Rich,
When you make a PageControl invisible as you planned, what had you
planned to be in that same now open space? I wouldn't worry about making
the visible/invisible, but would just use the Splitter itself to cover up
the pane you don't wish the user to see. Just reset the appropriate
Splitter bar's position to it's max which in effect would cover up the
PageControl in its right-most pane. The PageControl in the left-most Pane
of the same Splitter would then automatically become wider so that no empty
space exists, or you could make it so that all other splitters change their
positions so that the other PageControls share the extra width between them.
It's difficult knowing exactly what you are trying to accomplish
without actually seeing it. I have the problem all the time! <g>
from Robert Meek dba "Tangentals Design"
e-mail: [EMAIL PROTECTED]
Freelance Windows Programming for XP and Vista
Also proud to be a Moderator of the "Delphi-List" at elists.org
"Reality cannot be explained...only enjoyed or endured as your current
perspective allows!"
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Rich Cooper
Sent: Sunday, May 11, 2008 11:41 AM
To: 'Delphi-Talk Discussion List'
Subject: RE: Splitters and PageControls
Hi Robert,
Yes, we're both talking about the TSplitter component on the "Additional"
component palette. All my three splitters modify the size of the
PageControl on the immediate right of that splitter. All the splitters are
set to alRight, and the fourth PageControl, which has no splitter, is set to
alClient. That means I can resize the form, and the fourth PageControl
takes up the slack.
I have nearly given up making the three rightmost PageControls switch
between visible and not visible - I haven't been able to figure out what
happens to the PageControl and its associated Splitter when I make it
invisible, so I haven't figured out how to reposition the three Splitters
and three PageControls when changing visibility settings. I guess I could
root through the watch window and set up cases to figure out how the various
positions change when one or more is made invisible, but I haven't gotten
there yet.
But I have figured out how to keep the PageControls from disappearing when I
adjust their width to too small a value. Here is an event I use to keep the
Details PageControl from getting narrower than 30 pixels:
procedure TfmConversation.spDetailsCanResize(Sender: TObject;
var NewSize: Integer; var Accept: Boolean);
begin
{Be sure the Details component can be seen}
if NewSize<=30 then Accept := False
else Accept := True;
end;
Sincerely,
Rich Cooper
EnglishLogicKernel.com
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Robert Meek
Sent: Sunday, May 11, 2008 8:21 AM
To: 'Delphi-Talk Discussion List'
Subject: RE: Splitters and PageControls
Rich,
Perhaps we're not in synch on what a "Splitter" is. When I refer to
a "Splitter" I mean a visual control that looks like a Panel having a
moveable bar splitting the panel into two Panes. The bar can be set to
split the Panes vertically or horizontally.
To set things up as you describe, I would first add a splitter to my
Form set to alClient and its bar set to Vertical. Then I would add a second
Splitter to the first Splitter's Left Pane set to alClient, and a third
Splitter to the first Splitter's Right Pane set to alClient. You now have 4
separate resizable Panes that you can use the way you likee.
From your description below, I would put the
[pcConversations-PageControl] on the Second Splitter's Left Pane set to
alClient, the [pcDetails-PageControl] in the Second Splitter's Right Pane
set to alClient, the [pcObjects-Pagecontrol] in the Third Splitter's Left
Pane set to alClient, and the [pcActions-PageControl] in the Third
Splitter's Right Pane set to alClient.
Next you would have to decide how you want the form and Splitters to
react when one or more of the PageControls is made invisible. For example,
if you make the [pcActions-PageControl] to disappear, you could do it two
ways since it's in the right Pane of Splitter 3. You could reposition it's
bar to it's max to cover the PageControl up, which would make the
[pcObjects-Pagecontrol] twice as wide as it was. Or you could also
re-position the bar of Splitter 1 and/or 2 at the same time to even out the
widths of the remaining three PageControls. Or you could instead set the
bar for Splitter 3 to its max position but instead of resizing the other
Splitter's just readjust the Form's width!
Doing this allows you many options as to what is visible or not and
how visibility effects pane and/or Form size. All you need to do is create
events to do exactly what you want, then save the Splitter.position for each
Splitter and the Form's width to an inifile and read and set them again when
the user calls one of the events.
Anyway, all this depends on if we're even talking about the same
type of control! <g>
from Robert Meek dba "Tangentals Design"
e-mail: [EMAIL PROTECTED]
Freelance Windows Programming for XP and Vista
Also proud to be a Moderator of the "Delphi-List" at elists.org
"Reality cannot be explained...only enjoyed or endured as your current
perspective allows!"
