66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#pragma once
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#include "base/algorithm.h"
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#include <QtCore/QSize>
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#include <algorithm>
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#include <cmath>
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namespace style {
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inline constexpr auto kScaleAuto = 0;
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inline constexpr auto kScaleMin = 50;
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inline constexpr auto kScaleDefault = 100;
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inline constexpr auto kScaleMax = 300;
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[[nodiscard]] int DevicePixelRatio();
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void SetDevicePixelRatio(int ratio);
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[[nodiscard]] int Scale();
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void SetScale(int scale);
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[[nodiscard]] inline int CheckScale(int scale) {
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return (scale == kScaleAuto)
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? kScaleAuto
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: std::clamp(scale, kScaleMin, kScaleMax / DevicePixelRatio());
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}
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template <typename T>
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[[nodiscard]] inline T ConvertScale(T value, int scale) {
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if (value < 0.) {
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return -ConvertScale(-value, scale);
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}
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const auto result = T(base::SafeRound(
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(double(value) * scale / 100.) - 0.01));
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return (!std::is_integral_v<T> || !value || result) ? result : 1;
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}
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template <typename T>
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[[nodiscard]] inline T ConvertScale(T value) {
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return ConvertScale(value, Scale());
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}
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template <typename T>
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[[nodiscard]] inline T ConvertScaleExact(T value, int scale) {
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return (value < 0.)
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? (-ConvertScale(-value, scale))
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: T(double(value) * scale / 100.);
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}
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template <typename T>
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[[nodiscard]] inline T ConvertScaleExact(T value) {
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return ConvertScaleExact(value, Scale());
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}
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[[nodiscard]] inline QSize ConvertScale(QSize size) {
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return QSize(ConvertScale(size.width()), ConvertScale(size.height()));
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}
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} // namespace style
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