C / C++ / MFC

Re: GetSaveFileName: does not work propoerly when the option "Hide file extension for know file type" is checked

20-Mar-09 7:57

zouzoulikou wrote:
ofn.lpstrTitle = "Save pkp file"

You are missing a semicolon.

zouzoulikou wrote:
ofn.lpstrInitialDir = "C:\Documents and Settings\Administrator\My Documents";

Why are you not using double backslashes?

zouzoulikou wrote:
Unfortunately, the default displayed name is "Mydoc"...

This is expected behavior.

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zouzoulikou20-Mar-09 22:48

zouzoulikou

20-Mar-09 22:48

You're right. I must use double blackslashes. In fact, I've adapted the code before submitting it here.
So the correct code is :
ofn.lpstrInitialDir = "C:\\Documents and Settings\\Administrator\\My Documents";

Note: Any idea for my problem ?

Re: GetSaveFileName: does not work propoerly when the option "Hide file extension for know file type" is checked

David Crow21-Mar-09 16:11

Re: GetSaveFileName: does not work propoerly when the option "Hide file extension for know file type" is checked

21-Mar-09 16:11

zouzoulikou wrote:
Note: Any idea for my problem ?

What problem? Regardless of the setting, ofn.lpstrFile will contain the correct value (with the extension intact) if the OK button is clicked. You will have to correctly assign that member to a buffer, however, like:

char szBuffer[MAX_PATH] = "MyDoc.prefered";
ofn.lpstrFile = szBuffer;

norish21-Mar-09 1:54

norish

21-Mar-09 1:54

zouzoulikou wrote:
OPENFILENAME ofn = {0};
ofn.lStructSize = sizeof(OPENFILENAMEW);

different size isn't it?

how to use #pragma data_seq()

ernst2002053020-Mar-09 7:48

ernst20020530

20-Mar-09 7:48

I should write a Windows32 form, in which I can input Unicode. When I create multiple instances of application.all the form must display some content, and When I change the content, the content in all instances must change according to the changed Unicode.
Now I can get the content of input, but how can I put the value into the variable in commen memory area?

#include "stdafx.h"
#include "windows.h"
#include <memory.h>
#include <TCHAR.h>
//#pragma once

#pragma data_seq("Shared")
volatile wchar_t* content;
#pragma data_seq()
#pragma comment(linker, "/Section:Shared,RWS")

namespace ShareMemory2 {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

/// <summary>
/// Summary for Form1
///
/// WARNING: If you change the name of this class, you will need to change the
/// 'Resource File Name' property for the managed resource compiler tool
/// associated with all .resx files this class depends on. Otherwise,
/// the designers will not be able to interact properly with localized
/// resources associated with this form.
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::TextBox^ textBox1;
private: System::Windows::Forms::Button^ button1;
protected:

private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// textBox1
//
this->textBox1->Location = System::Drawing::Point(67, 26);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(164, 20);
this->textBox1->TabIndex = 0;
//
// button1
//
this->button1->Location = System::Drawing::Point(105, 64);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 1;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(296, 111);
this->Controls->Add(this->button1);
this->Controls->Add(this->textBox1);
this->Name = L"Form1";
this->Text = L"Form1";
this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
this->ResumeLayout(false);
this->PerformLayout();

}
#pragma endregion

private : System::String^ Pwchar_tToString(wchar_t* content){
System::IntPtr ptr(content);
System::String^ string = System::Runtime::InteropServices::Marshal::PtrToStringUni(ptr);
return string;
};

private : wchar_t *StringToPwchar_t(System::String^ str){
IntPtr ptr = System::Runtime::InteropServices::Marshal::StringToHGlobalUni(str);
wchar_t *string = reinterpret_cast<wchar_t*>(ptr.ToPointer());
return string;
};

private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) {
/*wchar_t**/ content=TEXT("abc");
//memcpy((void*)content,content2,4);
wchar_t* cont2=TEXT("abc");
int i=0;
this->textBox1->Text=Pwchar_tToString(cont2);
}

private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
wchar_t* in=StringToPwchar_t(this->textBox1->Text);
int i=0;
}
};

}

David Crow20-Mar-09 7:55

20-Mar-09 7:55

You might want to ask this in a more suitable forum.

ernst2002053020-Mar-09 8:04

ernst20020530

20-Mar-09 8:04

which forum? thanks

David Crow20-Mar-09 8:09

20-Mar-09 8:09

ernst20020530 wrote:
which forum?

The one that coincides with the language you are using.

ernst2002053020-Mar-09 8:18

ernst20020530

20-Mar-09 8:18

Yes I'm using C++ to code, can you help me figure out the idea?
Thanks

David Crow20-Mar-09 8:29

20-Mar-09 8:29

ernst20020530 wrote:
...I'm using C++...

Managed C++.

cmk20-Mar-09 10:38

cmk

20-Mar-09 10:38

Try changing:
volatile wchar_t* content;
to:
#define MAX_CONTENT_SZ <some value="">
volatile wchar_t content[MAX_CONTENT_SZ];

i.e. don't dynamically alloc shared data unless you are prepared to handle all multi-proc ownership issues.

...cmk

The idea that I can be presented with a problem, set out to logically solve it with the tools at hand, and wind up with a program that could not be legally used because someone else followed the same logical steps some years ago and filed for a patent on it is horrifying.
- John Carmack

Erase previous drawings

llp00na20-Mar-09 6:53

llp00na

20-Mar-09 6:53

Hi
I have got the following code:

Code:

drawDATA(Shapes shapes, CDC& cd){
// select pen ... ect
// draw shapes
cd.TextOut(X, Y, "DRAW1");
}

I am calling drawDATA from two methods drawA, drawB with: CClientDC dc(this) as parameter.

drawA(shapesA, dc); --> if user invokes action A
Invalidate()
drawB(shapesB, dc); --> if user invokes action B
Invalidate();

both methods draw the shapes, but I only want to show the latest shapes not both shapes of A and B.

If user clicks button A then i should show him shapes A
If he clicks Button B then I should show him shapes B.

If he clicks A , I should show shapes A first, and he continues and clicks B, I should erase shapes A and show shapes B only

SO iI need a way of erasing previous shapes
thank

llp00na

C^hris L^osinger20-Mar-09 7:09

C^hris L^osinger

20-Mar-09 7:09

Invalidate() doesn't redraw your window, it merely tells your window that the whole thing needs to be redrawn the next time the WM_PAINT message is handled.

if you want to erase the background, just fill it with the background color.

batch image processing

llp00na20-Mar-09 7:27

llp00na

20-Mar-09 7:27

I am drawing on top of a web browser control

So cant use the background colour

I tried UpdateWindow() but does not work

llp00na

C^hris L^osinger20-Mar-09 7:35

C^hris L^osinger

20-Mar-09 7:35

UpdateWindow just sends the WM_PAINT message to your app, it doesn't actually cause painting to happen. basically painting happens whenever your app has nothing else to do and your app gets around to processing the WM_PAINT message. that's not going to happen in the middle of a function (unless you're doing something like an old-school Message Pump between statements).

but, basically, there is no "erase" functionality. there is only draw. if you need to erase drawing A, you have to draw what was there before you drew A.

batch image processing

David Crow20-Mar-09 9:25

20-Mar-09 9:25

llp00na wrote:
I am drawing on top of a web browser control

Which means that anytime the Web browser control redraws itself, anything drawn on top of it goes away.

Code-o-mat20-Mar-09 7:30

Code-o-mat

20-Mar-09 7:30

Try RedrawWindow[^] instead of Invalidate...

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