HTML edit and view control.
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Hello, and thanks for reading my post hopefully you can help me. :(( My problem is i need code or a control that is native with low-overhead using Microsoft Visual C++ .NET that allows a user to add images and text. Exactly like a wordpad, however, it needs to also be able to display (and edit). It seems quite simple but i need to display HTML code. I took a look at the RichTextBox control and choked, it seemed to have a complicated format for storeing the images and text formatting.. I was hopeing to be able to write a function that takes a argument of HTML code and convert this into some cordinates for the text and images (supporting only basic HTML) and use the System::Drawing2D to draw the text but i run into a problem. I can not figure out a way to tell how long in pixels or whatever how long the string will be when it is written out onto the picturebox or form. Graphics * g = this->CreateGraphics(); g->DrawString( ... blah .. blah , 10, 10 ); No, way i can know where to start drawing my image if for instance i had something like. "blah blah blah [img src=...]" :(( btw: This is for the compose form of my mail application. So user can write their email, insert images, and view emails.
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Hello, and thanks for reading my post hopefully you can help me. :(( My problem is i need code or a control that is native with low-overhead using Microsoft Visual C++ .NET that allows a user to add images and text. Exactly like a wordpad, however, it needs to also be able to display (and edit). It seems quite simple but i need to display HTML code. I took a look at the RichTextBox control and choked, it seemed to have a complicated format for storeing the images and text formatting.. I was hopeing to be able to write a function that takes a argument of HTML code and convert this into some cordinates for the text and images (supporting only basic HTML) and use the System::Drawing2D to draw the text but i run into a problem. I can not figure out a way to tell how long in pixels or whatever how long the string will be when it is written out onto the picturebox or form. Graphics * g = this->CreateGraphics(); g->DrawString( ... blah .. blah , 10, 10 ); No, way i can know where to start drawing my image if for instance i had something like. "blah blah blah [img src=...]" :(( btw: This is for the compose form of my mail application. So user can write their email, insert images, and view emails.
nm; I figured out how to do it. Using label and picture box controls. :-) I convert HTML into my own structored format of text, image, and tag classes linked together then the main class displays these onto a surface and using autoscrolling - *magic* it looks just like a webpage.. Well, almost. With a little work it would. ----------------------------------------------------------------------------
// The header #pragma once using namespace System; using namespace System::Drawing; using namespace System::Drawing::Drawing2D; using namespace System::Windows::Forms; __gc class mlr_lb { public: mlr_lb(); ~mlr_lb(); }; __gc class mlr_txt { public: mlr_txt(); ~mlr_txt(); Drawing::Color color; Drawing::Font * font; String * txt; }; __gc class mlr_img { public: mlr_img(); ~mlr_img(); PictureBoxSizeMode sizemode; String * path; Int32 width; Int32 height; }; __gc struct mlr_lnk { Object * obj; mlr_lnk * next; }; __gc class mlr { public: mlr(void); ~mlr(void); Int32 x; Int32 y; mlr_lnk * lnk; Boolean RemovePrevCtrls( Form * f ); Boolean Render( Form * f, Graphics * g, Int32 x, Int32 y, Int32 w, Int32 h ); };// The source. #include "StdAfx.h" #include ".\mlr.h" #using String * JoinStrAr( String * s[], Int32 x, Int32 l, String * d ) { String * str = S""; for( Int32 index = x; index < x+l; index++ ) { str = S""->Concat( str->Trim(), d, s[index]->Trim(), d); } if(str->Length < 1) return str; return str->Substring( 0, str->Length - d->Length ); } String * MakeWidthFit( String * s, System::Windows::Forms::Label * l, Int32 w ) { l->Text = s; if( l->Width > w ) { String * ls[] = s->Trim()->Split( S" "->ToCharArray() ); for( Int32 index = ls->Length; index > -1; index-- ) { l->Text = JoinStrAr( ls, 0, index, " " )->Trim(); if( l->Width <= w ) { return JoinStrAr( ls, index, ls->Count - index, " " ); } } return s; /* it's just a long long line. :-) */ } return NULL; } // mlr::mlr(void) { } mlr::~mlr(void) { } Boolean mlr::RemovePrevCtrls( Form * f ) { Int32 cnt; start:; cnt = f->Controls->Count; for( Int32 index = 1; index < cnt; index++ ) if( f->Controls->get_Item( index )->Tag->ToString()->CompareTo( S"MLR_CTRL" ) == 0 ) { f->Controls->RemoveAt( index ); goto start; } return true; } Boolean mlr::Render( Form * f, Graphics * g, Int32 x, Int32 y, Int32 w, Int32 h ) { String * str; Int32 cx = x; Int32 cy