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Samples: Browser - use ImGui based renderer config dialog
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@paroj
paroj committed Feb 17, 2024
1 parent e5a8c7b commit 847e8a1
Showing 1 changed file with 38 additions and 84 deletions.
122 changes: 38 additions & 84 deletions Samples/Browser/include/SampleBrowser.h
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,9 @@
#ifndef __SampleBrowser_H__
#define __SampleBrowser_H__

#include "OgreImGuiOverlay.h"
#include "OgreOverlayManager.h"
#include "OgreRenderTargetListener.h"
#include "SampleContext.h"
#include "SamplePlugin.h"
#include "OgreTrays.h"
Expand Down Expand Up @@ -66,7 +69,7 @@ namespace OgreBites
| The OGRE Sample Browser. Features a menu accessible from all samples,
| dynamic configuration, resource reloading, node labeling, and more.
=============================================================================*/
class SampleBrowser : public SampleContext, public TrayListener
class SampleBrowser : public SampleContext, public TrayListener, public Ogre::RenderTargetListener
{
#ifdef OGRE_STATIC_LIB
typedef std::map<Ogre::String, SamplePlugin*> PluginMap;
Expand All @@ -88,7 +91,6 @@ namespace OgreBites
mSampleSlider = 0;
mTitleLabel = 0;
mDescBox = 0;
mRendererMenu = 0;
mCarouselPlace = 0.0f;

#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE_IOS
Expand Down Expand Up @@ -285,6 +287,15 @@ namespace OgreBites
}
else if (b->getName() == "Configure") // enter configuration screen
{
mOwnsImGuiOverlay = !Ogre::OverlayManager::getSingleton().getByName("ImGuiOverlay");
auto imguiOverlay = initialiseImGui();
imguiOverlay->addFont("SdkTrays/Caption", "Essential");
imguiOverlay->setZOrder(300);
imguiOverlay->show();

mWindow->addListener(this);
mInputListenerChain = TouchAgnosticInputListenerChain(mWindow, {this, mTrayMgr, getImGuiInputListener()});

mTrayMgr->removeWidgetFromTray("StartStop");
mTrayMgr->removeWidgetFromTray("Configure");
#if OGRE_PLATFORM != OGRE_PLATFORM_ANDROID
Expand All @@ -309,20 +320,17 @@ namespace OgreBites
mTrayMgr->removeWidgetFromTray(TL_LEFT, 0);
}

mTrayMgr->moveWidgetToTray("ConfigLabel", TL_LEFT);
mTrayMgr->moveWidgetToTray(mRendererMenu, TL_LEFT);
mTrayMgr->moveWidgetToTray("ConfigSeparator", TL_LEFT);

mRendererMenu->selectItem(mRoot->getRenderSystem()->getName());

windowResized(mWindow);
}
else if (b->getName() == "Back") // leave configuration screen
{
while (mTrayMgr->getWidgets(mRendererMenu->getTrayLocation()).size() > 3)
{
mTrayMgr->destroyWidget(mRendererMenu->getTrayLocation(), 3);
}
if(mOwnsImGuiOverlay)
Ogre::OverlayManager::getSingleton().destroy("ImGuiOverlay"); // bring down overly to avoid interfering with samples
else
Ogre::ImGuiOverlay::NewFrame(); // clear dialog

mInputListenerChain = TouchAgnosticInputListenerChain(mWindow, {this, mTrayMgr});
mWindow->removeListener(this);

while (!mTrayMgr->getWidgets(TL_NONE).empty())
{
Expand All @@ -331,9 +339,6 @@ namespace OgreBites

mTrayMgr->removeWidgetFromTray("Apply");
mTrayMgr->removeWidgetFromTray("Back");
mTrayMgr->removeWidgetFromTray("ConfigLabel");
mTrayMgr->removeWidgetFromTray(mRendererMenu);
mTrayMgr->removeWidgetFromTray("ConfigSeparator");

mTrayMgr->moveWidgetToTray("StartStop", TL_RIGHT);
#if OGRE_PLATFORM != OGRE_PLATFORM_ANDROID
Expand All @@ -349,36 +354,30 @@ namespace OgreBites
}
else if (b->getName() == "Apply") // apply any changes made in the configuration screen
{
bool reset = false;

Ogre::RenderSystem* rs = mRoot->getRenderSystemByName(mRendererMenu->getSelectedItem());
auto options = rs->getConfigOptions();

// collect new settings and decide if a reset is needed

if (mRendererMenu->getSelectedItem() != mRoot->getRenderSystem()->getName()) {
reset = true;
}

for (unsigned int i = 3; i < mTrayMgr->getWidgets(mRendererMenu->getTrayLocation()).size(); i++)
{
SelectMenu* menu = (SelectMenu*)mTrayMgr->getWidgets(mRendererMenu->getTrayLocation())[i];
if (menu->getSelectedItem() != options[menu->getCaption()].currentValue)
{
rs->setConfigOption(menu->getCaption(), menu->getSelectedItem());
reset = true;
}
}