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Rich Cooper
Sent: Saturday, May 10, 2008 11:55 AM
To: 'Delphi-Talk Discussion List'
Subject: RE: Splitters and PageControls
Hi Robert,
All the Splitters are set align=alRight, and each splitter is immediately to
the left of its related PageControl.
I'm using D7 with Vista, and the Splitters don't have a property named
"UsePercent". That must be a new property later than D7.
The best pictorial description is this one:
[pcConversations]spDetails[pcDetails]spObjects[pcObjects]spActions[pcActions
]
As it shows, there are four PCs and three Splitters.
Sincerely,
Rich Cooper
EnglishLogicKernel.com
[EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Robert Meek
Sent: Saturday, May 10, 2008 12:06 AM
To: 'Delphi-Talk Discussion List'
Subject: RE: Splitters and PageControls
Rich,
If each Pagecontrol is set to alRight how, where, and when are their
left sides being anchored? And you also didn't say how the splitters
themselves are setup. For example, do you have one splitter set to alClient
and parented by the form, and then a second Splitter set to alClient in one
side's pane of the first Splitter? And also do you have the Splitters set
to UsePercent = True or False?
If you like I'd be happy to throw an example of how I'd do it for
you and send it along, but I would need to know the answers to the above,
and also if the three PageConrols are the only components ever seen on this
form except for the two Splitter bars even when one or more is invisible.
from Robert Meek dba "Tangentals Design"
e-mail: [EMAIL PROTECTED]
Freelance Windows Programming for XP and Vista
Also proud to be a Moderator of the "Delphi-List" at elists.org
"Reality cannot be explained...only enjoyed or endured as your current
perspective allows!"
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Rich Cooper
Sent: Friday, May 09, 2008 12:31 PM
To: 'Delphi-Talk Discussion List'
Subject: RE: Splitters and PageControls
Not quite like that. Every TPageControl except the left most
(pcConversations) has its align property set to alRight, and each of them
has an associated splitter width=3, positioned just to left of the
TPageControl. That's how the program starts running. Visually, the panels
are as shown below:
[pcConversations]spDetails[pcDetails]spObjects[pcObjects]spActions[pcActions
]
Where the Hungarian prefix "sp" is for splitter, and "pc" is for
PageControl.
While the program is running, I want to let my user make any of the
TPageControls visible or not visible in any combination. But when I turn
off one page control's visible property, it gets positioned somewhere away
from its original position. Then when I turn it visible again, its
associated splitter has moved, and no longer fulfills the function of
adjusting the TPageControl's width, since it is no longer just to the left
of the TPageControl.
Here is some code that turns ALL TPageControls off and on at the same time,
in right to left order:
procedure TurnOffAllPageControls; {in left to right order}
begin
fmConversation.pcConversations.Align := alNone;
fmConversation.spDetails.Align := alNone;
fmConversation.pcDetails.Align := alNone;
fmConversation.spDetails.Visible := False;
fmConversation.pcDetails.Visible := False;
fmConversation.spObjects.Align := alNone;
fmConversation.pcObjects.Align := alNone;
fmConversation.spObjects.Visible := False;
fmConversation.pcObjects.Visible := False;
fmConversation.spActions.Align := alNone;
fmConversation.pcActions.Align := alNone;
fmConversation.spActions.Visible := False;
fmConversation.pcActions.Visible := False;
end;
procedure TurnOnAllPageControls; {in right to left order}
begin
fmConversation.pcActions.Left := fmConversation.Width-16;
fmConversation.pcActions.Align := alRight;
fmConversation.pcActions.Visible := True;
fmConversation.spActions.Align := alRight;
fmConversation.spActions.Visible := True;
fmConversation.pcObjects.Align := alRight;
fmConversation.pcObjects.Visible := True;
fmConversation.spObjects.Align := alRight;
fmConversation.spObjects.Visible := True;
fmConversation.pcDetails.Align := alRight;
fmConversation.pcDetails.Visible := True;
fmConversation.spDetails.Align := alRight;
fmConversation.spDetails.Visible := True;
fmConversation.pcConversations.Align := alClient;
end;
As long as I turn them all off in right to left order, then all on in right
to left order, everything stays ok. But when I turn just one pc off, it
gets moved because the other pcs to the left of it get adjusted due to the
alRight setting of all the pc and sp components.
What I need is a design concept that lets me adjust the position of each
page control and its associated splitter. I'm still working on defining
that concept.
