* Introduced a new property to TfpgWidget, called IsContainer for all

  components that act like containers (Panel, Form, etc). This optimizes
  the Component Alignment calls.
* All resizing calls now get routed through DoUpdateWindowPosition() so
  they have a more consistent execution path.
* OnResize now get fired when components get resized, and not just for
  Forms.
* HandleAlignments() is now only called when needed.
* Fixed the bug where Alignment didn't work when components are resized
  at runtime.
* Removed compiler warnings form gui_mru.pas unit.
* Memo's scrollbar now gets adjusted correctly when it's text 
  is modified via code.
* Minor bug fix when deleting line in a Memo component. The 'Index out of
  Bounds' error still occurs though. That will be fixed shortly.

3 files changed, 300 insertions, 0 deletions

diff --git a/examples/gui/alignment_resize/alignment_resize.lpi b/examples/gui/alignment_resize/alignment_resize.lpi
new file mode 100644
index 00000000..0da35584
--- /dev/null
+++ b/examples/gui/alignment_resize/alignment_resize.lpi
@@ -0,0 +1,55 @@
+<?xml version="1.0"?>
+<CONFIG>
+  <ProjectOptions>
+    <PathDelim Value="/"/>
+    <Version Value="6"/>
+    <General>
+      <Flags>
+        <SaveOnlyProjectUnits Value="True"/>
+      </Flags>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <IconPath Value="./"/>
+      <TargetFileExt Value=""/>
+      <Title Value="alignment_resize"/>
+    </General>
+    <VersionInfo>
+      <ProjectVersion Value=""/>
+    </VersionInfo>
+    <PublishOptions>
+      <Version Value="2"/>
+      <IgnoreBinaries Value="False"/>
+      <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 $(TargetCmdLine)"/>
+      </local>
+    </RunParams>
+    <RequiredPackages Count="1">
+      <Item1>
+        <PackageName Value="fpgui_toolkit"/>
+        <MinVersion Minor="6" Release="2" Valid="True"/>
+      </Item1>
+    </RequiredPackages>
+    <Units Count="1">
+      <Unit0>
+        <Filename Value="alignment_resize.lpr"/>
+        <IsPartOfProject Value="True"/>
+        <UnitName Value="alignment_resize"/>
+      </Unit0>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="5"/>
+    <CodeGeneration>
+      <Generate Value="Faster"/>
+    </CodeGeneration>
+    <Other>
+      <CustomOptions Value="-FUunits"/>
+      <CompilerPath Value="$(CompPath)"/>
+    </Other>
+  </CompilerOptions>
+</CONFIG>
diff --git a/examples/gui/alignment_resize/alignment_resize.lpr b/examples/gui/alignment_resize/alignment_resize.lpr
new file mode 100644
index 00000000..8c6b2b03
--- /dev/null
+++ b/examples/gui/alignment_resize/alignment_resize.lpr
@@ -0,0 +1,240 @@
+program alignment_resize;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Classes, SysUtils, fpgfx, gfxbase, gui_form, gui_button, gui_panel, gui_label,
+  gui_radiobutton, gui_memo;
+
+type
+
+  TMainForm = class(TfpgForm)
+  private
+    procedure btnGoClicked(Sender: TObject);
+    procedure btnResetClicked(Sender: TObject);
+    procedure PanelResized(Sender: TObject);
+  public
+    {@VFD_HEAD_BEGIN: MainForm}
+    btnName1: TfpgButton;
+    btnName2: TfpgButton;
+    pnlName1: TfpgPanel;
+    btnName3: TfpgButton;
+    btnName4: TfpgButton;
+    btnName5: TfpgButton;
+    btnName6: TfpgButton;
+    lblName1: TfpgLabel;
+    pnlName2: TfpgPanel;
+    rbName1: TfpgRadioButton;
+    rbName2: TfpgRadioButton;
+    rbName3: TfpgRadioButton;
+    memName1: TfpgMemo;
+    {@VFD_HEAD_END: MainForm}
+    procedure AfterCreate; override;
+  end;
+
+{@VFD_NEWFORM_DECL}
+
+
+
+{@VFD_NEWFORM_IMPL}
+
+procedure TMainForm.btnGoClicked(Sender: TObject);
+begin
+  if rbName1.Checked then
+  begin
+    pnlName1.SetPosition(4, 68, 240, 192);
+  end
+  else if rbName2.Checked then
+  begin
+    pnlName1.Width := 240;
+    pnlName1.Height := 192;
+    pnlName1.UpdateWindowPosition;
+  end
+  else if rbName3.Checked then
+  begin
+    pnlName1.MoveAndResizeBy(0, 0, 100, 100);
+  end;
+end;
+
+procedure TMainForm.btnResetClicked(Sender: TObject);
