Working example #1
Comments
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Hi! Sure. #include "SDL.h"
#include "GCP.h"
SDL_Window *sdlWindow;
SDL_Renderer *sdlRenderer;
const int SCREEN_WIDTH = 800;
const int SCREEN_HEIGHT = 600;
class gcpWindow
{
private:
GCP_SPointer<GCP_Controller> Interface;
GCP_SPointer<GCP_Form> MainInterfaceForm;
GCP_SPointer<SStyle> mainStyle;
GCP_SPointer<GCP_ContextMenu> RightButtonMenu;
public:
gcpWindow(){init();}
void init()
{
//Main controller and form
Interface = GCP_SPointer<GCP_Controller> (new GCP_Controller(sdlRenderer,SCREEN_WIDTH,SCREEN_HEIGHT));
MainInterfaceForm = Interface->createForm(sdlRenderer);
////TTF Init (Weak point here)
string working_directory = "C:\\";
std::stringstream directory_path;
directory_path << working_directory.c_str() << "arial.ttf";
std::string directory_path_string = directory_path.str();
Interface->setFont(directory_path.str());
MainInterfaceForm->setCaption("Example Form");
//Example button with message box handler
GCP_SPointer<GCP_Button> bNew = GCP_SPointer<GCP_Button> (new GCP_Button());
bNew->setWidthHeight(105,25);
bNew->setCaption("Example Button");
bNew->setPosition(SCREEN_WIDTH/2-bNew->width/2,SCREEN_HEIGHT/2-bNew->height/2);
bNew->iType = GCP_BUTTON_ROUNDRECT;
bNew->setOnMouseLeftClick(this,&gcpWindow::onHelloWorldButtonClick);
MainInterfaceForm->addComponent(GCP_SPointer<GCP_FormComponent>(bNew));
int x0 = 100, y0 = 100, separation=30, i=0;
//Example Label with hint
GCP_SPointer<GCP_Label> label6 = GCP_SPointer<GCP_Label>(new GCP_Label());
label6->setPosition(x0,y0+separation*i);
label6->text = "Example Label:";
label6->INFO = "Example Hint";
MainInterfaceForm->addComponent(GCP_SPointer<GCP_FormComponent>(label6));
//Example Select with options
GCP_SPointer<GCP_Select> select = GCP_SPointer<GCP_Select>(new GCP_Select());
select->setPosition(x0+140,y0+separation*i-5);
select->setWidthHeight(130,separation-5);
select->options.draw_order = -1;
select->addItem("ex. select 1");
select->addItem("ex. select 2");
select->addItem("ex. select 3");
select->selectItem(0);
MainInterfaceForm->addComponent(GCP_SPointer<GCP_FormComponent>(select));
i++;
//Example Checkbox
GCP_SPointer<GCP_CheckBox> CheckBox1 = GCP_SPointer<GCP_CheckBox>(new GCP_CheckBox());
CheckBox1->setPosition(x0,y0+separation*i);
CheckBox1->text="Example Checkbox";
MainInterfaceForm->addComponent(GCP_SPointer<GCP_FormComponent>(CheckBox1));
//Some color schemas for interface
mainStyle = GCP_SPointer<SStyle>(new SStyle);
mainStyle->setColor(c_lime,c_red,c_orange,c_black);
mainStyle->iBorderWidth = 2;
mainStyle->cBorderColor = c_black;
mainStyle->iRoundCff = 2;
mainStyle->cTextFieldBackColor = c_orange;
mainStyle->colorHeadMenuBackground = c_orange;
mainStyle->colorHeadMenuFade = c_grey;
mainStyle->colorButtonBackground = c_white;
//Example Blocking Subform
GCP_SPointer<GCP_Form> OptionsForm = GCP_SPointer<GCP_Form>(new GCP_Form(sdlRenderer, 300, 400));
OptionsForm->isParentLocking = true;
OptionsForm->setStyle(mainStyle.getPointer());
OptionsForm->isVisible = false;
OptionsForm->isDragable = true;
OptionsForm->setPosition(SCREEN_WIDTH/2 - OptionsForm->width/2,SCREEN_HEIGHT/2 - OptionsForm->height/2);
string bcaption4 = "Example Form";
OptionsForm->setCaption(bcaption4);
MainInterfaceForm->addSubForm(OptionsForm);
i++;
//Button that opens subform
GCP_SPointer<GCP_Button> bForm = GCP_SPointer<GCP_Button> (new GCP_Button());
bForm->setWidthHeight(105,25);
bForm->setCaption("Example Form");
bForm->setPosition(x0,y0+separation*i);
bForm->iType = GCP_BUTTON_ROUNDRECT;
bForm->setOnMouseLeftClick(OptionsForm.getPointer(),&GCP_Form::toggleVisibility);
MainInterfaceForm->addComponent(GCP_SPointer<GCP_FormComponent>(bForm));
//Right button context menu
