(旧Siv3D) タイトルバーと閉じるボタンを独自に実装する

https://gyazo.com/aa0abf96c077aaf66f6d43e8bc95055a

code:siv3d_custom_titlebar.cpp

class Titlebar

{

public:

Titlebar(

const int height = 24,

const int margin = 2,

const Color color = Palette::Mediumorchid,

const Color fontColor = Palette::White,

const Color shadowColor = Palette::Black)

: height_(height), margin_(margin), color_(color), fontColor_(fontColor), shadowColor_(shadowColor), grab_(),

font_(11, Typeface::Heavy, FontStyle::Bold)

{

}

// * call every frame *

void update()

{

const RectF bar = region();

// d&d move window

if (bar.leftPressed && !grab_) {

grab_ = Mouse::Pos();

}

if (grab_) {

if (!Input::MouseL.pressed) {

grab_ = none;

}

else {

Window::SetPos(Mouse::ScreenPos().movedBy(-grab_.value()));

}

}

}

void draw()

{

const RectF bar = region();

bar.draw(color_);

// highlight

if (grab_) {

bar.draw({ 0U,0U,0U,32U });

}

else if (bar.mouseOver) {

bar.draw({ 255U,255U,255U,32U });

}

font_(Window::GetTitle()).drawCenter(bar.center.movedBy(2, 2), shadowColor_);

font_(Window::GetTitle()).drawCenter(bar.center, fontColor_);

}

const RectF region()

{

return RectF(Window::Size().x - margin_ * 2, height_).movedBy(margin_, margin_);

}

private:

int height_;

int margin_;

Color color_;

Color fontColor_;

Color shadowColor_;

Optional<Point> grab_;

Font font_;

};

class CloseButton

{

public:

CloseButton(const Vec2 pos, const int buttonSize = 24, const double crossSize = 8.0, const double crossWidth = 3.0)

: pos_(pos), buttonSize_(buttonSize), crossSize_(crossSize), crossWidth_(crossWidth)

{

}

const bool clicked()

{

return region().leftClicked;

}

void draw()

{

const RectF button = region();

Polygon polyCross = Geometry2D::CreatePlus(8, 3.0).rotated(45_deg);

polyCross.movedBy(button.center).draw(Palette::Indigo);

// highlight

if (button.mouseOver) {

button.draw({ 255U,255U,255U, 64U + 32U * ((System::FrameCount() / 4) % 2) });

}

}

const RectF region()

{

return RectF(buttonSize_).movedBy(pos_);

}

private:

Vec2 pos_;

int buttonSize_;

double crossSize_;

double crossWidth_;

};

void Main()

{

Window::SetStyle(WindowStyle::NonFrame);

Window::Resize(640, 480);

const int titlebarHeight = 24;

const int titlebarMargin = 2;

Titlebar titlebar(titlebarHeight, titlebarMargin);

const int closebuttonSize = titlebarHeight;

CloseButton closebutton(titlebar.region().tr.movedBy(-closebuttonSize, 0), closebuttonSize);

while (System::Update())

{

if (closebutton.clicked()) {

// quit app

break;

}

titlebar.update();

RectF(Window::Size()).draw(Palette::Black); // draw bg

titlebar.draw();

closebutton.draw();

}

}