+begin
+  pnlName1.SetPosition(4, 68, 140, 92);
+end;
+
+procedure TMainForm.PanelResized(Sender: TObject);
+begin
+  memName1.Lines.Insert(0, FormatDateTime('HH:mm:ss', Time) + ' Panel.OnResize');
+end;
+
+procedure TMainForm.AfterCreate;
+begin
+  {@VFD_BODY_BEGIN: MainForm}
+  Name := 'MainForm';
+  SetPosition(316, 186, 467, 284);
+  WindowTitle := 'Runtime resize/alignment test';
+  WindowPosition := wpScreenCenter;
+  Sizeable := False;
+
+  btnName1 := TfpgButton.Create(self);
+  with btnName1 do
+  begin
+    Name := 'btnName1';
+    SetPosition(4, 4, 80, 24);
+    Text := 'Go';
+    FontDesc := '#Label1';
+    ImageName := '';
+    OnClick := @btnGoClicked;
+  end;
+
+  btnName2 := TfpgButton.Create(self);
+  with btnName2 do
+  begin
+    Name := 'btnName2';
+    SetPosition(4, 32, 80, 24);
+    Text := 'Reset';
+    FontDesc := '#Label1';
+    ImageName := '';
+    TabOrder := 1;
+    OnClick := @btnResetClicked;
+  end;
+
+  pnlName1 := TfpgPanel.Create(self);
+  with pnlName1 do
+  begin
+    Name := 'pnlName1';
+    SetPosition(4, 68, 140, 92);
+    Text := '';
+    BackgroundColor := clDarkKhaki;
+    OnResize := @PanelResized;
+  end;
+
+  btnName3 := TfpgButton.Create(pnlName1);
+  with btnName3 do
+  begin
+    Name := 'btnName3';
+    SetPosition(8, 8, 24, 24);
+    Text := '1';
+    FontDesc := '#Label1';
+    ImageName := '';
+  end;
+
+  btnName4 := TfpgButton.Create(pnlName1);
+  with btnName4 do
+  begin
+    Name := 'btnName4';
+    SetPosition(108, 8, 24, 24);
+    Anchors := [anRight,anTop];
+    Text := '2';
+    FontDesc := '#Label1';
+    ImageName := '';
+    TabOrder := 1;
+  end;
+
+  btnName5 := TfpgButton.Create(pnlName1);
+  with btnName5 do
+  begin
+    Name := 'btnName5';
+    SetPosition(8, 60, 24, 24);
+    Anchors := [anLeft,anBottom];
+    Text := '3';
+    FontDesc := '#Label1';
+    ImageName := '';
+    TabOrder := 2;
+  end;
+
+  btnName6 := TfpgButton.Create(pnlName1);
+  with btnName6 do
+  begin
+    Name := 'btnName6';
+    SetPosition(108, 60, 24, 24);
+    Anchors := [anRight,anBottom];
+    Text := '4';
+    FontDesc := '#Label1';
+    ImageName := '';
+    TabOrder := 3;
+  end;
+
+  lblName1 := TfpgLabel.Create(self);
+  with lblName1 do
+  begin
+    Name := 'lblName1';
+    SetPosition(272, 4, 116, 16);
+    FontDesc := '#Label2';
+    Text := 'Update method';
+  end;
+
+  pnlName2 := TfpgPanel.Create(self);
+  with pnlName2 do
+  begin
+    Name := 'pnlName2';
+    SetPosition(256, 12, 4, 264);
+    Style := bsLowered;
+    Text := '';
+  end;
+
+  rbName1 := TfpgRadioButton.Create(self);
+  with rbName1 do
+  begin
+    Name := 'rbName1';
+    SetPosition(288, 28, 172, 20);
+    Checked := True;
+    FontDesc := '#Label1';
+    TabOrder := 5;
+    Text := 'SetPosition()';
+  end;
+
+  rbName2 := TfpgRadioButton.Create(self);
+  with rbName2 do
+  begin
+    Name := 'rbName2';
+    SetPosition(288, 48, 172, 20);
+    FontDesc := '#Label1';
+    TabOrder := 6;
+    Text := 'UpdateWindowPosition()';
+  end;
+
+  rbName3 := TfpgRadioButton.Create(self);
+  with rbName3 do
+  begin
+    Name := 'rbName3';
+    SetPosition(288, 68, 172, 20);
+    FontDesc := '#Label1';
+    TabOrder := 7;
+    Text := 'MoveAndResizeBy()';
+  end;
+
+  memName1 := TfpgMemo.Create(self);
+  with memName1 do
+  begin
+    Name := 'memName1';
+    SetPosition(272, 104, 184, 164);
+    FontDesc := '#Edit1';
+    TabOrder := 8;
+  end;
+
+  {@VFD_BODY_END: MainForm}
+end;
+
+
+procedure MainProc;
+var
+  frm: TMainForm;
+begin
+  fpgApplication.Initialize;
+  frm := TMainForm.Create(nil);
+  try
+    frm.Show;
+    fpgApplication.Run;
+  finally
+    frm.Free;
+  end;
+end;
+
+begin
+  MainProc;
+end.
+
+
diff --git a/examples/gui/alignment_resize/extrafpc.cfg b/examples/gui/alignment_resize/extrafpc.cfg
new file mode 100644
index 00000000..073dc4b6
--- /dev/null
+++ b/examples/gui/alignment_resize/extrafpc.cfg
@@ -0,0 +1,5 @@
+-FUunits
+-Fu../../../lib
+-Xs
+-XX
+-CX