RightButtonMenu = GCP_SPointer<GCP_ContextMenu> (new GCP_ContextMenu());
RightButtonMenu->setPosition(100,100);
//First button in context menu
GCP_SPointer<GCP_Button> bcCreatePoint = GCP_SPointer<GCP_Button>(new GCP_Button());
bcCreatePoint->setWidthHeight(120,25);
bcCreatePoint->setCaption("Example Menu 1");
bcCreatePoint->iType = GCP_BUTTON_ROUNDRECT;
bcCreatePoint->setOnMouseLeftClick(this,&gcpWindow::onHelloWorldButtonClick);
RightButtonMenu->addButton(bcCreatePoint);
//A button with image in context menu
GCP_SPointer<GCP_Button> bcCenterView = GCP_SPointer<GCP_Button>(new GCP_Button());
bcCenterView->setWidthHeight(120,25);
bcCenterView->setIcon(working_directory+"image.bmp");
bcCenterView->iType = GCP_BUTTON_ROUNDRECT;
bcCenterView->setOnMouseLeftClick(this,&gcpWindow::onHelloWorldButtonClick);
RightButtonMenu->addButton(bcCenterView);
//Hide out menu
RightButtonMenu->isVisible = false;
RightButtonMenu->iType = GCP_MENU_MVERTICAL;
MainInterfaceForm->addComponent(RightButtonMenu);
//Add Main form handlers
MainInterfaceForm->setOnMouseRightClick(this,&gcpWindow::OnMouseGlobalRightClick);
MainInterfaceForm->setOnMouseLeftClick(RightButtonMenu.getPointer(),&GCP_ContextMenu::close);
}
void OnMouseGlobalRightClick(void *obj)
{
RightButtonMenu->open(MainInterfaceForm->mouse_x,MainInterfaceForm->mouse_y);
}
void onHelloWorldButtonClick(void *obj)
{
MainInterfaceForm->showmessage("Hello World!");
}
int update()
{
SDL_Event event;
SDL_RenderClear(sdlRenderer);
while( SDL_PollEvent( &event ) )
{
Interface->handleEvents(event); //Handle interface events
if(!MainInterfaceForm->isVisible)
return -1;
}
draw(); //Draw your logic
Interface->draw(); //Draw interface over it
SDL_RenderPresent(sdlRenderer);
return 0;
}
void draw()
{
//Draw your logic here
}
};
int main(int argc, char *argv[]) {
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER) != 0)
return 1;
sdlWindow = SDL_CreateWindow("GUI Check Point", 100, 100, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
if (sdlWindow == NULL)
return 2;
sdlRenderer = SDL_CreateRenderer(sdlWindow, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
if (sdlRenderer == NULL)
return 3;
SDL_SetRenderDrawColor(sdlRenderer,0,220,120,0);
gcpWindow wnd;
while(wnd.update() == 0)
SDL_Delay(10);
SDL_DestroyRenderer(sdlRenderer);
SDL_DestroyWindow(sdlWindow);
SDL_Quit();
return 0;
} |
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thank you for this code - somehow i have managed to run basic code based on source from messagebox cpp file. As I see you are using some new version of GCP since I cannot find anywhere GCP_SPointer definition. Additionally I would suggest:
Could you kindly also explain to me this code: I find this difficult to understand this (it is working in my test code but i have no idea what is going on) :/ Overall I think you have a chance to become primary GUI for SDL2 basing only on SDL - I didn't manage to find anything what would be working for me 👍 |
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As I see you have updated source meanwhile and my "repo" is outdated 🎯 |
Well, this is not exactly my code either. I used this example: The point is to send a class pointer (T* i_class) and a method of class T (U i_method) to some object. So later this object would be able to call this method as a delegate. More preciesly class T and its method would be stored in Container class described at GCP_Delegate.h getElementsByType would work just fine. |
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How to change text of this element: By pointer to MainInterfaceForm only?? |
