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bibletreeview.pas
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bibletreeview.pas
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unit BibleTreeView;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Controls, ComCtrls, Graphics, fgl, Projeto, LResources;
const
ImgIndexUnchecked = 0;
ImgIndexChecked = 1;
ImgIndexPartial = 2;
type
TOnVerseChangeEvent = procedure (index: integer) of object;
TIntegerList = specialize TFPGList<integer>;
{ TBibleTreeView }
TBibleTreeView = class(TTreeView)
private
FScope: TEscopoTexto;
FImages: TImageList;
FOnVerseChange: TOnVerseChangeEvent;
function GetVerseList: TStringList;
function GetVerseIndexes: TIntegerList;
procedure SetNodeStateIndex(node: TTreeNode; index: integer);
procedure SetScope(AValue: TEscopoTexto);
procedure ToggleTreeViewCheckBoxes(node: TTreeNode);
procedure TreeViewClick(Sender: TObject);
procedure CreateImageList;
public
constructor Create(AnOwner: TComponent); override;
destructor Destroy; override;
procedure SelectAll;
procedure SelectNone;
procedure SetVerseList(refs: TStringList);
property Scope: TEscopoTexto read FScope write SetScope;
property VerseList: TStringList read GetVerseList write SetVerseList;
property IndexesList: TIntegerList read GetVerseIndexes;
property OnVerseChange: TOnVerseChangeEvent read FOnVerseChange write FOnVerseChange;
end;
{$INCLUDE include/bookdefs.inc}
resourcestring
SChapterFmt = 'Chapter %d';
implementation
uses
LCLIntf;
{ TBibleTreeView }
procedure TBibleTreeView.SetNodeStateIndex(node: TTreeNode; index: integer);
var
child: TTreeNode;
begin
node.StateIndex := index;
child := node.GetFirstChild;
while assigned(child) do
begin
SetNodeStateIndex(child, index);
child := child.GetNextSibling;
end;
end;
function TBibleTreeView.GetVerseList: TStringList;
var
nb, nc, nv: TTreeNode;
begin
//DebugLn('====== Generating verse list');
result := TStringList.Create;
nb := Items[0];
while assigned(nb) do
begin
if nb.StateIndex <> ImgIndexUnchecked then
begin
nc := nb.GetFirstChild;
while assigned(nc) do
begin
if nc.StateIndex <> ImgIndexUnchecked then
begin
nv := nc.GetFirstChild;
while assigned(nv) do
begin
if nv.StateIndex = ImgIndexChecked then
begin
result.Add(Format('%d,%d,%d', [Integer(nb.Data), Integer(nc.Data), Integer(nv.Data)]));
//DebugLn('Adding verse %s', [result[result.Count-1]]);
end;
nv := nv.GetNextSibling;
end;
end;
nc := nc.GetNextSibling;
end;
end;
nb := nb.GetNextSibling;
end;
//DebugLn('====== Verse list generated');
end;
function TBibleTreeView.GetVerseIndexes: TIntegerList;
var
nb, nc, nv: TTreeNode;
begin
//DebugLn('====== Generating verse indexes list');
result := TIntegerList.Create;
nb := Items[0];
while assigned(nb) do
begin
if nb.StateIndex <> ImgIndexUnchecked then
begin
nc := nb.GetFirstChild;
while assigned(nc) do
begin
if nc.StateIndex <> ImgIndexUnchecked then
begin
nv := nc.GetFirstChild;
while assigned(nv) do
begin
if nv.StateIndex = ImgIndexChecked then
begin
result.Add(Integer(nv.Data));
//DebugLn('Adding verse %s', [result[result.Count-1]]);
end;
nv := nv.GetNextSibling;
end;
end;
nc := nc.GetNextSibling;
end;
end;
nb := nb.GetNextSibling;
end;
//DebugLn('====== Verse indexes list generated');
end;
procedure TBibleTreeView.SetScope(AValue: TEscopoTexto);
var
b, c, v: smallint;
nb, nc, nv: TTreeNode;
begin
if FScope = AValue then Exit;
FScope := AValue;
BeginUpdate;
Items.Clear;
for b:=0 to QLivros[FScope]-1 do
begin
