FWColorSelect.cc

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/*
    All access to this colour picker goes through FWColorSelect.
    Widget creation: new FWColorSelect(p, n, col, cols, id)
                        p: parent window
                        n: the name of the popup
                      col: initially selected colour (in Pixel_t)
                     cols: a vector<Pixel_t> of colour values
                       id: window ID

    After creation, connect to signal method ColorSelected(Pixel_t) in
    FWColorSelect to receive colour changes.
 */
#include <boost/bind.hpp>

#include "TGLayout.h"
#include "TGClient.h"
#include "TGGC.h"
#include "TGColorDialog.h"
#include "TColor.h"

#include "Fireworks/Core/src/FWColorSelect.h"
#include "Fireworks/Core/interface/FWColorManager.h"

//------------------------------Constants------------------------------//

enum FWCSelConstants
{
   kCFWidth  = 15, kCFPadLeft =  4, kCFPadAbove = 8,
   kCFHeight = 15, kCFPadRight = 4, kCFPadBelow = 8,

   kHLOffsetX = 3,  kHLExtraWidth  = 5,
   kHLOffsetY = 3,  kHLExtraHeight = 5,

   kCROffsetX = 5,   kCRPadAbove = 3,
   kCROffsetY = 5,   kCRPadBelow = 6,

   kColorPopupGray = 0xcccccc
};


//------------------------------FWColorFrame------------------------------//

FWColorFrame::FWColorFrame(const TGWindow *p, Color_t ci) :
   TGFrame(p, 20, 20, kOwnBackground)
{
   SetColor(ci);
   Resize(kCFWidth, kCFHeight);
}

Bool_t FWColorFrame::HandleButton(Event_t *event)
{
   if (event->fType == kButtonRelease)
   {
      ColorSelected(fColor);
   }
   return kTRUE;
}

void
FWColorFrame::SetColor(Color_t ci)
{
   fColor = ci;
   SetBackgroundColor(TColor::Number2Pixel(fColor));
}

void FWColorFrame::ColorSelected(Color_t ci)
{
   Emit("ColorSelected(Color_t)", ci);
}


//------------------------------FWColorRow------------------------------//

FWColorRow::FWColorRow(const TGWindow *p) :
   TGHorizontalFrame(p, 10, 10, kOwnBackground, TGFrame::GetBlackPixel()),
   fBackgroundIsBlack(kTRUE)
{
   fSelectedIndex = -1;
}

FWColorRow::~FWColorRow()
{
   Cleanup();
}

void FWColorRow::SetBackgroundToBlack(Bool_t toBlack)
{
   fBackgroundIsBlack= toBlack;
   if (fBackgroundIsBlack) {
      SetBackgroundColor(TGFrame::GetBlackPixel());
   } else {
      SetBackgroundColor(TGFrame::GetWhitePixel());
   }
}

void FWColorRow::DoRedraw()
{
   TGCompositeFrame::DoRedraw();
   DrawHighlight();
}

void FWColorRow::DrawHighlight()
{
   if (fSelectedIndex >= 0)
   {
      Int_t x = fSelectedIndex * (fCc.at(fSelectedIndex)->GetWidth() + kCFPadLeft + kCFPadRight) + kCFPadLeft;
      Int_t y = kCFPadBelow;
      Int_t w = fCc.at(fSelectedIndex)->GetWidth();
      Int_t h = fCc.at(fSelectedIndex)->GetHeight();
      gVirtualX->DrawRectangle(fId, GetShadowGC()(), x - kHLOffsetX, y - kHLOffsetY, w + kHLExtraWidth, h + kHLExtraHeight);
   }
}

void FWColorRow::AddColor(Color_t color)
{
   fCc.push_back(new FWColorFrame(this, color));
   AddFrame(fCc.back(), new TGLayoutHints(kLHintsCenterX | kLHintsCenterY, kCFPadLeft, kCFPadRight, kCFPadAbove, kCFPadBelow));
   fCc.back()->Connect("ColorSelected(Color_t)", "FWColorRow", this, "ColorChanged(Color_t)");
}

void FWColorRow::ResetColor(Int_t iIndex, Color_t iColor)
{
   fCc[iIndex]->SetColor(iColor);
}

Int_t 
FWColorRow::FindColorIndex(Color_t iColor) const
{
   Int_t returnValue = -1;
   Int_t index       =  0;
   for(std::vector<FWColorFrame*>::const_iterator it = fCc.begin(), itEnd = fCc.end();
       it != itEnd; ++it, ++index)
   {
      if ((*it)->GetColor() == iColor)
         return index;
   }
   return returnValue;
}

void FWColorRow::ColorChanged(Color_t ci)
{
   Emit("ColorChanged(Color_t)", ci);
}


//------------------------------FWColorPopup------------------------------//

Bool_t FWColorPopup::fgFreePalette = kFALSE;

Bool_t FWColorPopup::HasFreePalette()     { return fgFreePalette;  }
void   FWColorPopup::EnableFreePalette()  { fgFreePalette = kTRUE; }

