//*CMZ : 2.00/00 18/02/98 18.49.46 by Fons Rademakers
//*-- Author : Fons Rademakers 13/01/98
//*KEEP,CopyRight,T=C.
/*************************************************************************
* Copyright(c) 1995-1999, The ROOT System, All rights reserved. *
* Authors: Rene Brun, Fons Rademakers. *
* For list of contributors see $ROOTSYS/AA_CREDITS. *
* *
* Permission to use, copy, modify and distribute this software and its *
* documentation for non-commercial purposes is hereby granted without *
* fee, provided that the above copyright notice appears in all copies *
* and that both the copyright notice and this permission notice appear *
* in the supporting documentation. The authors make no claims about the *
* suitability of this software for any purpose. It is provided "as is" *
* without express or implied warranty. *
*************************************************************************/
//*KEEP,CopyLeft.
/**************************************************************************
This source is based on Xclass95, a Win95-looking GUI toolkit.
Copyright (C) 1996, 1997 David Barth, Ricky Ralston, Hector Peraza.
Xclass95 is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
**************************************************************************/
//*KEND.
//////////////////////////////////////////////////////////////////////////
// //
// TGComboBox, TGComboBoxPopup //
// //
// A combobox (also known as a drop down listbox) allows the selection //
// of one item out of a list of items. The selected item is visible in //
// a little window. To view the list of possible items one has to click //
// on a button on the right of the little window. This will drop down //
// a listbox. After selecting an item from the listbox the box will //
// disappear and the newly selected item will be shown in the little //
// window. //
// //
// The TGComboBox is user callable. The TGComboBoxPopup is a service //
// class of the combobox. //
// //
// Selecting an item in the combobox will generate the event: //
// kC_COMMAND, kCM_COMBOBOX, combobox id, item id. //
// //
//////////////////////////////////////////////////////////////////////////
//*KEEP,TGComboBox.
#include "TGComboBox.h"
//*KEEP,TGScrollBar.
#include "TGScrollBar.h"
//*KEEP,TGPicture.
#include "TGPicture.h"
//*KEND.
ClassImp(TGComboBoxPopup)
ClassImp(TGComboBox)
//______________________________________________________________________________
TGComboBoxPopup::TGComboBoxPopup(const TGWindow *p, UInt_t w, UInt_t h,
UInt_t options, ULong_t back) :
TGCompositeFrame (p, w, h, options, back)
{
// Create a combo box popup frame.
SetWindowAttributes_t wattr;
wattr.fMask = kWAOverrideRedirect | kWASaveUnder |
kWABorderPixel | kWABorderWidth;
wattr.fOverrideRedirect = kTRUE;
wattr.fSaveUnder = kTRUE;
wattr.fBorderPixel = fgBlackPixel;
wattr.fBorderWidth = 1;
gGXW->ChangeWindowAttributes(fId, &wattr);
gGXW->SelectInput(fId, kStructureNotifyMask);
}
//______________________________________________________________________________
Bool_t TGComboBoxPopup::HandleButton(Event_t *event)
{
// Handle mouse button event in combo box popup.
if (event->fType == kButtonRelease) EndPopup();
return kTRUE;
}
//______________________________________________________________________________
void TGComboBoxPopup::EndPopup()
{
// Ungrab pointer and unmap popup window.
gGXW->GrabPointer(0, 0, 0, 0, kFALSE);
UnmapWindow();
}
//______________________________________________________________________________
void TGComboBoxPopup::PlacePopup(Int_t x, Int_t y, UInt_t w, UInt_t h)
{
// Popup combo box popup window at the specified place.
Int_t rx, ry;
UInt_t rw, rh;
// Parent is root window for the popup:
gGXW->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();
gGXW->GrabPointer(fId, kButtonPressMask | kButtonReleaseMask |
kPointerMotionMask, kNone, fgDefaultCursor);
fClient->WaitForUnmap(this);
EndPopup();
}
//______________________________________________________________________________
TGComboBox::TGComboBox(const TGWindow *p, Int_t id, UInt_t options,
ULong_t back) :
TGCompositeFrame (p, 10, 10, options, back)
{
// Create a combo box widget.
