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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef QWASMWINDOWNONCLIENTAREA_H
#define QWASMWINDOWNONCLIENTAREA_H
#include <QtCore/qrect.h>
#include <QtCore/qtconfigmacros.h>
#include <QtCore/qnamespace.h>
#include <emscripten/val.h>
#include <functional>
#include <memory>
#include <string_view>
#include <vector>
QT_BEGIN_NAMESPACE
namespace qstdweb {
class EventCallback;
}
struct PointerEvent;
class QWindow;
class Resizer;
class TitleBar;
class QWasmWindow;
class NonClientArea
{
public:
NonClientArea(QWasmWindow *window, emscripten::val containerElement);
~NonClientArea();
void onClientAreaWidthChange(int width);
void propagateSizeHints();
TitleBar *titleBar() const { return m_titleBar.get(); }
private:
void updateResizability();
emscripten::val m_qtWindowElement;
std::unique_ptr<Resizer> m_resizer;
std::unique_ptr<TitleBar> m_titleBar;
};
class WebImageButton
{
public:
class Callbacks
{
public:
Callbacks();
Callbacks(std::function<void()> onInteraction, std::function<void()> onClick);
~Callbacks();
Callbacks(const Callbacks &) = delete;
Callbacks(Callbacks &&);
Callbacks &operator=(const Callbacks &) = delete;
Callbacks &operator=(Callbacks &&);
operator bool() const { return !!m_onInteraction; }
void onInteraction();
void onClick();
private:
std::function<void()> m_onInteraction;
std::function<void()> m_onClick;
};
WebImageButton();
~WebImageButton();
void setCallbacks(Callbacks callbacks);
void setImage(std::string_view imageData, std::string_view format);
void setVisible(bool visible);
emscripten::val htmlElement() const { return m_containerElement; }
emscripten::val imageElement() const { return m_imgElement; }
private:
emscripten::val m_containerElement;
emscripten::val m_imgElement;
std::unique_ptr<qstdweb::EventCallback> m_webMouseMoveEventCallback;
std::unique_ptr<qstdweb::EventCallback> m_webMouseDownEventCallback;
std::unique_ptr<qstdweb::EventCallback> m_webClickEventCallback;
Callbacks m_callbacks;
};
struct ResizeConstraints {
QPoint minShrink;
QPoint maxGrow;
int maxGrowTop;
};
class Resizer
{
public:
class ResizerElement
{
public:
static constexpr const char *cssClassNameForEdges(Qt::Edges edges)
{
switch (edges) {
case Qt::TopEdge | Qt::LeftEdge:;
return "nw";
case Qt::TopEdge:
return "n";
case Qt::TopEdge | Qt::RightEdge:
return "ne";
case Qt::LeftEdge:
return "w";
case Qt::RightEdge:
return "e";
case Qt::BottomEdge | Qt::LeftEdge:
return "sw";
case Qt::BottomEdge:
return "s";
case Qt::BottomEdge | Qt::RightEdge:
return "se";
default:
return "";
}
}
ResizerElement(emscripten::val parentElement, Qt::Edges edges, Resizer *resizer);
~ResizerElement();
ResizerElement(const ResizerElement &other) = delete;
ResizerElement(ResizerElement &&other);
ResizerElement &operator=(const ResizerElement &other) = delete;
ResizerElement &operator=(ResizerElement &&other) = delete;
bool onPointerDown(const PointerEvent &event);
bool onPointerMove(const PointerEvent &event);
bool onPointerUp(const PointerEvent &event);
private:
emscripten::val m_element;
int m_capturedPointerId = -1;
const Qt::Edges m_edges;
Resizer *m_resizer;
std::unique_ptr<qstdweb::EventCallback> m_mouseDownEvent;
std::unique_ptr<qstdweb::EventCallback> m_mouseMoveEvent;
std::unique_ptr<qstdweb::EventCallback> m_mouseUpEvent;
};
using ClickCallback = std::function<void()>;
Resizer(QWasmWindow *window, emscripten::val parentElement);
~Resizer();
ResizeConstraints getResizeConstraints();
private:
void onInteraction();
void startResize(Qt::Edges resizeEdges, const PointerEvent &event);
void continueResize(const PointerEvent &event);
void finishResize();
struct ResizeData
{
Qt::Edges edges = Qt::Edges::fromInt(0);
QPointF originInScreenCoords;
QPoint minShrink;
QPoint maxGrow;
QRect initialBounds;
};
std::unique_ptr<ResizeData> m_currentResizeData;
QWasmWindow *m_window;
emscripten::val m_windowElement;
std::vector<std::unique_ptr<ResizerElement>> m_elements;
};
class TitleBar
{
public:
TitleBar(QWasmWindow *window, emscripten::val parentElement);
~TitleBar();
void setTitle(const QString &title);
void setRestoreVisible(bool visible);
void setMaximizeVisible(bool visible);
void setCloseVisible(bool visible);
void setIcon(std::string_view imageData, std::string_view format);
void setWidth(int width);
QRectF geometry() const;
private:
bool onPointerDown(const PointerEvent &event);
bool onPointerMove(const PointerEvent &event);
bool onPointerUp(const PointerEvent &event);
bool onDoubleClick();
QPointF clipPointWithScreen(const QPointF &pointInTitleBarCoords) const;
QWasmWindow *m_window;
emscripten::val m_element;
emscripten::val m_label;
std::unique_ptr<WebImageButton> m_close;
std::unique_ptr<WebImageButton> m_maximize;
std::unique_ptr<WebImageButton> m_restore;
std::unique_ptr<WebImageButton> m_icon;
int m_capturedPointerId = -1;
QPointF m_moveStartPoint;
QPoint m_moveStartWindowPosition;
std::unique_ptr<qstdweb::EventCallback> m_mouseDownEvent;
std::unique_ptr<qstdweb::EventCallback> m_mouseMoveEvent;
std::unique_ptr<qstdweb::EventCallback> m_mouseUpEvent;
std::unique_ptr<qstdweb::EventCallback> m_doubleClickEvent;
};
QT_END_NAMESPACE
#endif // QWASMWINDOWNONCLIENTAREA_H
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