nb := Items.Add(nil, NLivros[FScope][b]);
nb.StateIndex := 0;
nb.Data := Pointer(b + OffsetLivros[FScope] + 1);
for c:=0 to QCapitulos[FScope][b]-1 do
begin
nc := Items.AddChild(nb, Format(SChapterFmt, [c+1]));
nc.StateIndex := 0;
nc.Data := Pointer(c+1);
for v:=0 to QVersiculos[FScope][QCapLivros[FScope][b] + c - 1]-1 do
begin
nv := Items.AddChild(nc, IntToStr(v+1));
nv.StateIndex := 0;
nv.Data := Pointer(v+1);
end;
end;
end;
EndUpdate;
end;
procedure TBibleTreeView.SetVerseList(refs: TStringList);
var
ref: string;
b, c, v, i: integer;
nb, nc: TTreeNode;
begin
BeginUpdate;
Items.Clear;
nb := nil;
nc := nil;
i := 0;
for ref in refs do
begin
Sscanf(ref, '%d,%d,%d', [@b, @c, @v]);
if (nb = nil) or (nb.Data <> Pointer(b)) then
begin
nb := Items.Add(nil, NLivros[etONT][b-1]);
nb.Data := Pointer(b);
nc := nil;
end;
if (nc = nil) or (nc.Data <> Pointer(c)) then
begin
nc := Items.AddChild(nb, Format(SChapterFmt, [c]));
nc.Data := Pointer(c);
end;
Items.AddChild(nc, v.ToString).Data := Pointer(i);
Inc(i);
end;
SelectAll;
EndUpdate;
end;
procedure TBibleTreeView.ToggleTreeViewCheckBoxes(node: TTreeNode);
var
nparent: TTreeNode;
begin
if not assigned(node) then exit;
if node.StateIndex = ImgIndexUnchecked then
begin
SetNodeStateIndex(node, ImgIndexChecked);
nparent := node.Parent;
while assigned(nparent) do
begin
nparent.StateIndex := ImgIndexPartial;
nparent := nparent.Parent;
end;
end
else if node.StateIndex = ImgIndexChecked then
begin
SetNodeStateIndex(node, ImgIndexUnchecked);
nparent := node.Parent;
while assigned(nparent) do
begin
nparent.StateIndex := ImgIndexPartial;
nparent := nparent.Parent;
end;
end
else if node.StateIndex = ImgIndexPartial then
begin
SetNodeStateIndex(node, ImgIndexUnchecked);
end;
end;
procedure TBibleTreeView.TreeViewClick(Sender: TObject);
var
P: TPoint;
node: TTreeNode;
ht: THitTests;
begin
GetCursorPos(P);
P := ScreenToClient(P);
ht := GetHitTestInfoAt(P.X, P.Y);
if (htOnStateIcon in ht) then begin // checkbox
node := GetNodeAt(P.X, P.Y);
ToggleTreeViewCheckBoxes(node);
end else if (htOnLabel in ht) and assigned(FOnVerseChange) then begin // node
node := GetNodeAt(P.X, P.Y);
if assigned(node.Parent) and assigned(node.Parent.Parent) then
FOnVerseChange(Integer(node.Data));
end;
end;
procedure TBibleTreeView.CreateImageList;
procedure AddPngFromRes(res: string);
var
SrcBmp: TBitmap;
Picture: TPicture;
begin
Picture := TPicture.Create;
SrcBmp := TBitmap.Create;
try
Picture.LoadFromLazarusResource(res);
SrcBmp.Assign(Picture.Graphic);
FImages.Add(SrcBmp, nil);
finally
Picture.Free;
end;
end;
begin
FImages := TImageList.Create(self);
AddPngFromRes('checkbox-unchecked');
AddPngFromRes('checkbox-checked');
AddPngFromRes('checkbox-partial');
StateImages := FImages;
end;
constructor TBibleTreeView.Create(AnOwner: TComponent);
begin
inherited Create(AnOwner);
Parent := TWinControl(AnOwner);
ReadOnly := true;
CreateImageList;
FScope := etNone;
OnClick := @TreeViewClick;
FOnVerseChange := nil;
end;
destructor TBibleTreeView.Destroy;
begin
FImages.Free;
inherited Destroy;
end;
procedure TBibleTreeView.SelectAll;
var
node: TTreeNode;
begin
node := Items[0];
while assigned(node) do
begin
SetNodeStateIndex(node, ImgIndexChecked);
node := node.GetNextSibling;
end;
end;
procedure TBibleTreeView.SelectNone;
var
node: TTreeNode;
begin
node := Items[0];
while assigned(node) do
begin
SetNodeStateIndex(node, ImgIndexUnchecked);
node := node.GetNextSibling;
end;
end;
initialization
{$I bibletreeview.lrs}
end.