yaw-audio/src/yaw-tab/ui.cpp

#include "DistrhoUI.hpp"
#ifdef YAW_USE_WINTAB
#include "wintab.cpp"
#endif
#ifdef YAW_USE_RTSTYLUS
#include "rtstylus.cpp"
#endif

START_NAMESPACE_DISTRHO

class TabUI : public UI
{
	static const uint kInitialWidth = 405;
	static const uint kInitialHeight = 256;

public:
	TabUI()
		: UI(kInitialWidth, kInitialHeight),
		fSampleRate(getSampleRate()),
		fResizable(isResizable()),
		fScale(1.0f),
		fScaleFactor(getScaleFactor()),
		tab(reinterpret_cast<HWND>(getWindow().getNativeWindowHandle()))
	{
		std::memset(fParameters, 0, sizeof(float) * kParameterCount);
		std::memset(fStrBuf, 0, sizeof(char) * (0xff + 1));

#ifdef DGL_NO_SHARED_RESOURCES
		createFontFromFile("sans", "/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf");
#else
		loadSharedResources();
#endif

		setGeometryConstraints(kInitialWidth, kInitialHeight, true);
	}

protected:

	void getTabletData()
	{
		//Lire donnés de la tablet
		tab.NewPacket();

		float x = static_cast<float>(tab.pkt.pkX) / tab.extX;
		float y = static_cast<float>(tab.pkt.pkY) / tab.extY;
		float z = static_cast<float>(tab.pkt.pkZ) / tab.extZ;
		float p = static_cast<float>(tab.pkt.pkNormalPressure) / tab.extP;

		if (x != fParameters[kParameterTabletX]) {
			setParameterValue(kParameterTabletX, x);
			fParameters[kParameterTabletX] = x;
		}
		if (y != fParameters[kParameterTabletY]) {
			setParameterValue(kParameterTabletY, y);
			fParameters[kParameterTabletY] = y;
		}
		if (z != fParameters[kParameterTabletZ]) {
			setParameterValue(kParameterTabletZ, z);
			fParameters[kParameterTabletZ] = z;
		}
		if (p != fParameters[kParameterTabletPressure]) {
			setParameterValue(kParameterTabletPressure, p);
			fParameters[kParameterTabletPressure] = p;
		}
	}

	void parameterChanged(uint32_t index, float value) override
	{

		if (index != kParameterTime) {
			fParameters[index] = value;
			return;
		}

		getTabletData();

		repaint();
	}


	void sampleRateChanged(double newSampleRate) override
	{
		fSampleRate = newSampleRate;
		repaint();
	}

	void uiIdle() override
	{
		getTabletData();
		repaint();
	}

	bool onMouse(const MouseEvent& ev) override
	{
		getTabletData();
		repaint();
		return false; //Allow event to propagate.
	}


	void onNanoDisplay() override
	{
		drawCircle(
			fParameters[kParameterTabletX],
			fParameters[kParameterTabletY],
			fParameters[kParameterTabletZ],
			fParameters[kParameterTabletPressure]
		);

		const float lineHeight = 20 * fScale;

		fontSize(15.0f * fScale);
		textLineHeight(lineHeight);



		float x = 0.0f * fScale;
		float y = 15.0f * fScale;

		if (!tab.wintabAvailable) {
			drawLeft(x, y, "Failed to connect to tablet.");
			return;
		}

		drawLeft(x, y, "x:");
		drawRight(x, y, getTextBufFloat(fParameters[kParameterTabletX]));
		y += lineHeight;

		drawLeft(x, y, "y:");
		drawRight(x, y, getTextBufFloat(fParameters[kParameterTabletY]));
		y += lineHeight;

		drawLeft(x, y, "z:");
		drawRight(x, y, getTextBufFloat(fParameters[kParameterTabletZ]));
		y += lineHeight;

		drawLeft(x, y, "p:");
		drawRight(x, y, getTextBufFloat(fParameters[kParameterTabletPressure]));
		y += lineHeight;

	}

	void drawCircle(float x, float y, float z, float p) {

		static constexpr float circleRadius = 25.f;
		x *= getWidth();
		y = (1.f - y) * getHeight();
		z = 1.f - z;

		beginPath();
		strokeColor(1.f, 1.f, 1.f, 0.5f);
		moveTo(x - z * circleRadius, y);
		lineTo(x + z * circleRadius, y);
		stroke();
		closePath();

		beginPath();
		strokeColor(1.f, 1.f, 1.f, 0.5f);
		moveTo(x , y - z * circleRadius);
		lineTo(x , y + z * circleRadius);
		stroke();
		closePath();

		beginPath();
		fillColor(1.f, 1.f, 1.f, p);
		strokeColor(255, 255, 255, 255);
		circle(x, y, circleRadius);
		fill();
		stroke();
		closePath();

		beginPath();
		strokeColor(1.f, 1.f, 1.f, z);
		circle(x, y, z * circleRadius);
		stroke();
		closePath();
	}

	void onResize(const ResizeEvent& ev) override
	{
		fScale = static_cast<float>(ev.size.getHeight()) / static_cast<float>(kInitialHeight);

		UI::onResize(ev);
	}

	void uiScaleFactorChanged(const double scaleFactor) override
	{
		fScaleFactor = scaleFactor;
	}

	// -------------------------------------------------------------------------------------------------------

private:
	// Parameters
	float  fParameters[kParameterCount];
	double fSampleRate;

	// UI stuff
	bool fResizable;
	float fScale; // our internal scaling
	double fScaleFactor; // host reported scale factor

	// Tablet context handler
	Tablet tab;

	// temp buf for text
	char fStrBuf[0xff + 1];

	// helpers for putting text into fStrBuf and returning it
	const char* getTextBufInt(const int value)
	{
		std::snprintf(fStrBuf, 0xff, "%i", value);
		return fStrBuf;
	}

	const char* getTextBufFloat(const float value)
	{
		std::snprintf(fStrBuf, 0xff, "%.1f", value);
		return fStrBuf;
	}

	const char* getTextBufFloatExtra(const float value)
	{
		std::snprintf(fStrBuf, 0xff, "%.2f", value + 0.001f);
		return fStrBuf;
	}

	const char* getTextBufTime(const uint64_t frame)
	{
		const uint32_t time = frame / uint64_t(fSampleRate);
		const uint32_t secs = time % 60;
		const uint32_t mins = (time / 60) % 60;
		const uint32_t hrs = (time / 3600) % 60;
		std::snprintf(fStrBuf, 0xff, "%02i:%02i:%02i", hrs, mins, secs);
		return fStrBuf;
	}

	// helpers for drawing text
	void drawLeft(float x, const float y, const char* const text, const int offset = 0)
	{
		const float width = (100.0f + offset) * fScale;
		x += offset * fScale;
		beginPath();
		fillColor(200, 200, 200);
		textAlign(ALIGN_RIGHT | ALIGN_TOP);
		textBox(x, y, width, text);
		closePath();
	}

	void drawRight(float x, const float y, const char* const text, const int offset = 0)
	{
		const float width = (100.0f + offset) * fScale;
		x += offset * fScale;
		beginPath();
		fillColor(255, 255, 255);
		textAlign(ALIGN_LEFT | ALIGN_TOP);
		textBox(x + (105 * fScale), y, width, text);
		closePath();
	}

	/**
	   Set our UI class as non-copyable and add a leak detector just in case.
	 */
	DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(TabUI)
};



UI* createUI()
{
	return new TabUI();
}


END_NAMESPACE_DISTRHO