diff --git a/imgui.cpp b/imgui.cpp index a43fc5ed..2b51fa58 100644 --- a/imgui.cpp +++ b/imgui.cpp @@ -920,6 +920,9 @@ static const float NAV_WINDOWING_LIST_APPEAR_DELAY = 0.15f; // Time static const float RESIZE_WINDOWS_FROM_EDGES_HALF_THICKNESS = 4.0f; // Extend outside and inside windows. Affect FindHoveredWindow(). static const float RESIZE_WINDOWS_FROM_EDGES_FEEDBACK_TIMER = 0.04f; // Reduce visual noise by only highlighting the border after a certain time. +// Docking +static const float DOCKING_TRANSPARENT_PAYLOAD_ALPHA = 0.50f; // For use with io.ConfigDockingTransparentPayload. Apply to Viewport _or_ WindowBg in host viewport. + //------------------------------------------------------------------------- // [SECTION] FORWARD DECLARATIONS //------------------------------------------------------------------------- @@ -1114,6 +1117,7 @@ ImGuiIO::ImGuiIO() // Miscellaneous configuration options ConfigDockingWithShift = false; + ConfigDockingTransparentPayload = false; #ifdef __APPLE__ ConfigMacOSXBehaviors = true; // Set Mac OS X style defaults based on __APPLE__ compile time flag #else @@ -3281,6 +3285,8 @@ void ImGui::NewFrame() IM_ASSERT(g.PlatformIO.Platform_GetWindowSize != NULL && "Platform init didn't install handlers?"); IM_ASSERT(g.PlatformIO.Platform_SetWindowSize != NULL && "Platform init didn't install handlers?"); IM_ASSERT((g.Viewports[0]->PlatformUserData != NULL || g.Viewports[0]->PlatformHandle != NULL) && "Platform init didn't setup main viewport."); + if (g.IO.ConfigDockingTransparentPayload && (g.IO.ConfigFlags & ImGuiConfigFlags_DockingEnable)) + IM_ASSERT(g.PlatformIO.Platform_SetWindowAlpha != NULL && "Platform_SetWindowAlpha handler is required to use io.ConfigDockingTransparent!"); #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS IM_ASSERT(g.IO.RenderDrawListsFn == NULL); // Call ImGui::Render() then pass ImGui::GetDrawData() yourself to your render function! #endif @@ -5367,13 +5373,29 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags) // Window background if (!(flags & ImGuiWindowFlags_NoBackground)) { + bool is_docking_transparent_payload = false; + if (g.DragDropActive && (g.FrameCount - g.DragDropAcceptFrameCount) <= 1 && g.IO.ConfigDockingTransparentPayload) + if (g.DragDropPayload.IsDataType(IMGUI_PAYLOAD_TYPE_WINDOW) && *(ImGuiWindow**)g.DragDropPayload.Data == window) + is_docking_transparent_payload = true; + ImU32 bg_col = GetColorU32(GetWindowBgColorIdxFromFlags(flags)); - if (g.NextWindowData.BgAlphaCond != 0) - bg_col = (bg_col & ~IM_COL32_A_MASK) | (IM_F32_TO_INT8_SAT(g.NextWindowData.BgAlphaVal) << IM_COL32_A_SHIFT); if (window->ViewportOwned) { - //window->Viewport->Alpha = ((bg_col & IM_COL32_A_MASK) >> IM_COL32_A_SHIFT) / 255.0f; + // No alpha bg_col = (bg_col | IM_COL32_A_MASK); + if (is_docking_transparent_payload) + window->Viewport->Alpha *= DOCKING_TRANSPARENT_PAYLOAD_ALPHA; + } + else + { + // Adjust alpha. For docking + float alpha = 1.0f; + if (g.NextWindowData.BgAlphaCond != 0) + alpha = g.NextWindowData.BgAlphaVal; + if (is_docking_transparent_payload) + alpha *= DOCKING_TRANSPARENT_PAYLOAD_ALPHA; + if (alpha != 1.0f) + bg_col = (bg_col & ~IM_COL32_A_MASK) | (IM_F32_TO_INT8_SAT(alpha) << IM_COL32_A_SHIFT); } window->DrawList->AddRectFilled(window->Pos + ImVec2(0, window->TitleBarHeight()), window->Pos + window->Size, bg_col, window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? ImDrawCornerFlags_All : ImDrawCornerFlags_Bot); } @@ -7534,7 +7556,7 @@ static void ImGui::UpdateViewports() if (g.PlatformIO.Platform_GetWindowMinimized && (n == 0 || viewport->CreatedPlatformWindow)) viewport->PlatformIsMinimized = g.PlatformIO.Platform_GetWindowMinimized(viewport); - // Apply Position and Size (from Platform Window to ImGui) if requested. + // Update Position and Size (from Platform Window to ImGui) if requested. // We do it early in the frame instead of waiting for UpdatePlatformWindows() to avoid a frame of lag when moving/resizing using OS facilities. if (!viewport->PlatformIsMinimized) { @@ -7548,6 +7570,9 @@ static void ImGui::UpdateViewports() viewport->PlatformMonitor = FindPlatformMonitorForRect(viewport->GetRect()); } + // Reset alpha every frame. Users of transparency (docking) needs to request a lower alpha back. + viewport->Alpha = 1.0f; + // Translate imgui windows when a Host Viewport has been moved // (This additionally keeps windows at the same place when ImGuiConfigFlags_ViewportsEnable is toggled!) ImVec2 viewport_delta = viewport->Pos - viewport->LastPos; @@ -11352,19 +11377,23 @@ static void ImGui::DockNodePreviewDockRender(ImGuiWindow* host_window, ImGuiDock { ImGuiContext& g = *GImGui; + // With this option, we only display the preview on the target viewport, and the payload viewport is made transparent. + // To compensate for the single layer obstructed by the payload, we'll increase the alpha of the preview nodes. + const bool is_transparent_payload = g.IO.ConfigDockingTransparentPayload; + // In case the two windows involved are on different viewports, we will draw the overlay on each of them. int overlay_draw_lists_count = 0; ImDrawList* overlay_draw_lists[2]; overlay_draw_lists[overlay_draw_lists_count++] = GetOverlayDrawList(host_window->Viewport); - if (host_window->Viewport != root_payload->Viewport) + if (host_window->Viewport != root_payload->Viewport && !is_transparent_payload) overlay_draw_lists[overlay_draw_lists_count++] = GetOverlayDrawList(root_payload->Viewport); // Draw main preview rectangle const ImU32 overlay_col_tabs = GetColorU32(ImGuiCol_TabActive); - const ImU32 overlay_col_main = GetColorU32(ImGuiCol_DockingPreview, 0.40f); - const ImU32 overlay_col_drop = GetColorU32(ImGuiCol_DockingPreview, 0.70f); - const ImU32 overlay_col_drop_hovered = GetColorU32(ImGuiCol_DockingPreview); - const ImU32 overlay_col_lines = GetColorU32(ImGuiCol_NavWindowingHighlight, 0.60f); + const ImU32 overlay_col_main = GetColorU32(ImGuiCol_DockingPreview, is_transparent_payload ? 0.60f : 0.40f); + const ImU32 overlay_col_drop = GetColorU32(ImGuiCol_DockingPreview, is_transparent_payload ? 0.90f : 0.70f); + const ImU32 overlay_col_drop_hovered = GetColorU32(ImGuiCol_DockingPreview, is_transparent_payload ? 1.20f : 1.00f); + const ImU32 overlay_col_lines = GetColorU32(ImGuiCol_NavWindowingHighlight, is_transparent_payload ? 0.80f : 0.60f); // Display area preview const bool can_preview_tabs = (root_payload->DockNodeAsHost == NULL || root_payload->DockNodeAsHost->Windows.Size > 0); diff --git a/imgui.h b/imgui.h index 50ffa88f..9984049a 100644 --- a/imgui.h +++ b/imgui.h @@ -1275,11 +1275,12 @@ struct ImGuiIO ImVec2 DisplayFramebufferScale; // = (1.0f,1.0f) // For retina display or other situations where window coordinates are different from framebuffer coordinates. User storage only, presently not used by ImGui. // Miscellaneous configuration options - bool