FWColorPopup::FWColorPopup(const TGWindow *p, Color_t color) :
   TGVerticalFrame(p, 10, 10, kDoubleBorder | kRaisedFrame | kOwnBackground, kColorPopupGray),
   fShowWheel(kFALSE)
{
   SetWindowAttributes_t wattr;
   wattr.fMask = kWAOverrideRedirect;
   wattr.fOverrideRedirect = kTRUE;
   gVirtualX->ChangeWindowAttributes(fId, &wattr);
   AddInput(kStructureNotifyMask); // to notify the client for structure (i.e. unmap) changes

   fSelectedColor = color;
   fLabel = nullptr;
   fNumColors = 0;

   fFirstRow  = new FWColorRow(this);
   fSecondRow = new FWColorRow(this);
   fFirstRow ->Connect("ColorChanged(Color_t)", "FWColorPopup", this, "ColorSelected(Color_t)");
   fSecondRow->Connect("ColorChanged(Color_t)", "FWColorPopup", this, "ColorSelected(Color_t)");
}

FWColorPopup::~FWColorPopup()
{
   Cleanup();
}

Bool_t FWColorPopup::HandleButton(Event_t *event)
{
   if (event->fX < 0 || event->fX >= (Int_t) fWidth ||
       event->fY < 0 || event->fY >= (Int_t) fHeight)
   {
      if (event->fType == kButtonRelease)
         UnmapWindow();
   }
   else
   {
      TGFrame *f = GetFrameFromPoint(event->fX, event->fY);
      if (f && f != this)
      {
         TranslateCoordinates(f, event->fX, event->fY, event->fX, event->fY);
         f->HandleButton(event);
      }
   }
   return kTRUE;
}

void FWColorPopup::InitContent(const char *name, const std::vector<Color_t>& colors, bool backgroundIsBlack)
{
   fLabel = new TGLabel(this, name);
   fLabel->SetBackgroundColor(GetBackground());
   SetColors(colors, backgroundIsBlack);

   AddFrame(fLabel, new TGLayoutHints(kLHintsCenterX | kLHintsCenterY, kCROffsetX, kCROffsetY, kCRPadAbove + 1, kCRPadBelow - 1));
   AddFrame(fFirstRow, new TGLayoutHints(kLHintsCenterX | kLHintsCenterY, kCROffsetX, kCROffsetY, kCRPadAbove, kCRPadBelow));
   AddFrame(fSecondRow, new TGLayoutHints(kLHintsCenterX | kLHintsCenterY, kCROffsetX, kCROffsetY, kCRPadAbove, kCRPadBelow));

   fFirstRow->MapSubwindows();
   fFirstRow->Resize(fFirstRow->GetDefaultSize());

   fSecondRow->MapSubwindows();
   fSecondRow->Resize(fSecondRow->GetDefaultSize());

   if (fgFreePalette)
   {
      TGTextButton *b = new TGTextButton(this, "Color wheel");
      AddFrame(b, new TGLayoutHints(kLHintsTop | kLHintsCenterX | kLHintsExpandX, kCROffsetX, kCROffsetY, kCRPadAbove, 2 * kCRPadBelow));
      b->Connect("Clicked()", "FWColorPopup", this, "PopupColorWheel()");
   }
}

// ----

void FWColorPopup::PopupColorWheel()
{
   fShowWheel = kTRUE;
   UnmapWindow();
}

void FWColorPopup::ColorWheelSelected(Pixel_t pix)
{
   ColorSelected(TColor::GetColor(pix));
}

// ----

void FWColorPopup::SetColors(const std::vector<Color_t>& colors, bool backgroundIsBlack)
{
   fNumColors = colors.size();
   for (UInt_t i = 0; i < colors.size() / 2; i++)
   {
      fFirstRow->AddColor(colors.at(i));
   }
   for (UInt_t i = colors.size() / 2; i < colors.size(); i++)
   {
      fSecondRow->AddColor(colors.at(i));
   }
   fFirstRow->SetBackgroundToBlack(backgroundIsBlack);
   fSecondRow->SetBackgroundToBlack(backgroundIsBlack);
}

void FWColorPopup::ResetColors(const std::vector<Color_t>& colors, bool backgroundIsBlack)
{
   fNumColors=colors.size();
   for (UInt_t i = 0; i < colors.size() / 2; i++)
   {
      fFirstRow->ResetColor(i,colors.at(i));
   }
   fFirstRow->SetBackgroundToBlack(backgroundIsBlack);
   UInt_t index = 0;
   for (UInt_t i = colors.size() / 2; i < colors.size(); i++, ++index)
   {
      fSecondRow->ResetColor(index,colors.at(i));
   }
   fSecondRow->SetBackgroundToBlack(backgroundIsBlack);
}

void FWColorPopup::PlacePopup(Int_t x, Int_t y, UInt_t w, UInt_t h)
{
   // Popup TGColorPopup at x,y position

   Int_t  rx, ry;
   UInt_t rw, rh;