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In order to change labels text you should store a GCP_SPointer<GCP_Label> label6 as a variable somewhere. Like MainInterfaceForm is declared as private variable of class gcpWindow and we could call it where ever we want. Drawing dynamic text is a challange. This is the most consuming operation which is really noticable at android devices. I store a data buffer structure which is changing (redrawing) only when text has been changed, otherwise it will just be applied by sdlRenderer. It helps, but not that much. The dynamic text rendering stiil needs to be improved. |
a. every object with text have some private "surface" which is updated only in case if "old" text differs from "current" text it would cuase rather simple way of accessing any element of form? I'm rather weak programmer so I will not be surprised if my thinking is not efficient enough ;) |
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a.b. - this is how it is working already. unable to compile latest version of GCP? What errors? |
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Errors:
and some later: Since i have loaded math.h it is defining M_PI but then sqrt and pow are causing similar error: D:\Programming\SDL_Init\SDL_Init\GCP_Math.h|50|error: 'pow' was not declared in this scope| Including always cmath resolves this. Removing GCP_Math:: fix issue
including this fix this: I have failed with rest: ||=== Build: Debug Win32 in SDL_Init (compiler: GNU GCC Compiler) ===| |
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I don't have GNU GCC |
I had to implement one this one: http://www.jb.man.ac.uk/~slowe/cpp/itoa.html
I had to include
Instead of i simply use only else part
#0 00451B9C GCP_SPointer<GCP_FormComponent>::operator->(this=0x1ae) (D:/Programming/SDL_Init/SDL_Init/GCP_SPointer.h:100) I also using mingw32 and IDE CodeBlocks on Win7x64- what is your IDE?? |
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I tested in Now I installed CodeBlocks. I was able to fix some errors and compile, but linking phase give me this error: Seems having problem with locale files. Anyway the code has been compiled so it should work on your side. Try test it. Commit: CodeBlocks compiler support. |
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Everything seems to be working now. Why you have introduced this SPointer? Whitout it everything looked easier :/ Are you planning to add name property and function getbynameelement? |
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In my program I manage a lot of objects (FormComponent) But if I do it so, the other interface would encounter an error when trying deleting his objectPtr. So I implemented SmartPointer to resolve such conflicts. If I delete an instance pointer somewhere I call object_spointer.setEmpty(true); So now other interfaces would know that pointer is to be deleted. And one of the most usefull things. Smart pointer keep reference count so it knows exactly when to call delete objectPtr; You don't need to trace your every pointer to prevent memory leaks. |
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I'm afraid that i also had to implement shared_ptr as well ;) What about this: |
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And I think it would be nice if Yours GUI would be rounded by some namespace just for cleaning up purposes |
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well, its an opensource project. you can create fork & pull all the changes you want |
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challenge accepted ;) |
Hi winsvega
Could you kindly show some working example for creating form with button and assigning some action to a button?
I would really appreciate. Your project seems to be very interesting but all I was able to figure was to create a message box :/
Sorry for contacting here but I dont see any other options here on GitHub
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