MouseDrawCursor; // = false // Request ImGui to draw a mouse cursor for you (if you are on a platform without a mouse cursor). Cannot be easily renamed to 'io.ConfigXXX' because this is frequently used by back-end implementations. - bool ConfigDockingWithShift; // = false // Enable docking with holding Shift key (reduce visual noise, allows dropping in wider space) - bool ConfigMacOSXBehaviors; // = defined(__APPLE__) // OS X style: Text editing cursor movement using Alt instead of Ctrl, Shortcuts using Cmd/Super instead of Ctrl, Line/Text Start and End using Cmd+Arrows instead of Home/End, Double click selects by word instead of selecting whole text, Multi-selection in lists uses Cmd/Super instead of Ctrl (was called io.OptMacOSXBehaviors prior to 1.63) - bool ConfigInputTextCursorBlink; // = true // Set to false to disable blinking cursor, for users who consider it distracting. (was called: io.OptCursorBlink prior to 1.63) - bool ConfigResizeWindowsFromEdges; // = true // [BETA] Enable resizing of windows from their edges and from the lower-left corner. This requires (io.BackendFlags & ImGuiBackendFlags_HasMouseCursors) because it needs mouse cursor feedback. (This used to be the ImGuiWindowFlags_ResizeFromAnySide flag) + bool MouseDrawCursor; // = false // Request ImGui to draw a mouse cursor for you (if you are on a platform without a mouse cursor). Cannot be easily renamed to 'io.ConfigXXX' because this is frequently used by back-end implementations. + bool ConfigDockingWithShift; // = false // Enable docking with holding Shift key (reduce visual noise, allows dropping in wider space) + bool ConfigDockingTransparentPayload; // = false // [BETA] Make window or viewport transparent when docking and only display docking boxes on the target viewport. Useful if rendering of multiple viewport can be synced. Best used with ImGuiConfigFlags_ViewportsNoMerge. + bool ConfigMacOSXBehaviors; // = defined(__APPLE__) // OS X style: Text editing cursor movement using Alt instead of Ctrl, Shortcuts using Cmd/Super instead of Ctrl, Line/Text Start and End using Cmd+Arrows instead of Home/End, Double click selects by word instead of selecting whole text, Multi-selection in lists uses Cmd/Super instead of Ctrl (was called io.OptMacOSXBehaviors prior to 1.63) + bool ConfigInputTextCursorBlink; // = true // Set to false to disable blinking cursor, for users who consider it distracting. (was called: io.OptCursorBlink prior to 1.63) + bool ConfigResizeWindowsFromEdges; // = true // [BETA] Enable resizing of windows from their edges and from the lower-left corner. This requires (io.BackendFlags & ImGuiBackendFlags_HasMouseCursors) because it needs mouse cursor feedback. (This used to be the ImGuiWindowFlags_ResizeFromAnySide flag) //------------------------------------------------------------------ // Settings (User Functions) diff --git a/imgui_internal.h b/imgui_internal.h index 5f746f5e..9f4dbe7d 100644 --- a/imgui_internal.h +++ b/imgui_internal.h @@ -1490,6 +1490,7 @@ namespace ImGui inline bool IsNavInputPressedAnyOfTwo(ImGuiNavInput n1, ImGuiNavInput n2, ImGuiInputReadMode mode) { return (GetNavInputAmount(n1, mode) + GetNavInputAmount(n2, mode)) > 0.0f; } // Docking + // (some functions are only declared in imgui.cpp, see Docking section) IMGUI_API void DockContextInitialize(ImGuiContext* ctx); IMGUI_API void DockContextShutdown(ImGuiContext* ctx); IMGUI_API void DockContextOnLoadSettings(ImGuiContext* ctx);