Initial release
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//------------------------------------------------------------------------
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// This file is part of VSTGUI. It is subject to the license terms
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// in the LICENSE file found in the top-level directory of this
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// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
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// Flags : clang-format SMTGSequencer
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#pragma once
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#include "vstgui/lib/vstguifwd.h"
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#include "vstgui/lib/ccolor.h"
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#include "vstgui/lib/cview.h"
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#include "vstgui/lib/dispatchlist.h"
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#include "vstgui/lib/itouchevent.h"
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#include <array>
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#include <bitset>
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#include <map>
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namespace VSTGUI {
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//------------------------------------------------------------------------
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class KeyboardViewBase : public CView
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{
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public:
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using NoteIndex = int16_t;
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using NumNotes = uint8_t;
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static constexpr NumNotes MaxNotes = 128;
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enum class BitmapID
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{
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WhiteKeyPressed = 0,
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WhiteKeyUnpressed,
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BlackKeyPressed,
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BlackKeyUnpressed,
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WhiteKeyShadowLeft,
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WhiteKeyShadowRight,
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NumBitmaps
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};
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KeyboardViewBase ();
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void setKeyPressed (NoteIndex note, bool state);
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virtual void setKeyRange (NoteIndex startNote, NumNotes numKeys);
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NoteIndex getKeyRangeStart () const { return startNote; }
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NumNotes getNumKeys () const { return numKeys; }
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NumNotes getNumWhiteKeys () const;
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void setWhiteKeyWidth (CCoord width);
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void setBlackKeyWidth (CCoord width);
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void setBlackKeyHeight (CCoord height);
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void setLineWidth (CCoord width);
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CCoord getWhiteKeyWidth () const { return whiteKeyWidth; }
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CCoord getBlackKeyWidth () const { return blackKeyWidth; }
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CCoord getBlackKeyHeight () const { return blackKeyHeight; }
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CCoord getLineWidth () const { return lineWidth; }
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void setFrameColor (CColor color);
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void setFontColor (CColor color);
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void setWhiteKeyColor (CColor color);
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void setWhiteKeyPressedColor (CColor color);
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void setBlackKeyColor (CColor color);
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void setBlackKeyPressedColor (CColor color);
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CColor getFrameColor () const { return frameColor; }
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CColor getFontColor () const { return fontColor; }
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CColor getWhiteKeyColor () const { return whiteKeyColor; }
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CColor getWhiteKeyPressedColor () const { return whiteKeyPressedColor; }
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CColor getBlackKeyColor () const { return blackKeyColor; }
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CColor getBlackKeyPressedColor () const { return blackKeyPressedColor; }
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void setNoteNameFont (CFontDesc* font);
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CFontDesc* getNoteNameFont () const { return noteNameFont; }
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void setDrawNoteText (bool state);
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bool getDrawNoteText () const { return drawNoteText; }
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void setBitmap (BitmapID bID, CBitmap* bitmap);
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CBitmap* getBitmap (BitmapID bID) const;
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void setWhiteKeyBitmapInset (const CRect& inset); // TODO: uidesc
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void setBlackKeyBitmapInset (const CRect& inset); // TODO: uidesc
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const CRect& getNoteRect (NoteIndex note) const { return noteRectCache[note]; }
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bool isWhiteKey (NoteIndex note) const;
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void drawRect (CDrawContext* context, const CRect& dirtyRect) override;
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void setViewSize (const CRect& rect, bool invalid = true) override;
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bool sizeToFit () override;
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//------------------------------------------------------------------------
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protected:
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using NoteRectCache = std::array<CRect, MaxNotes>;
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void invalidNote (NoteIndex note);
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NoteIndex pointToNote (const CPoint& p, bool ignoreY) const;
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const NoteRectCache& getNoteRectCache () const { return noteRectCache; }
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private:
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void drawNote (CDrawContext* context, CRect& rect, NoteIndex note, bool isWhite) const;
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CRect calcNoteRect (NoteIndex note) const;
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void updateNoteRectCache () const;
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void createBitmapCache ();
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using BitmapArray =
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std::array<SharedPointer<CBitmap>, static_cast<size_t> (BitmapID::NumBitmaps)>;
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BitmapArray bitmaps;
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SharedPointer<CBitmap> whiteKeyBitmapCache;
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SharedPointer<CBitmap> blackKeyBitmapCache;
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SharedPointer<CFontDesc> noteNameFont;
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CRect whiteKeyBitmapInset;
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CRect blackKeyBitmapInset;
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CCoord whiteKeyWidth {30};
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CCoord blackKeyWidth {20};
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CCoord blackKeyHeight {20};
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CCoord lineWidth {1.};
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CColor frameColor {kBlackCColor};
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CColor fontColor {kBlackCColor};
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CColor whiteKeyColor {kWhiteCColor};
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CColor whiteKeyPressedColor {kGreyCColor};
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CColor blackKeyColor {kBlackCColor};
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CColor blackKeyPressedColor {kGreyCColor};
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NumNotes numKeys {88};
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NoteIndex startNote {21};
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bool drawNoteText {false};
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mutable bool noteRectCacheInvalid {true};
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mutable NoteRectCache noteRectCache;
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std::bitset<MaxNotes> keyPressed {};
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};
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class KeyboardViewRangeSelector;
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//------------------------------------------------------------------------
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struct IKeyboardViewKeyRangeChangedListener
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{
