move options framework into its own library

- adjust usages
- add support for QList signals and metatype

1 files changed, 212 insertions, 0 deletions

diff --git a/options/tie.hpp b/options/tie.hpp
new file mode 100644
index 00000000..2969f8d4
--- /dev/null
+++ b/options/tie.hpp
@@ -0,0 +1,212 @@
+#pragma once
+
+#include "value.hpp"
+
+#include <QComboBox>
+#include <QCheckBox>
+#include <QDoubleSpinBox>
+#include <QSpinBox>
+#include <QSlider>
+#include <QLineEdit>
+#include <QLabel>
+#include <QTabWidget>
+
+#include <cmath>
+
+namespace options {
+
+template<typename t, typename q>
+inline void tie_setting(value<t>&, q*);
+
+template<typename t>
+inline
+typename std::enable_if<std::is_enum<t>::value>::type
+tie_setting(value<t>& v, QComboBox* cb)
+{
+    cb->setCurrentIndex(cb->findData((unsigned)static_cast<t>(v)));
+    v = static_cast<t>(cb->currentData().toInt());
+
+    // QObject::connect plays badly with std::bind of std::shared_ptr. Data seems to get freed.
+    // Direct accesses of cb->currentData within arbitrary thread context cause crashes as well.
+    // Hence we go for a verbose implementation.
+
+    std::vector<int> enum_cases;
+    enum_cases.reserve(unsigned(cb->count()));
+
+    for (int i = 0; i < cb->count(); i++)
+        enum_cases.push_back(cb->itemData(i).toInt());
+
+    struct fn1
+    {
+        value<t>& v;
+        QComboBox* cb;
+        std::vector<int> enum_cases;
+
+        fn1(value<t>& v, QComboBox* cb, const std::vector<int>& enum_cases) :
+            v(v),
+            cb(cb),
+            enum_cases(enum_cases)
+        {
+        }
+
+        void operator()(int idx)
+        {
+            if (idx < 0 || idx >= (int)enum_cases.size())
+                v = static_cast<t>(-1);
+            else
+                v = static_cast<t>(t(std::intptr_t(enum_cases[idx])));
+        }
+    };
+
+    struct fn2
+    {
+        value<t>& v;
+        QComboBox* cb;
+        std::vector<int> enum_cases;
+
+        fn2(value<t>& v, QComboBox* cb, const std::vector<int>& enum_cases) :
+            v(v),
+            cb(cb),
+            enum_cases(enum_cases)
+        {
+        }
+
+        void operator()(int val)
+        {
+            for (unsigned i = 0; i < enum_cases.size(); i++)
+            {
+                if (val == enum_cases[i])
+                {
+                    cb->setCurrentIndex(i);
+                    return;
+                }
+            }
+            cb->setCurrentIndex(-1);
+        }
+    };
+
+    base_value::connect(cb,
+                        static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
+                        &v,
+                        fn1(v, cb, enum_cases),
+                        v.DIRECT_CONNTYPE);
+    base_value::connect(&v,
+                        static_cast<void (base_value::*)(int)>(&base_value::valueChanged),
+                        cb,
+                        fn2(v, cb, enum_cases),
+                        v.DIRECT_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<int>& v, QComboBox* cb)
+{
+    cb->setCurrentIndex(v);
+    v = cb->currentIndex();
+    base_value::connect(cb, SIGNAL(currentIndexChanged(int)), &v, SLOT(setValue(int)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(int)), cb, SLOT(setCurrentIndex(int)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<QString>& v, QComboBox* cb)
+{
+    cb->setCurrentText(v);
+    v = cb->currentText();
+    base_value::connect(cb, SIGNAL(currentTextChanged(QString)), &v, SLOT(setValue(QString)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(QString)), cb, SLOT(setCurrentText(QString)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<bool>& v, QCheckBox* cb)
+{
+    cb->setChecked(v);
+    base_value::connect(cb, SIGNAL(toggled(bool)), &v, SLOT(setValue(bool)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(bool)), cb, SLOT(setChecked(bool)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<double>& v, QDoubleSpinBox* dsb)
+{
+    dsb->setValue(v);
+    base_value::connect(dsb, SIGNAL(valueChanged(double)), &v, SLOT(setValue(double)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(double)), dsb, SLOT(setValue(double)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<int>& v, QSpinBox* sb)
+{
+    sb->setValue(v);
+    base_value::connect(sb, SIGNAL(valueChanged(int)), &v, SLOT(setValue(int)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(int)), sb, SLOT(setValue(int)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<int>& v, QSlider* sl)
+{
+    sl->setValue(v);
+    v = sl->value();
+    base_value::connect(sl, SIGNAL(valueChanged(int)), &v, SLOT(setValue(int)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(int)), sl, SLOT(setValue(int)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<QString>& v, QLineEdit* le)
+{
+    le->setText(v);
+    base_value::connect(le, SIGNAL(textChanged(QString)), &v, SLOT(setValue(QString)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(QString)),le, SLOT(setText(QString)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<QString>& v, QLabel* lb)
+{
+    lb->setText(v);
+    base_value::connect(&v, SIGNAL(valueChanged(QString)), lb, SLOT(setText(QString)), v.DIRECT_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<int>& v, QTabWidget* t)
+{
+    t->setCurrentIndex(v);
+    base_value::connect(t, SIGNAL(currentChanged(int)), &v, SLOT(setValue(int)), v.DIRECT_CONNTYPE);
+    base_value::connect(&v, SIGNAL(valueChanged(int)), t, SLOT(setCurrentIndex(int)), v.SAFE_CONNTYPE);
+}
+
+template<>
+inline void tie_setting(value<slider_value>& v, QSlider* w)
+{
+    // we can't get these at runtime since signals cross threads
+    const int q_min = w->minimum();
+    const int q_max = w->maximum();
+    const int q_diff = q_max - q_min;
+
+    slider_value sv(v);
+
+    const double sv_c = sv.max() - sv.min();
+
+    using std::round;
+
+    w->setValue(int((sv.cur() - sv.min()) / sv_c * q_diff + q_min));
+    v = slider_value(q_diff <= 0 ? 0 : (w->value() - q_min) * sv_c / (double)q_diff + sv.min(), sv.min(), sv.max());
+
+    base_value::connect(w,
+                        &QSlider::valueChanged,
+                        &v,
+                        [=, &v](int pos) {
+                                const int q_diff = q_max - q_min;
+                                if (q_diff <= 0 || pos <= 0)
+                                    v = slider_value(sv.min(), sv.min(), sv.max());
+                                else
+                                {
+                                    const float c = float(sv.max()-sv.min());
+                                    v = slider_value((pos - q_min) * c / (float)q_diff + float(sv.min()), sv.min(), sv.max());
+                                }
+                        },
+                        v.DIRECT_CONNTYPE);
+    base_value::connect(&v,
+                        static_cast<void(base_value::*)(double)>(&base_value::valueChanged),
+                        w,
+                        [=](double value) { w->setValue(int(round(value * q_diff) + q_min)); },
+    v.SAFE_CONNTYPE);
+}
+
+}