Initial Filedump

Tadaaa!!

1 files changed, 123 insertions, 0 deletions

diff --git a/sw/emu/knob.cpp b/sw/emu/knob.cpp
new file mode 100755
index 0000000..0883ab3
--- /dev/null
+++ b/sw/emu/knob.cpp
@@ -0,0 +1,123 @@
+#include "imgui.h"
+#include <math.h>
+#include <stdio.h>
+#define PI 3.1415926535897932384626433832795f
+typedef unsigned int u32;
+ 
+inline float lerp(float a, float b, float t) { return a+(b-a)*t; }
+inline float saturate(float a) { return (a<0.f)?0.f:(a>1.f)?1.f:a; }
+inline float length(float x, float y ){ return sqrtf(x*x+y*y); }
+
+int TactileButton(const char *label, float size) {
+	ImVec4 hilitecol = ImGui::GetStyle().Colors[ImGuiCol_FrameBg];
+	hilitecol.x+=0.1f;
+	auto style=ImGui::GetStyle();		
+	ImDrawList* draw_list = ImGui::GetWindowDrawList();
+	ImVec2 mouse_pos = ImGui::GetIO().MousePos;
+	ImVec2 canvas_pos = ImGui::GetCursorScreenPos();            // ImDrawList API uses screen coordinates!
+	float w=size,/*ImGui::CalcItemWidth(),*/ h=size;
+	ImVec2 canvas_size = ImVec2(w,h);
+	ImVec2 centre=ImVec2(canvas_pos.x+w*0.5f,canvas_pos.y+h*0.45f);
+	ImGui::InvisibleButton(label, canvas_size);
+	draw_list->PushClipRect(canvas_pos, ImVec2(canvas_pos.x+canvas_size.x, canvas_pos.y+canvas_size.y),true);      // clip lines within the canvas (if we resize it, etc.)
+	bool active=ImGui::IsItemActive();
+	draw_list->AddCircleFilled(ImVec2(centre.x,centre.y),h*0.45f,active ? 0x80ffffff : 0x40ffffff, 32);
+	ImVec2 labelsize=ImGui::CalcTextSize(label);
+	draw_list->AddText(ImVec2(centre.x-labelsize.x*0.5f,canvas_pos.y-labelsize.y+h*0.5f),ImColor(style.Colors[ImGuiCol_Text]),label);
+	draw_list->PopClipRect();		
+	return active;
+}
+
+int Knob(const char *label, float &curval, float *randamount, float minval, float maxval, u32 encodercol, float size)
+{
+
+	ImVec4 hilitecol = ImGui::GetStyle().Colors[ImGuiCol_FrameBg];
+	hilitecol.x+=0.1f*(curval-minval)/(maxval-minval);
+//	hilitecol.z-=0.3f;
+	static ImVec2 click_pos;	
+	static float click_val,click_rand;
+	static int grabrand;
+	static bool clickedbutton;
+	auto style=ImGui::GetStyle();		
+	ImDrawList* draw_list = ImGui::GetWindowDrawList();
+	ImVec2 mouse_pos = ImGui::GetIO().MousePos;
+	ImVec2 canvas_pos = ImGui::GetCursorScreenPos();            // ImDrawList API uses screen coordinates!
+	float w=size,/*ImGui::CalcItemWidth(),*/ h=size;
+	ImVec2 canvas_size = ImVec2(w,h);
+	ImVec2 centre=ImVec2(canvas_pos.x+w*0.5f,canvas_pos.y+h*0.45f);
+	ImGui::InvisibleButton(label, canvas_size);
+	draw_list->PushClipRect(canvas_pos, ImVec2(canvas_pos.x+canvas_size.x, canvas_pos.y+canvas_size.y),true);      // clip lines within the canvas (if we resize it, etc.)
+	float rad=h*0.4f;
+	ImColor bg= hilitecol;// : style.Colors[ImGuiCol_FrameBg];	
+	u32 tickcol=0x80ffffff;
+	if (encodercol==1)
+		encodercol=bg;
+	float angrange=encodercol ? 3.141592f : 2.5f;
+	float curang=lerp(-angrange,angrange,(curval-minval)/(maxval-minval));
+
