FWTextTreeCellRenderer.h

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#ifndef Fireworks_TableWidget_FWTextTreeCellRenderer_h
#define Fireworks_TableWidget_FWTextTreeCellRenderer_h

#include <cassert>
#include <iostream>

#include "Fireworks/TableWidget/interface/FWTextTableCellRenderer.h"
#include "Fireworks/TableWidget/interface/GlobalContexts.h"
#include "Fireworks/TableWidget/interface/FWTabularWidget.h"

#include "TGTextEntry.h"
#include "TGPicture.h"
#include "TSystem.h"
#include "TGClient.h"
#include "TVirtualX.h"

class FWTextTreeCellRenderer : public FWTextTableCellRenderer {
protected:
  const static int s_iconOffset = 2;

public:
  FWTextTreeCellRenderer(const TGGC* iContext = &(getDefaultGC()),
                         const TGGC* iHighlightContext = &(getDefaultHighlightGC()),
                         Justify iJustify = kJustifyLeft)
      : FWTextTableCellRenderer(iContext, iHighlightContext, iJustify),
        m_indentation(0),
        m_editor(nullptr),
        m_showEditor(false),
        m_isParent(false),
        m_isOpen(false),
        m_blackIcon(true) {}

  // Where to find the icons
  static const TString& coreIcondir() {
    static TString path = Form("%s/src/Fireworks/Core/icons/", gSystem->Getenv("CMSSW_BASE"));
    if (gSystem->AccessPathName(path.Data())) {  // cannot find directory
      assert(gSystem->Getenv("CMSSW_RELEASE_BASE"));
      path = Form("%s/src/Fireworks/Core/icons/", gSystem->Getenv("CMSSW_RELEASE_BASE"));
    }

    return path;
  }

  static const TGPicture* closedImage(bool isBlack = true) {
    static const TGPicture* s_picture_white = gClient->GetPicture(coreIcondir() + "arrow-white-right-blackbg.png");
    static const TGPicture* s_picture_black = gClient->GetPicture(coreIcondir() + "arrow-black-right.png");

    return isBlack ? s_picture_black : s_picture_white;
  }

  static const TGPicture* openedImage(bool isBlack = true) {
    static const TGPicture* s_picture_white = gClient->GetPicture(coreIcondir() + "arrow-white-down-blackbg.png");
    static const TGPicture* s_picture_black = gClient->GetPicture(coreIcondir() + "arrow-black-down.png");

    return isBlack ? s_picture_black : s_picture_white;
  }

  static int iconWidth() { return openedImage(true)->GetWidth() + s_iconOffset; }

  virtual void setIndentation(int indentation = 0) { m_indentation = indentation; }
  virtual void setCellEditor(TGTextEntry* editor) { m_editor = editor; }
  virtual void showEditor(bool value) { m_showEditor = value; }

  void setIsParent(bool value) { m_isParent = value; }
  void setIsOpen(bool value) { m_isOpen = value; }
  void setBlackIcon(bool value) { m_blackIcon = value; }

  UInt_t width() const override {
    int w = FWTextTableCellRenderer::width() + 15 + m_indentation;
    if (m_isParent)
      w += iconWidth();
    return w;
  }

  void draw(Drawable_t iID, int iX, int iY, unsigned int iWidth, unsigned int iHeight) override {
    if (m_showEditor && m_editor) {
      //  printf("renderer draw editor %d %d %d %d \n", iX, iY, m_editor->GetWidth(), m_editor->GetHeight());

      // fill to cover buffer offset
      static TGGC editGC(FWTextTableCellRenderer::getDefaultGC());
      editGC.SetForeground(m_editor->GetBackground());
      gVirtualX->FillRectangle(iID,
                               editGC(),
                               iX - FWTabularWidget::kTextBuffer,
                               iY - FWTabularWidget::kTextBuffer,
                               iWidth + 2 * FWTabularWidget::kTextBuffer,
                               iHeight + 2 * FWTabularWidget::kTextBuffer);

      if (iY > -2) {
        // redraw editor
        if (!m_editor->IsMapped()) {
          m_editor->MapWindow();
          m_editor->SetFocus();
        }
        m_editor->MoveResize(iX, iY, m_editor->GetWidth(), m_editor->GetHeight());
        m_editor->SetCursorPosition(data().size());
        gClient->NeedRedraw(m_editor);

        return;
      } else {
        // hide editor if selected entry scrolled away
        if (m_editor->IsMapped())
          m_editor->UnmapWindow();
      }
    }

    if (selected()) {
      GContext_t c = highlightContext()->GetGC();
      gVirtualX->FillRectangle(iID,
                               c,
                               iX - FWTabularWidget::kTextBuffer,
                               iY - FWTabularWidget::kTextBuffer,
                               iWidth + 2 * FWTabularWidget::kTextBuffer,
                               iHeight + 2 * FWTabularWidget::kTextBuffer);
    }
    int xOffset = 0;
    if (m_isParent) {
      const TGPicture* img = m_isOpen ? openedImage(m_blackIcon) : closedImage(m_blackIcon);
      img->Draw(iID, graphicsContext()->GetGC(), m_indentation + iX, iY + 2);
      xOffset += img->GetWidth() + s_iconOffset;
    }

    FontMetrics_t metrics;
    font()->GetFontMetrics(&metrics);

    gVirtualX->DrawString(iID,
                          graphicsContext()->GetGC(),
                          iX + m_indentation + xOffset,
                          iY + metrics.fAscent,
                          data().c_str(),
                          data().size());
  }

private:
  int m_indentation;
  TGTextEntry* m_editor;
  bool m_showEditor;
  bool m_isParent;
  bool m_isOpen;
  bool m_blackIcon;
};

#endif