// reset with new settings if necessary
if (reset) reconfigure(mRendererMenu->getSelectedItem());
reconfigure(mNextRenderer);
}
else
{
mRoot->queueEndRendering(); // exit browser
}
}

void preViewportUpdate(const Ogre::RenderTargetViewportEvent& evt) override
{
Ogre::ImGuiOverlay::NewFrame();

auto flags = ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoCollapse |
ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoMove;
auto center = ImGui::GetMainViewport()->GetCenter();
if(mWindow->getWidth() <= 1280)
ImGui::SetNextWindowPos(ImVec2(0, center.y), ImGuiCond_Always, ImVec2(0.f, 0.5f));
else
ImGui::SetNextWindowPos(center, ImGuiCond_Always, ImVec2(0.5f, 0.5f));
ImGui::Begin("Configuration", NULL, flags);
Ogre::RenderingSettings(mNextRenderer);
ImGui::End();
}

/*-----------------------------------------------------------------------------
| Handles menu item selection changes.
-----------------------------------------------------------------------------*/
Expand Down Expand Up @@ -457,36 +456,6 @@ namespace OgreBites
if (mCurrentSample != s) ((Button*)mTrayMgr->getWidget("StartStop"))->setCaption("Start Sample");
else ((Button*)mTrayMgr->getWidget("StartStop"))->setCaption("Stop Sample");
}
else if (menu == mRendererMenu) // renderer selected, so update all settings
{
while (mTrayMgr->getWidgets(mRendererMenu->getTrayLocation()).size() > 3)
{
mTrayMgr->destroyWidget(mRendererMenu->getTrayLocation(), 3);
}

auto options = mRoot->getRenderSystemByName(menu->getSelectedItem())->getConfigOptions();

unsigned int i = 0;

// create all the config option select menus
for (Ogre::ConfigOptionMap::iterator it = options.begin(); it != options.end(); it++)
{
i++;
SelectMenu* optionMenu = mTrayMgr->createLongSelectMenu
(TL_LEFT, "ConfigOption" + Ogre::StringConverter::toString(i), it->first, 450, 240, 10);
optionMenu->setItems(it->second.possibleValues);

// if the current config value is not in the menu, add it
if(optionMenu->containsItem(it->second.currentValue) == false)
{
optionMenu->addItem(it->second.currentValue);
}

optionMenu->selectItem(it->second.currentValue);
}

windowResized(mWindow);
}
}

/*-----------------------------------------------------------------------------
Expand Down Expand Up @@ -985,20 +954,6 @@ namespace OgreBites
mTrayMgr->createButton(TL_NONE, "Apply", "Apply Changes");
mTrayMgr->createButton(TL_NONE, "Back", "Go Back");

// create configuration screen label and renderer menu
mTrayMgr->createLabel(TL_NONE, "ConfigLabel", "Configuration");
mRendererMenu = mTrayMgr->createLongSelectMenu(TL_NONE, "RendererMenu", "Render System", 450, 240, 10);
mTrayMgr->createSeparator(TL_NONE, "ConfigSeparator");

// populate render system names
Ogre::StringVector rsNames;
Ogre::RenderSystemList rsList = mRoot->getAvailableRenderers();
for (unsigned int i = 0; i < rsList.size(); i++)
{
rsNames.push_back(rsList[i]->getName());
}
mRendererMenu->setItems(rsNames);

populateSampleMenus();
}

Expand Down Expand Up @@ -1098,7 +1053,6 @@ namespace OgreBites
mSampleSlider = 0;
mTitleLabel = 0;
mDescBox = 0;
mRendererMenu = 0;
mHiddenOverlays.clear();
mThumbs.clear();
mCarouselPlace = 0;
Expand Down Expand Up @@ -1152,7 +1106,6 @@ namespace OgreBites
Slider* mSampleSlider; // sample slider bar
Label* mTitleLabel; // sample title label
TextBox* mDescBox; // sample description box
SelectMenu* mRendererMenu; // render system selection menu
std::vector<Ogre::Overlay*> mHiddenOverlays; // sample overlays hidden for pausing
std::vector<Ogre::OverlayContainer*> mThumbs; // sample thumbnails
Ogre::Real mCarouselPlace; // current state of carousel
Expand All @@ -1167,6 +1120,7 @@ namespace OgreBites
#endif
bool mIsShuttingDown;
bool mGrabInput;
bool mOwnsImGuiOverlay;
};
}

Expand Down

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