* Implemented a FileOpen and FileSave dialog. Both are the same class. It's

  not 100% yet. See ToDo list in header of gui_dialogs unit.
* Minor bug fix in ComboBox component and added missing (required) properties.
* Fixed a bug in TfpgCustomGrid.Destroy. Creating a decendant of TfpgCustomGrid
  caused a crash in the destructor.
* Fixed bug in ListBox where scrollbar did not move with mouse wheel input.
* Added a new FileDialog example project.

2 files changed, 152 insertions, 0 deletions

diff --git a/examples/gui/filedialog/filedialog.lpi b/examples/gui/filedialog/filedialog.lpi
new file mode 100644
index 00000000..224f5a46
--- /dev/null
+++ b/examples/gui/filedialog/filedialog.lpi
@@ -0,0 +1,54 @@
+<?xml version="1.0"?>
+<CONFIG>
+  <ProjectOptions>
+    <PathDelim Value="/"/>
+    <Version Value="5"/>
+    <General>
+      <Flags>
+        <SaveOnlyProjectUnits Value="True"/>
+      </Flags>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <IconPath Value="./"/>
+      <TargetFileExt Value=""/>
+      <UseAppBundle Value="False"/>
+    </General>
+    <VersionInfo>
+      <ProjectVersion Value=""/>
+    </VersionInfo>
+    <PublishOptions>
+      <Version Value="2"/>
+      <IncludeFileFilter Value="*.(pas|pp|inc|lfm|lpr|lrs|lpi|lpk|sh|xml)"/>
+      <ExcludeFileFilter Value="*.(bak|ppu|ppw|o|so);*~;backup"/>
+    </PublishOptions>
+    <RunParams>
+      <local>
+        <FormatVersion Value="1"/>
+        <LaunchingApplication PathPlusParams="/usr/X11R6/bin/xterm -T 'Lazarus Run Output' -e $(LazarusDir)/tools/runwait.sh $(TargetCmdLine)"/>
+      </local>
+    </RunParams>
+    <RequiredPackages Count="1">
+      <Item1>
+        <PackageName Value="fpgui_package"/>
+        <MinVersion Minor="5" Valid="True"/>
+      </Item1>
+    </RequiredPackages>
+    <Units Count="1">
+      <Unit0>
+        <Filename Value="filedialog.lpr"/>
+        <IsPartOfProject Value="True"/>
+        <UnitName Value="filedialog"/>
+      </Unit0>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="5"/>
+    <CodeGeneration>
+      <Generate Value="Faster"/>
+    </CodeGeneration>
+    <Other>
+      <CustomOptions Value="-FUunits"/>
+      <CompilerPath Value="$(CompPath)"/>
+    </Other>
+  </CompilerOptions>
+</CONFIG>
diff --git a/examples/gui/filedialog/filedialog.lpr b/examples/gui/filedialog/filedialog.lpr
new file mode 100644
index 00000000..a5ff4d2a
--- /dev/null
+++ b/examples/gui/filedialog/filedialog.lpr
@@ -0,0 +1,98 @@
+program filedialog;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Classes,
+  fpgfx,
+  gui_form,
+  gui_dialogs,
+  gui_button,
+  gui_edit,
+  gui_label;
+
+
+type
+  TMainForm = class(TfpgForm)
+  private
+    btnQuit: TfpgButton;
+    btnOpenFile: TfpgButton;
+    btnSaveFile: TfpgButton;
+    edFilename: TfpgEdit;
+    procedure   btnQuitClick(Sender: TObject);
+    procedure   btnOpenFileClick(Sender: TObject);
+    procedure   btnSaveFileClick(Sender: TObject);
+  public
+    constructor Create(AOwner: TComponent); override;
+  end;
+
+{ TMainForm }
+
+procedure TMainForm.btnQuitClick(Sender: TObject);
+begin
+  Close;
+end;
+
+procedure TMainForm.btnOpenFileClick(Sender: TObject);
+var
+  dlg: TfpgFileDialog;
+begin
+  dlg := TfpgFileDialog.Create(nil);
+  try
+    if dlg.RunOpenFile then
+      edFilename.Text := dlg.FileName;
+  finally
+    dlg.Free;
+  end;
+end;
+
+procedure TMainForm.btnSaveFileClick(Sender: TObject);
+var
+  dlg: TfpgFileDialog;
+begin
+  dlg := TfpgFileDialog.Create(nil);
+  try
+    if dlg.RunSaveFile then
+      edFilename.Text := dlg.FileName;
+  finally
+    dlg.Free;
+  end;
+end;
+
+constructor TMainForm.Create(AOwner: TComponent);
+begin
+  inherited Create(AOwner);
+  WindowTitle := 'File dialog test';
+  SetPosition(100, 100, 500, 400);
+  
+  btnOpenFile := CreateButton(self, 10, 10, 110, 'Open File...', @btnOpenFileClick);
+  btnSaveFile := CreateButton(self, 10, btnOpenFile.Bottom + 8, 110, 'Save File...', @btnSaveFileClick);
+
+  edFilename := CreateEdit(self, 10, btnSaveFile.Bottom + 15, Width - 20, 24);
+  edFilename.Text := '';
+
+  btnQuit := CreateButton(self, 415, 370, 80, 'Quit', @btnQuitClick);
+  btnQuit.ImageName := 'stdimg.Quit';
+  btnQuit.ShowImage := True;
+  btnQuit.Anchors := [anRight, anBottom];
+
+  btnOpenFile.TabOrder := 0;
+end;
+
+procedure MainProc;
+var
+  frm: TMainForm;
+begin
+  fpgApplication.Initialize;
+  frm := TMainForm.Create(nil);
+  frm.Show;
+  fpgApplication.Run;
+end;
+
+begin
+  MainProc;
+end.
+