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GitHub Repository: hrydgard/ppsspp
 Path: blob/master/UI/JoystickHistoryView.cpp
Views: 1401
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#include <algorithm>

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#include "UI/JoystickHistoryView.h"

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#include "Common/UI/Context.h"

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#include "Common/UI/UI.h"

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#include "Core/ControlMapper.h"

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void JoystickHistoryView::Draw(UIContext &dc) {

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	const AtlasImage *image = dc.Draw()->GetAtlas()->getImage(ImageID("I_CROSS"));

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	if (!image) {

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		return;

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	}

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	float minRadius = std::min(bounds_.w, bounds_.h) * 0.5f - image->w;

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	dc.Begin();

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	Bounds textBounds(bounds_.x, bounds_.centerY() + minRadius + 5.0, bounds_.w, bounds_.h / 2 - minRadius - 5.0);

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	dc.DrawTextShadowRect(title_, textBounds, 0xFFFFFFFF, ALIGN_TOP | ALIGN_HCENTER | FLAG_WRAP_TEXT);

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	dc.Flush();

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	dc.BeginNoTex();

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	dc.Draw()->RectOutline(bounds_.centerX() - minRadius, bounds_.centerY() - minRadius, minRadius * 2.0f, minRadius * 2.0f, 0x80FFFFFF);

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	dc.Flush();

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	dc.Begin();

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	// First draw a grid.

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	float dx = 1.0f / 10.0f;

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	for (int ix = -10; ix <= 10; ix++) {

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		// First draw vertical lines.

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		float fx = ix * dx;

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		for (int iy = -10; iy < 10; iy++) {

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			float ax = fx;

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			float ay = iy * dx;

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			float bx = fx;

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			float by = (iy + 1) * dx;

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			if (type_ == StickHistoryViewType::OUTPUT) {

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				ConvertAnalogStick(ax, ay, &ax, &ay);

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				ConvertAnalogStick(bx, by, &bx, &by);

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			}

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			ax = ax * minRadius + bounds_.centerX();

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			ay = ay * minRadius + bounds_.centerY();

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			bx = bx * minRadius + bounds_.centerX();

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			by = by * minRadius + bounds_.centerY();

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			dc.Draw()->Line(dc.theme->whiteImage, ax, ay, bx, by, 1.0, 0x70FFFFFF);

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		}

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	}

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	for (int iy = -10; iy <= 10; iy++) {

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		// Then horizontal.

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		float fy = iy * dx;

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		for (int ix = -10; ix < 10; ix++) {

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			float ax = ix * dx;

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			float ay = fy;

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			float bx = (ix + 1) * dx;

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			float by = fy;

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			if (type_ == StickHistoryViewType::OUTPUT) {

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				ConvertAnalogStick(ax, ay, &ax, &ay);

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				ConvertAnalogStick(bx, by, &bx, &by);

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			}

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			ax = ax * minRadius + bounds_.centerX();

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			ay = ay * minRadius + bounds_.centerY();

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			bx = bx * minRadius + bounds_.centerX();

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			by = by * minRadius + bounds_.centerY();

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			dc.Draw()->Line(dc.theme->whiteImage, ax, ay, bx, by, 1.0, 0x70FFFFFF);

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		}

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	}

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	int a = maxCount_ - (int)locations_.size();

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	for (auto iter = locations_.begin(); iter != locations_.end(); ++iter) {

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		float x = bounds_.centerX() + minRadius * iter->x;

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		float y = bounds_.centerY() - minRadius * iter->y;

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		float alpha = (float)a / (float)(maxCount_ - 1);

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		if (alpha < 0.0f) {

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			alpha = 0.0f;

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		}

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		// Emphasize the newest (higher) ones.

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		alpha = powf(alpha, 3.7f);

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		// Highlight the output (and OTHER)

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		if (alpha >= 1.0f && type_ != StickHistoryViewType::INPUT) {

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			dc.Draw()->DrawImage(ImageID("I_CIRCLE"), x, y, 1.0f, colorAlpha(0xFFFFFF, 1.0), ALIGN_CENTER);

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		} else {

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			dc.Draw()->DrawImage(ImageID("I_CIRCLE"), x, y, 0.8f, colorAlpha(0xC0C0C0, alpha * 0.5f), ALIGN_CENTER);

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		}

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		a++;

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	}

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	dc.Flush();

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}

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void JoystickHistoryView::Update() {

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	locations_.push_back(Location{ curX_, curY_ });

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	if ((int)locations_.size() > maxCount_) {

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		locations_.pop_front();

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	}

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}

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