontalSpacing(columnspacing);
+    grid->setVerticalSpacing(rowspacing);
+    ui_reset_layout(layout);
+}
+
+void UiGridContainer::add(QWidget* widget, bool fill) {
+    if(layout.newline) {
+        x = 0;
+        y++;
+    }
+    
+    Qt::Alignment alignment = Qt::AlignTop;
+    grid->setColumnStretch(x, layout.hexpand ? 1 : 0);
+    if(layout.vexpand) {
+        grid->setRowStretch(y, 1);
+        alignment = 0;
+    } else {
+        grid->setRowStretch(y, 0);
+    }
+    
+    int gwidth = layout.gridwidth > 0 ? layout.gridwidth : 1;
+    
+    grid->addWidget(widget, y, x, 1, gwidth, alignment);
+    x += gwidth;
+    
+    ui_reset_layout(layout);
+    current = widget;
+}
+
+UIWIDGET ui_grid(UiObject *obj) {
+    return ui_grid_sp(obj, 0, 0, 0);
+}
+
+UIWIDGET ui_grid_sp(UiObject *obj, int margin, int columnspacing, int rowspacing) {
+    UiContainer *ct = uic_get_current_container(obj);
+    QWidget *widget = new QWidget();
+    QGridLayout *grid = new QGridLayout();
+    widget->setLayout(grid);
+    ct->add(widget, true);
+    
+    UiObject *newobj = uic_object_new(obj, widget);
+    newobj->container = new UiGridContainer(grid, margin, columnspacing, rowspacing);
+    uic_obj_add(obj, newobj);
+    
+    return widget;
+}
+
+
+/* -------------------- UiTabViewContainer -------------------- */
+
+UiTabViewContainer::UiTabViewContainer(QTabWidget* tabwidget) {
+    this->current = NULL;
+    this->menu = NULL;
+    this->tabwidget = tabwidget;
+}
+
+void UiTabViewContainer::add(QWidget* widget, bool fill) {
+    QString str = QString::fromUtf8(layout.label);
+    tabwidget->addTab(widget, str);
+}
+
+
+/* -------------------- UiStackContainer -------------------- */
+
+UiStackContainer::UiStackContainer(QStackedWidget *stack) {
+    this->stack = stack;
+}
+
+void UiStackContainer::add(QWidget* widget, bool fill) {
+    stack->addWidget(widget);
+    current = widget;
+}
+
+UIWIDGET ui_tabview(UiObject *obj) {
+    QStackedWidget *tabwidget = new QStackedWidget();
+    
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->add(tabwidget, true);
+    
+    UiObject *tabviewobj = uic_object_new(obj, tabwidget);
+    tabviewobj->container = new UiStackContainer(tabwidget);
+    uic_obj_add(obj, tabviewobj);
+    
+    return tabwidget;
+}
+
+void ui_tab(UiObject *obj, char *title) {
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->layout.label = title;
+    ui_vbox(obj);
+}
+
+void ui_select_tab(UIWIDGET tabview, int tab) {
+    QStackedWidget *w = (QStackedWidget*)tabview;
+    w->setCurrentIndex(tab);
+}
+
+
+/* -------------------- UiSidebarContainer -------------------- */
+
+UiSidebarContainer::UiSidebarContainer(QSplitter *splitter) {
+    this->splitter = splitter;
+}
+
+UIWIDGET ui_sidebar(UiObject *obj) {
+    QSplitter *splitter = new QSplitter(Qt::Horizontal);
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->add(splitter, true);
+    
+    UiObject *left = uic_object_new(obj, splitter);
+    left->container = new UiSidebarContainer(splitter);
+    
+    UiObject *right = uic_object_new(obj, splitter);
+    right->container = new UiSidebarContainer(splitter);
+    
+    uic_obj_add(obj, right);
+    uic_obj_add(obj, left);
+    
+    return splitter;
+}
+
+void UiSidebarContainer::add(QWidget *widget, bool fill) {
+    splitter->addWidget(widget);
+}
+
+
+/* -------------------- layout functions -------------------- */
+
+void ui_layout_fill(UiObject *obj, UiBool fill) {
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->layout.fill = ui_bool2lb(fill);
+}
+
+void ui_layout_hexpand(UiObject *obj, UiBool expand) {
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->layout.hexpand = expand;
+}
+
+void ui_layout_vexpand(UiObject *obj, UiBool expand) {
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->layout.vexpand = expand;
+}
+
+void ui_layout_gridwidth(UiObject *obj, int width) {
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->layout.gridwidth = width;
+}
+
+void ui_newline(UiObject *obj) {
+    UiContainer *ct = uic_get_current_container(obj);
+    ct->layout.newline = TRUE;
+}