better grid drawing

[vrlugburz] / tools / dunger / src / main.c

diff --git a/tools/dunger/src/main.c b/tools/dunger/src/main.c
index 7c022c1..52074ba 100644 (file)
--- a/tools/dunger/src/main.c
+++ b/tools/dunger/src/main.c
@@ -25,9 +25,14 @@ static int utextwidth(const char *txt, int sz);
 
 int win_width, win_height;
 int view_width, view_height;
+float view_panx, view_pany, view_zoom = 1.0f;
+
+static int bnstate[8];
+static int mousex, mousey, clickx, clicky;
 
 static float uiscale = 1.0f;
 #define UISPLIT        150
+static int splitx;
 
 #define FONTSZ 16
 static struct dtx_font *uifont;
@@ -101,6 +106,10 @@ static int init(void)
                return -1;
        }
 
+       splitx = UISPLIT * uiscale;
+       view_width = win_width - splitx;
+       view_height = win_height;
+
        return 0;
 }
 
@@ -113,11 +122,6 @@ static void cleanup(void)
 
 static void display(void)
 {
-       int splitx = UISPLIT * uiscale;
-
-       view_width = win_width - splitx;
-       view_height = win_height;
-
        glClear(GL_COLOR_BUFFER_BIT);
 
        glMatrixMode(GL_MODELVIEW);
@@ -187,12 +191,42 @@ static void mouse(int bn, int st, int x, int y)
        int bidx = bn - GLUT_LEFT_BUTTON;
        int press = st == GLUT_DOWN;
 
+       bnstate[bidx] = press;
+       mousex = x;
+       mousey = y;
+
+       if(bn <= 2) {
+               if(press) {
+                       clickx = x;
+                       clicky = y;
+               } else {
+                       clickx = clicky = -1;
+               }
+       } else if(bn == 3) {
+               if(press) view_zoom += 0.1;
+       } else if(bn == 4) {
+               if(press) view_zoom -= 0.1;
+       }
+
        utk_mbutton_event(bidx, press, x / uiscale, y / uiscale);
        glutPostRedisplay();
 }
 
 static void motion(int x, int y)
 {
+       int dx, dy;
+       dx = x - mousex;
+       dy = y - mousey;
+       mousex = x;
+       mousey = y;
+
+       if(clickx >= splitx) {
+               if(bnstate[1]) {
+                       view_panx -= dx;
+                       view_pany += dy;
+               }
+       }
+
        utk_mmotion_event(x / uiscale, y / uiscale);
        glutPostRedisplay();
 }