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virtual void onKeyRangeChanged (KeyboardViewRangeSelector*) = 0;
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virtual ~IKeyboardViewKeyRangeChangedListener () noexcept = default;
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};
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//------------------------------------------------------------------------
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class KeyboardViewRangeSelector : public KeyboardViewBase
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{
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public:
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struct Range
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{
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NoteIndex position;
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NumNotes length;
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Range (NoteIndex position = 0, NumNotes length = 0) : position (position), length (length)
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{
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}
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bool operator!= (const Range& r) const
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{
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return position != r.position || length != r.length;
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}
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};
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KeyboardViewRangeSelector () = default;
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void drawRect (CDrawContext* context, const CRect& dirtyRect) override;
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void setKeyRange (NoteIndex startNote, NumNotes numKeys) override;
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void setSelectionRange (const Range& range);
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void setSelectionMinMax (NumNotes minRange, NumNotes maxRange);
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const Range& getSelectionRange () const { return selectionRange; }
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NumNotes getSelectionMin () const { return rangeMin; }
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NumNotes getSelectionMax () const { return rangeMax; }
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NumNotes getNumWhiteKeysSelected () const;
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void registerKeyRangeChangedListener (IKeyboardViewKeyRangeChangedListener* listener);
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void unregisterKeyRangeChangedListener (IKeyboardViewKeyRangeChangedListener* listener);
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//------------------------------------------------------------------------
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private:
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DispatchList<IKeyboardViewKeyRangeChangedListener*> listeners;
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Range selectionRange {0, 12};
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NumNotes rangeMin {12};
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NumNotes rangeMax {24};
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#if VSTGUI_TOUCH_EVENT_HANDLING
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void onTouchEvent (ITouchEvent& event) override;
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bool wantsMultiTouchEvents () const override;
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void onTouchBegin (const ITouchEvent::TouchPair& touch, ITouchEvent& event);
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void onTouchMove (const ITouchEvent::TouchPair& touch, ITouchEvent& event);
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enum TouchMode {kUnknown, kMoveRange, kChangeRangeFront, kChangeRangeBack};
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Range selectionRangeOnTouchStart;
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int32_t touchIds[2] {-1};
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TouchMode touchMode {kUnknown};
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NoteIndex touchStartNote[2];
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#else
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CMouseEventResult onMouseDown (CPoint& where, const CButtonState& buttons) override;
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CMouseEventResult onMouseMoved (CPoint& where, const CButtonState& buttons) override;
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CMouseEventResult onMouseUp (CPoint& where, const CButtonState& buttons) override;
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CMouseEventResult onMouseCancel () override;
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Range moveStartRange;
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NoteIndex moveStartNote {-1};
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#endif
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};
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//------------------------------------------------------------------------
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struct IKeyboardViewPlayerDelegate
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{
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using NoteIndex = KeyboardViewBase::NoteIndex;
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virtual int32_t onNoteOn (NoteIndex note, double xPos, double yPos) = 0;
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virtual void onNoteOff (NoteIndex note, int32_t noteID) = 0;
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virtual void onNoteModulation (int32_t noteID, double xPos, double yPos) = 0;
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virtual ~IKeyboardViewPlayerDelegate () noexcept = default;
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};
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//------------------------------------------------------------------------
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struct KeyboardViewPlayerDelegate : public IKeyboardViewPlayerDelegate
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{
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int32_t onNoteOn (NoteIndex note, double xPos, double yPos) override { return -1; }
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void onNoteOff (NoteIndex note, int32_t noteID) override {}
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void onNoteModulation (int32_t noteID, double xPos, double yPos) override {}
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};
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//------------------------------------------------------------------------
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class KeyboardView : public KeyboardViewBase
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{
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public:
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KeyboardView ();
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void setDelegate (IKeyboardViewPlayerDelegate* inDelegate) { delegate = inDelegate; }
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private:
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double calcYParameter (NoteIndex note, CCoord y) const;
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double calcXParameter (NoteIndex note, CCoord x) const;
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#if VSTGUI_TOUCH_EVENT_HANDLING
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bool wantsMultiTouchEvents () const override { return true; }
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void onTouchEvent (ITouchEvent& event) override;
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void onTouchBegin (const ITouchEvent::TouchPair& touch, ITouchEvent& event);
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void onTouchMove (const ITouchEvent::TouchPair& touch, ITouchEvent& event);
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void onTouchEnd (const ITouchEvent::TouchPair& touch, ITouchEvent& event);
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struct NoteTouch
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{
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NoteIndex note;
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int32_t noteID;
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NoteTouch (NoteIndex note) : note (note), noteID (-1) {}
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};
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std::map<int32_t, NoteTouch> noteTouches;
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#else
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void doNoteOff ();
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void doNoteOn (NoteIndex note, double yPos, double xPos);
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CMouseEventResult onMouseDown (CPoint& where, const CButtonState& buttons) override;
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CMouseEventResult onMouseMoved (CPoint& where, const CButtonState& buttons) override;
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CMouseEventResult onMouseUp (CPoint& where, const CButtonState& buttons) override;
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CMouseEventResult onMouseCancel () override;
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NoteIndex pressedNote {-1};
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int32_t noteID {-1};
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#endif
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IKeyboardViewPlayerDelegate* delegate {nullptr};
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};
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//------------------------------------------------------------------------
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} // VSTGUI
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