From 1c6513e0a45b6929bab27a5fa04b1b32e50c0292 Mon Sep 17 00:00:00 2001
From: Vitaly Sverchinsky <sverchinsky@gmail.com>
Date: Thu, 15 Jul 2021 14:15:31 +0300
Subject: [PATCH] Few new track art routines

---
 src/AllThemeResources.h |  4 +++
 src/TrackArtist.cpp     | 57 +++++++++++++++++++++++++++++++++++++++++
 src/TrackArtist.h       |  8 ++++++
 src/ViewInfo.h          |  1 +
 4 files changed, 70 insertions(+)

diff --git a/src/AllThemeResources.h b/src/AllThemeResources.h
index e62b72dec..28d7abb16 100644
--- a/src/AllThemeResources.h
+++ b/src/AllThemeResources.h
@@ -371,3 +371,7 @@ from there.  Audacity will look for a file called "Pause.png".
    DEFINE_COLOUR( clrSpectro4Sel,         wxColour(  191,    0,    0),  wxT("Spectro4Sel") );
    DEFINE_COLOUR( clrSpectro5Sel,         wxColour(  191,  191,  191),  wxT("Spectro5Sel") );
 
+   DEFINE_COLOUR( clrClipAffordanceOutlinePen,    wxColour(    0,    0,    0),  wxT("ClipAffordanceOutlinePen") );
+   DEFINE_COLOUR( clrClipAffordanceInactiveBrush, wxColour(  202,  202,  202),  wxT("ClipAffordanceUnselectedBrush") );
+   DEFINE_COLOUR( clrClipAffordanceActiveBrush,   wxColour(  219,  219,  219),  wxT("ClipAffordanceSelectedBrush") );
+   DEFINE_COLOUR( clrClipAffordanceStroke,        wxColour(  255,  255,  255),  wxT("ClipAffordanceStroke") );
diff --git a/src/TrackArtist.cpp b/src/TrackArtist.cpp
index 14f7699b0..3248c3140 100644
--- a/src/TrackArtist.cpp
+++ b/src/TrackArtist.cpp
@@ -56,6 +56,9 @@ audio tracks.
 
 #include <wx/dc.h>
 
+//Thickness of the clip frame outline, shown when clip is dragged
+static constexpr int ClipSelectionStrokeSize{ 1 };//px
+
 TrackArtist::TrackArtist( TrackPanel *parent_ )
    : parent( parent_ )
 {
@@ -260,6 +263,60 @@ void TrackArtist::UpdatePrefs()
    SetColours(0);
 }
 
+void TrackArt::DrawClipAffordance(wxDC& dc, const wxRect& rect, bool highlight, bool selected)
+{
+   if (selected)
+   {
+      wxRect strokeRect{
+         rect.x - ClipSelectionStrokeSize,
+         rect.y,
+         rect.width + ClipSelectionStrokeSize * 2,
+         rect.height + ClipFrameRadius };
+      dc.SetBrush(*wxTRANSPARENT_BRUSH);
+      AColor::UseThemeColour(&dc, clrClipAffordanceStroke, clrClipAffordanceStroke);
+      dc.DrawRoundedRectangle(strokeRect, ClipFrameRadius);
+   }
+   AColor::UseThemeColour(&dc, highlight ? clrClipAffordanceActiveBrush : clrClipAffordanceInactiveBrush, clrClipAffordanceOutlinePen);
+   dc.DrawRoundedRectangle(wxRect(rect.x, rect.y + ClipSelectionStrokeSize, rect.width, rect.height + ClipFrameRadius), ClipFrameRadius);
+}
+
+void TrackArt::DrawClipEdges(wxDC& dc, const wxRect& clipRect, bool selected)
+{
+   dc.SetBrush(*wxTRANSPARENT_BRUSH);
+   {
+      AColor::UseThemeColour(&dc, -1, clrClipAffordanceOutlinePen);
+      AColor::Line(dc,
+         clipRect.GetLeft(), clipRect.GetTop(),
+         clipRect.GetLeft(), clipRect.GetBottom());
+      AColor::Line(dc,
+         clipRect.GetRight(), clipRect.GetTop(),
+         clipRect.GetRight(), clipRect.GetBottom());
+   }
+   if(selected)
+   {
+      if constexpr (ClipSelectionStrokeSize == 1)
+      {
+         AColor::UseThemeColour(&dc, -1, clrClipAffordanceStroke);
+         AColor::Line(dc,
+            clipRect.GetLeft() - ClipSelectionStrokeSize, clipRect.GetTop(),
+            clipRect.GetLeft() - ClipSelectionStrokeSize, clipRect.GetBottom());
+         AColor::Line(dc,
+            clipRect.GetRight() + ClipSelectionStrokeSize, clipRect.GetTop(),
+            clipRect.GetRight() + ClipSelectionStrokeSize, clipRect.GetBottom());
+      }
+      else if constexpr (ClipSelectionStrokeSize > 1)
+      {
+         AColor::UseThemeColour(&dc, clrClipAffordanceStroke, clrClipAffordanceStroke);
+         dc.DrawRectangle(wxRect(
+            clipRect.GetLeft() - ClipSelectionStrokeSize, clipRect.GetTop(),
+            ClipSelectionStrokeSize, clipRect.GetHeight()));
+         dc.DrawRectangle(wxRect(
+            clipRect.GetRight() + 1, clipRect.GetTop(),
+            ClipSelectionStrokeSize, clipRect.GetHeight()));
+      }
+   }
+}
+
 // Draws the sync-lock bitmap, tiled; always draws stationary relative to the DC
 //
 // AWD: now that the tiles don't link together, we're drawing a tilted grid, at
diff --git a/src/TrackArtist.h b/src/TrackArtist.h
index 99790c7a0..df1c59918 100644
--- a/src/TrackArtist.h
+++ b/src/TrackArtist.h
@@ -38,6 +38,14 @@ class ZoomInfo;
 
 namespace TrackArt {
 
+   static constexpr int ClipFrameRadius{ 6 };
+
+   AUDACITY_DLL_API
+   void DrawClipAffordance(wxDC& dc, const wxRect& affordanceRect, bool highlight = false, bool selected = false);
+
+   AUDACITY_DLL_API
+   void DrawClipEdges(wxDC& dc, const wxRect& clipRect, bool selected = false);
+
    // Helper: draws the "sync-locked" watermark tiled to a rectangle
    AUDACITY_DLL_API
    void DrawSyncLockTiles(
diff --git a/src/ViewInfo.h b/src/ViewInfo.h
index 10f2a2d46..62264246e 100644
--- a/src/ViewInfo.h
+++ b/src/ViewInfo.h
@@ -101,6 +101,7 @@ private:
 // See big pictorial comment in TrackPanel.cpp for explanation of these numbers
 enum : int {
    // constants related to y coordinates in the track panel
+   kAffordancesAreaHeight = 20,
    kTopInset = 4,
    kTopMargin = kTopInset + kBorderThickness,
    kBottomMargin = kShadowThickness + kBorderThickness,