+	draw_list->PathClear();
+	draw_list->PathArcTo(centre,rad,-angrange - PI/2,angrange - PI/2,20);
+	draw_list->PathStroke(bg,false,rad*0.2f);
+	bool active=ImGui::IsItemActive();
+	if (active && ImGui::IsMouseClicked(0)) { 
+		clickedbutton=false;
+		click_pos=mouse_pos; click_val=curval; click_rand=randamount ? *randamount : 0.f; 
+		grabrand=randamount && ImGui::GetIO().KeyShift;
+		if (length(mouse_pos.x-centre.x, mouse_pos.y-centre.y)<h*0.3f)
+			clickedbutton=true;
+	}	
+
+	if (!encodercol) {
+		draw_list->PathClear();
+		draw_list->PathArcTo(centre,rad,-angrange-PI/2,curang-PI/2,20);
+		draw_list->PathStroke(tickcol,false,rad*0.2f);
+	} else {
+		draw_list->AddCircleFilled(ImVec2(centre.x,centre.y),h*0.3f,active && clickedbutton ? tickcol : encodercol, 32);
+	}
+	draw_list->AddCircleFilled(ImVec2(centre.x+0.f,centre.y-h*0.48f),h*0.02f,tickcol);
+
+	ImColor barcol=(style.Colors[ImGuiCol_SliderGrabActive]); //:(i==hover)?ImGuiCol_CheckMark:ImGuiCol_ScrollbarGrab]))
+	if (randamount && *randamount>0.f) {
+		float minang=curang-angrange**randamount; if (minang<-angrange) minang=-angrange;
+		float maxang=minang+angrange**randamount; if (maxang>angrange) { maxang=angrange; minang=maxang-angrange**randamount*2.f; }
+		draw_list->PathClear();
+		draw_list->PathArcTo(centre,rad,minang,maxang,20);
+		draw_list->PathStroke(barcol,false,rad*0.05f);
+	}
+	float rad0=rad*0.4f;
+	float rad2=rad+0.05f*h;
+	draw_list->AddLine(ImVec2(centre.x+rad0*sinf(curang),centre.y-rad0*cosf(curang)), ImVec2(centre.x+rad2*sinf(curang),centre.y-rad2*cosf(curang)),tickcol, 2.f);
+	int rv=0;
+	if (active) {
+		float angdelta = -atan2f(mouse_pos.x-centre.x, mouse_pos.y-centre.y) + atan2f(click_pos.x-centre.x,click_pos.y-centre.y);
+//		if (clickedbutton)
+//			angdelta=0.f;
+		if (angdelta>PI) angdelta-=PI*2.f;
+		if (angdelta<-PI) angdelta+=PI*2.f;
+		angdelta*=1.f/(angrange*2.f);
+//		ImVec2 delta(mouse_pos.x-click_pos.x,mouse_pos.y-click_pos.y);
+//		float angdelta=((fabsf(delta.x)>fabsf(delta.y)) ? delta.x : -delta.y) / h;
+		if (grabrand && randamount) 
+			*randamount=saturate(click_rand+angdelta);
+		else
+		{
+			curval=click_val+angdelta*(maxval-minval);
+			if (!encodercol) {
+				if (curval<minval) curval=minval;
+				if (curval>maxval) curval=maxval;
+			}
+		}
+		click_pos=mouse_pos; click_val=curval; click_rand=randamount ? *randamount : 0.f; 
+	}
+	draw_list->PopClipRect();		
+
+//	char valuebuf[64];
+	//snprintf(valuebuf,sizeof(valuebuf),"%.1f%%",curval*100.f);
+   ImVec2 labelsize=ImGui::CalcTextSize(label);
+//   ImVec2 valuesize=ImGui::CalcTextSize(valuebuf);
+
+	draw_list->AddText(ImVec2(centre.x-labelsize.x*0.5f,canvas_pos.y-labelsize.y+h*0.5f),ImColor(style.Colors[ImGuiCol_Text]),label);
+//	if (!encodercol)
+//		draw_list->AddText(ImVec2(centre.x-valuesize.x*0.5f,canvas_pos.y+canvas_size.y-valuesize.y-2.f),ImColor(style.Colors[ImGuiCol_Text]),valuebuf);
+	return clickedbutton && active;
+}