fComboBoxId = id;
fMsgWindow = p;
fBpic = fClient->GetPicture("arrow_down.xpm");
if (!fBpic)
Error("TGComboBox", "arrow_down.xpm not found");
fSelEntry = new TGTextLBEntry(this, new TGString(""), 0);
fDDButton = new TGScrollBarElement(this, fBpic, kDefaultScrollBarWidth,
kDefaultScrollBarWidth, kRaisedFrame);
AddFrame(fSelEntry, fLhs = new TGLayoutHints(kLHintsLeft |
kLHintsExpandY | kLHintsExpandX));
//0, 0, 1, 0));
AddFrame(fDDButton, fLhb = new TGLayoutHints(kLHintsRight |
kLHintsExpandY));
fComboFrame = new TGComboBoxPopup(fClient->GetRoot(), 100, 100, kVerticalFrame);
fListBox = new TGListBox(fComboFrame, fComboBoxId, kChildFrame);
fListBox->Resize(100, 100);
fListBox->Associate(this);
fComboFrame->AddFrame(fListBox, fLhdd = new TGLayoutHints(kLHintsExpandX |
kLHintsExpandY));
fComboFrame->MapSubwindows();
fComboFrame->Resize(fComboFrame->GetDefaultSize());
gGXW->GrabButton(fId, kButton1, kAnyModifier, kButtonPressMask |
kButtonReleaseMask, kNone, kNone);
// Drop down listbox of combo box should react to pointer motion
// so it will be able to Activate() (i.e. highlight) the different
// items when the mouse crosses.
gGXW->SelectInput(fListBox->GetContainer()->GetId(), kButtonPressMask |
kButtonReleaseMask | kPointerMotionMask);
}
//______________________________________________________________________________
TGComboBox::~TGComboBox()
{
// Delete a combo box widget.
delete fDDButton;
delete fSelEntry;
delete fListBox;
delete fComboFrame;
delete fLhs;
delete fLhb;
delete fLhdd;
}
//______________________________________________________________________________
void TGComboBox::DrawBorder()
{
// Draw border of combo box widget.
switch (fOptions & (kSunkenFrame | kRaisedFrame | kDoubleBorder)) {
case kSunkenFrame | kDoubleBorder:
gGXW->DrawLine(fId, fgShadowGC, 0, 0, fWidth-2, 0);
gGXW->DrawLine(fId, fgShadowGC, 0, 0, 0, fHeight-2);
gGXW->DrawLine(fId, fgBlackGC, 1, 1, fWidth-3, 1);
gGXW->DrawLine(fId, fgBlackGC, 1, 1, 1, fHeight-3);
gGXW->DrawLine(fId, fgHilightGC, 0, fHeight-1, fWidth-1, fHeight-1);
gGXW->DrawLine(fId, fgHilightGC, fWidth-1, fHeight-1, fWidth-1, 0);
gGXW->DrawLine(fId, fgBckgndGC, 1, fHeight-2, fWidth-2, fHeight-2);
gGXW->DrawLine(fId, fgBckgndGC, fWidth-2, 1, fWidth-2, fHeight-2);
break;
default:
TGCompositeFrame::DrawBorder();
break;
}
}
//______________________________________________________________________________
void TGComboBox::SetTopEntry(TGLBEntry *e, TGLayoutHints *lh)
{
// Set a new combo box value (normally update of text string in
// fSelEntry is done via fSelEntry::Update()).
RemoveFrame(fSelEntry);
fSelEntry->DestroyWindow();
delete fSelEntry;
delete fLhs;
fSelEntry = e;
fLhs = lh;
AddFrame(fSelEntry, fLhs);
Layout();
}
//______________________________________________________________________________
void TGComboBox::Select(Int_t id)
{
// Make the selected item visible in the combo box window.
TGLBEntry *e;
e = fListBox->Select(id);
if (e) {
fSelEntry->Update(e);
Layout();
}
}
//______________________________________________________________________________
Bool_t TGComboBox::HandleButton(Event_t *event)
{
// Handle mouse button events in the combo box.
if (event->fType == kButtonPress) {
if ((Window_t)event->fUser[0] == fDDButton->GetId()) // fUser[0] = child window
fDDButton->SetState(kButtonDown);
} else {
int ax, ay;
Window_t wdummy;
fDDButton->SetState(kButtonUp);
gGXW->TranslateCoordinates(fId, (fComboFrame->GetParent())->GetId(),
0, fHeight, ax, ay, wdummy);
fComboFrame->PlacePopup(ax, ay, fWidth-2, fComboFrame->GetDefaultHeight());
}
return kTRUE;
}
//______________________________________________________________________________
Bool_t TGComboBox::ProcessMessage(Long_t msg, Long_t, Long_t parm2)
{
// Process messages generated by the listbox and forward
// messages to the combobox message handling window. Parm2 contains
// the id of the selected listbox entry.
TGLBEntry *e;
switch (GET_MSG(msg)) {
case kC_COMMAND:
switch (GET_SUBMSG(msg)) {
case kCM_LISTBOX:
e = fListBox->GetSelectedEntry();
fSelEntry->Update(e);
Layout();
fComboFrame->EndPopup();
SendMessage(fMsgWindow, MK_MSG(kC_COMMAND, kCM_COMBOBOX),
fComboBoxId, parm2);
break;
}
break;
default:
break;
}
return kTRUE;
}
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