   // Parent is root window for the popup:
   gVirtualX->GetWindowSize(fParent->GetId(), rx, ry, rw, rh);

   if (x < 0) x = 0;
   if (x + fWidth > rw) x = rw - fWidth;
   if (y < 0) y = 0;
   if (y + fHeight > rh) y = rh - fHeight;

   MoveResize(x, y, w, h);
   MapSubwindows();
   Layout();
   MapRaised();

   // find out if this is necessary
   gVirtualX->GrabPointer(fId, kButtonPressMask | kButtonReleaseMask | kPointerMotionMask, kNone, kNone);

   gClient->WaitForUnmap(this);
   gVirtualX->GrabPointer(0, 0, 0, 0, kFALSE);

   if (fShowWheel)
   {
      Int_t   retc;
      Pixel_t pixel = TColor::Number2Pixel(fSelectedColor);

      TGColorDialog *cd = new TGColorDialog(gClient->GetDefaultRoot(), this, &retc, &pixel, kFALSE);

      cd->Connect("ColorSelected(Pixel_t)", "FWColorPopup", this, "ColorWheelSelected(Pixel_t");

      cd->MapWindow();
      fClient->WaitForUnmap(cd);
      cd->DeleteWindow();

      fShowWheel = kFALSE;
   }
}

void FWColorPopup::SetName(const char* iName)
{
   fLabel->SetText(iName);
}

void FWColorPopup::SetSelection(Color_t iColor)
{
   fFirstRow ->SetSelectedIndex(fFirstRow->FindColorIndex(iColor));
   fSecondRow->SetSelectedIndex(fSecondRow->FindColorIndex(iColor));
}

void FWColorPopup::ColorSelected(Color_t ci)
{
   UnmapWindow();
   fSelectedColor = ci;
   Emit("ColorSelected(Color_t)", ci);
}


//------------------------------FWColorSelect------------------------------//

FWColorSelect::FWColorSelect(const TGWindow *p, const char* label, Color_t index, 
                             const FWColorManager* iManager, Int_t id) :
   TGColorSelect(p, TColor::Number2Pixel(index), id),
   fLabel(label),
   fSelectedColor(index),
   fFireworksPopup(nullptr),
   fColorManager(iManager)
{
   std::vector<Color_t> colors;
   fColorManager->fillLimitedColors(colors);

   fFireworksPopup = new FWColorPopup(gClient->GetDefaultRoot(), fColor);
   fFireworksPopup->InitContent(fLabel.c_str(), colors);
   fFireworksPopup->Connect("ColorSelected(Color_t)","FWColorSelect", this, "SetColorByIndex(Color_t)");

   fColorManager->colorsHaveChanged_.connect(boost::bind(&FWColorSelect::UpdateColors,this));
}

FWColorSelect::~FWColorSelect()
{
   delete fFireworksPopup;
}

Bool_t FWColorSelect::HandleButton(Event_t *event)
{
   TGFrame::HandleButton(event);
   if (!IsEnabled()) return kTRUE;

   if (event->fCode != kButton1) return kFALSE;

   if ((event->fType == kButtonPress) && HasFocus()) WantFocus();

   if (event->fType == kButtonPress)
   {
      fPressPos.fX = fX;
      fPressPos.fY = fY;

      if (fState != kButtonDown) {
         fPrevState = fState;
         SetState(kButtonDown);
      }
   }
   else
   {
      if (fState != kButtonUp)
      {
         SetState(kButtonUp);

         // case when it was dragged during guibuilding
         if ((fPressPos.fX != fX) || (fPressPos.fY != fY))
         {
            return kFALSE;
         }

         Window_t wdummy;
         Int_t ax, ay;

         std::vector<Color_t> colors;
         fColorManager->fillLimitedColors(colors);

         fFireworksPopup->ResetColors(colors, fColorManager->backgroundColorIndex()==FWColorManager::kBlackIndex);
         fFireworksPopup->SetSelection(fSelectedColor);

         gVirtualX->TranslateCoordinates(fId, gClient->GetDefaultRoot()->GetId(), 0, fHeight, ax, ay, wdummy);
         fFireworksPopup->PlacePopup(ax, ay, fFireworksPopup->GetDefaultWidth(), fFireworksPopup->GetDefaultHeight());
      }
   }
   return kTRUE;
}

void
FWColorSelect::SetColorByIndex(Color_t iColor)
{
   SetColorByIndex(iColor, kTRUE);
}

void 
FWColorSelect::SetColorByIndex(Color_t iColor, Bool_t iSendSignal)
{
   fSelectedColor = iColor;
   SetColor(TColor::Number2Pixel(iColor), kFALSE);
   if (iSendSignal)
   {
      ColorChosen(fSelectedColor);
   }
}

void FWColorSelect::UpdateColors()
{
   SetColor(fSelectedColor, kFALSE);
}

void 
FWColorSelect::ColorChosen(Color_t iColor)
{
   Emit("ColorChosen(Color_t)", iColor);
}