-Rich
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Robert Meek
Sent: Thursday, May 08, 2008 8:13 PM
To: 'Delphi-Talk Discussion List'
Subject: RE: Splitters and PageControls
If I'm reading this correctly, you have a form which is divided into
3 panes. The left-most ConversationPane is always visible and is set to
alLeft and of a width that is pre-set to always be the same. Then you have
a splitter set to alRight with its top and left anchors set to always meet
the right-edge of the left-most ConversationsPane. In the splitter's
right-most panel you have set to alClient an ActionsPane, You then say that
in the splitter's left-pane you repeat this setup for an ObjectsPane, yet
this would infer that you have added a whole new splitter to the first
splitter's left pane and set to alClient, and with the ObjectsPane set to
alClient in the second Splitter's left-most Panel!
I know this cannot be correct because it is not only redundant, but
of no real use in anyway I can figure out no matter which of these "panes"
are PageControls or some other component types!
So perhaps THIS is what you are trying to describe:
A Form on which you have added a Splitter set to alClient. In its
left-most pane you have added a second Splitter set to alClient as well. In
the Splitter's right-most pane you have added a pageControl set to alClient.
In the second Splitter's left-most pane you have added a PageControl set to
alClient, and in its right-most pane another PageControl set to alClient as
well. The PageControls named from left to right appear as pcConversations,
pcObjects, and pcActions. Depending upon events controlled from a popup
menu on the pcConversations PageControl, you wish for one or both of the
other two PageControls to be visible or not simultaneously, while the
pcConversations PageControl is always visible and static down to a min Width
Contraint.
More than likely I would want the Form itself not to ever change
it's width based upon any particular PageControl being visible or not, as
that is confusing to the user's eyes. Instead, I would want the
pcConversations PageControl to increase in width via increasing the
secondary Splitter's left-most Pane being increased in width as required
when ever one or both of the other two PageControls are made invisible.
So the way I would handle this is to reset the second Splitter's
Percentage to 100% or to its max position so as it make its left-most pane
and the pcConversations PageControl as wide as possible whenever the
pcObjects PageControl must disappear which can be accomplished simply by
altering its Splitter's position or percentage as just stated. I would do
exactly the same thing to the Position or Percentage of the original
Splitter when ever the pcActions pane needs to disappear as well. This
makes each one independent of the other so that they can be made to
disappear and/or re-appear in whatever order and/or sequence the user wants,
and to cause the pcConversations PageControl to react by getting wider or
thinner as needed to fill in the addition empty space or allow for the
additionally needed space depending upon how the other two PageControls are
altered and without having to worry about the possibility that the Form
itself may have had its own width changed between any of the events!
Note: As I've used this same technique myself, depending upon the
Splitter type and brand you are employing, and also on how you have it's
borders and/or frames setup visually, you may need to play around with these
settings as you click on these events so as to make things appear as "clean"
as possible. What I have had to do in the past was actually make the
Splitter bar width 0 when set to its max position and then to its default
width again when resized to make both its panes visible again otherwise they
often look clumsy all at one side!
HTH's
from Robert Meek dba "Tangentals Design"
e-mail: [EMAIL PROTECTED]
Freelance Windows Programming for XP and Vista
Also proud to be a Moderator of the "Delphi-List" at elists.org
"Reality cannot be explained...only enjoyed or endured as your current
perspective allows!"
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Rich Cooper
Sent: Thursday, May 08, 2008 3:53 PM
To: 'Delphi-Talk Discussion List'
Subject: Splitters and PageControls
Hi All,
I have a form with three PageControls on it. The one on the left
(pcConversations) is always visible. There is a menu which lets the user
check or uncheck whether the other two PageControls are visible. Those two
PageControls are called pcActions and pcObjects. pcActions is on the right
side of the form, align=alRight, and there is a splitter (spActions) with
align=alRight flush on the left side of pcActions. The same structure is
used for pcObjects (just to the left of spActions and pcActions) and
spObjects (just to the left of pcObjects).
Now I want to write the handlers for the 'checked' property of the two menu
items <View | Objects> and <View | Actions>. Here is the first attempt at
writing these handlers:
procedure TfmConversation.Objects1Click(Sender: TObject);
begin
Objects1.Checked := not Objects1.Checked;
spObjects.Left := pcObjects.Left-7;
spActions.Left := pcActions.Left-7;
pcObjects.Visible := Objects1.Checked;
end;
procedure TfmConversation.Actions1Click(Sender: TObject);
begin
Actions1.Checked := not Actions1.Checked;
spActions.Left := pcActions.Left-7;
spObjects.Left := pcObjects.Left-7;
pcActions.Visible := Actions1.Checked;
end;
The problem is that the splitters and the PageControls don't stay in the
right places. If I make pcActions.visible=false and pcObjects.visible=false
(by using the checks in the menu) everything is OK. But then when I bring
them back to visible (again by using menu checks), they are in the wrong
place.
Does anyone know how to handle turning the PageControls and splitters
visible and back to invisible without changing the left to right order of
the components on the form?
Thanks for any comments,
Rich
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